Brinell and rockwell hardness tester

Introduction

A Brinell and Rockwell hardness tester is an instrument used to measure the hardness of the materials by the Brinell and the Rockwell methods, and it is used in the manufacturing, the metallurgy, the quality control, and the many other industries for the hardness testing of the metals and the other materials. The Brinell method measures the hardness by the indentation of a hardened steel or a carbide ball into the surface of the material under a specified load, and the measurement of the diameter of the indentation, and the Brinell hardness number (HB) is calculated; the Rockwell method measures the hardness by the measurement of the depth of the indentation, made by an indenter, such as a diamond cone or a steel ball, under the preliminary and the total loads, and the Rockwell hardness number is read directly on the scale; the Brinell and Rockwell hardness tester consists of a test frame, an indenter, a load application system, and the measurement system, and it may perform the Brinell and the Rockwell tests, with features such as the various scales, the digital display, and the data management; the hardness tester is used for the hardness testing of the metals, such as the steel, the cast iron, the aluminum, and the copper alloys, for the quality control, for the material verification, for the research, and for many other applications, and it is available as the bench-top and the portable models; the hardness tester is an essential instrument for the hardness testing. Brinell and Rockwell hardness testers are used in the manufacturing, in the metallurgy, in the quality control, in the laboratories, and for many other applications. With their hardness testing, Brinell and Rockwell hardness testers are essential for the material testing.

Brinell And Rockwell Hardness Tester LBRH-T2010

Brinell and Rockwell Hardness Tester perform main test forces from 60 to 150 kgf for versatile hardness testing. It measures hardness within ranges of 20 to 95 , 10 to 100 , and 20 to 70...

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Standards

ISO 6506-1-Metallic materials-Brinell hardness test-Test method

ASTM E18-Standard Test Methods for Rockwell Hardness of Metallic Materials

ASTM E10-Standard Test Method for Brinell Hardness of Metallic Materials

ISO 6508-1:2015-Metallic materials-Rockwell hardness test-Test method

Complies with the above standards, but is not limited to them.

Features

1. Brinell and Rockwell hardness tester for measuring hardness of metals and materials using indentation methods.

2. Combined or dual-scale hardness tester supporting Brinell (ball indentation) and Rockwell (diamond cone/ball) test methods.

3. Suitable for manufacturing, metalworking, heat treatment, automotive, aerospace, foundry and quality control.

4. Includes tester body, indenters (Brinell ball, Rockwell diamond cone/ball), weights, test block, anvil and manual.

5. Supports Brinell (HBW) and Rockwell (HRC, HRB, HRA, etc.) hardness measurement of ferrous and non-ferrous metals.

FAQ

Q1: What testing scenarios is this tester mainly applied to?

A: The Brinell and Rockwell hardness tester is used in manufacturing, metalworking, heat treatment, automotive, aerospace, foundry, forging, and quality control to measure the hardness of metals and engineering materials using standardized indentation methods, verifying material properties, heat treatment quality, and conformance to specifications. It supports metal manufacturing and processing (steel, stainless steel, aluminum, copper, brass, titanium, cast iron, forged parts - verify hardness after heat treatment (quenching, tempering, annealing, case hardening, nitriding), incoming material inspection, in-process QC, finished product verification), automotive (engine components (crankshafts, camshafts, gears, valves, bearings - hardness affects wear resistance and fatigue), body panels, fasteners, suspension parts, brake components), aerospace (turbine blades, landing gear, structural components, fasteners - critical for fatigue and material certification; strict hardness specs per AMS standards), foundry and casting (cast iron, cast steel, aluminum castings - hardness as indicator of microstructure and mechanical properties; Brinell preferred for castings with coarse grain/heterogeneous structure), heat treatment shops (verify quench hardness, tempering, case depth (surface hardness + core hardness), batch consistency), fasteners and bolts (hardness testing per ISO 898, ASTM F568, SAE J429 - hardness correlates with tensile strength; too hard = brittle, too soft = weak), tool and die (cutting tools, dies, molds - hardness (HRC 58-65 for tool steels) affects wear life and performance), and research/QC (material science, failure analysis, process optimization, batch-to-batch consistency, certification of materials). Brinell (HBW): Uses tungsten carbide ball (1-10 mm diameter), load 1-3000 kgf, measures indentation diameter with microscope; good for soft/rough/heterogeneous materials (cast iron, aluminum, copper, annealed steels), large indent averages out grain structure. Rockwell (HRC/HRB/HRA): Uses diamond cone (HRC/HRA for hard materials) or ball (HRB for soft materials), minor load (10 kgf) + major load (60/100/150 kgf), measures indentation depth directly (no microscope needed); fast, non-destructive-ish, good for finished parts, hard materials (HRC for hardened steel >HRC 20, HRB for soft steel/non-ferrous

Q2: What standards does the tester comply with?

A: The Brinell and Rockwell hardness tester follows relevant ISO, ASTM, JIS, EN and GB/T standards including ISO 6506 (metallic materials - Brinell hardness test - parts 1-4: test method, verification, calibration of blocks, indenters), ISO 6508 (metallic materials - Rockwell hardness test - parts 1-3), ASTM E10 (standard test method for Brinell hardness of metallic materials), ASTM E18 (standard test methods for Rockwell hardness of metallic materials), ASTM E384 (microindentation hardness (Knoop, Vickers) - not this machine but related), JIS Z2243 (Brinell), JIS Z2245 (Rockwell), EN ISO 6506/6508, and GB/T 231 (Brinell), GB/T 230 (Rockwell). The hardware complies with applicable hardness tester standards (force accuracy +/- 1%, indentation measurement resolution, geometry of indenters per standard) and EMC. Calibration uses certified hardness test blocks (reference blocks traceable to national standards (NIST, PTB, NIM) per ISO 6506-3/6508-3, ASTM E10/E18) and verified indenters (ball diameter, diamond cone geometry per ISO 6506-2/6508-2). For regulated industries (aerospace, automotive, nuclear), follow applicable material standards (ASTM, SAE, AMS, ISO) and quality systems (ISO 9001/AS9100/IATF 16949). For safety-critical components, specific industry standards apply.

Q3: What is the warranty period for the whole tester and key components?

A: The whole hardness tester is covered by a 12-24 month warranty (metrology instruments often 2 years). The tester frame, load mechanism, depth measurement system (Rockwell), anvil, and housing are covered, while indenters (Brinell tungsten carbide ball - can chip/deform; Rockwell diamond cone - can chip/crack (expensive); both are wear/replaceable parts), weights (if dead-weight type), test blocks (wear/replaceable - surface gets indented over time, replace or use unused area), and bulbs/lamp (for Brinell microscope) are consumables/accessories. Damage from improper use, indenter damage (diamond cone chipping from impact/hard materials, ball deformation - avoid dropping indenter, use correct load), overloading (exceeding load capacity - can damage mechanism), testing on dirty/rough surfaces (inaccurate readings, indenter damage), liquid/corrosive ingress, or unauthorized repair is excluded. Extended warranty and service contracts (calibration, indenter replacement) may be available. Mechanism lasts 10+ years; indenters need periodic replacement (diamond cone: 1-5 years depending on use; ball: 1-3 years).

Q4: Is this device difficult to operate? Is professional training required?

A: Operation requires trained QC/metrology personnel (proper setup, method selection, result interpretation). We provide operation manuals, installation, and training. Proper instrument setup (place on stable, level, vibration-free bench (hardness testers are sensitive to vibration; use anti-vibration table or solid bench), ensure adequate clearance, level the tester (built-in spirit level), connect power (motorized/automated models), allow warm-up (if electronic), verify anvil and indenter are clean and securely mounted), select test method and scale (Brinell: select ball diameter (1, 2, 2.5, 5, 10 mm - most common 10 mm for general, 5 mm for smaller parts), load (F/D^2 ratio constant: for steel 30D^2 (e.g., 10 mm ball = 3000 kgf), for soft metals 5D^2 or 10D^2; load application time 10-15 s, dwell 10-15 s (30 s for soft materials); measure indentation diameter with microscope (average of two perpendicular diameters), calculate HBW = 0.102 x 2F / (pi D (D - sqrt(D^2 - d^2))) where F=load (N), D=ball diameter (mm), d=indentation diameter (mm); or use conversion tables/charts), Rockwell: select scale (HRC (diamond cone, 150 kgf) for hardened steel, tool steel, hard cast iron (>HRC 20); HRB (1.588 mm ball, 100 kgf) for soft steel, copper, brass, aluminum (100, switch to HRC), apply minor load (10 kgf) to set zero, apply major load (60/100/150 kgf), dwell (4-6 s standard, longer for soft materials), remove major load, read hardness directly from dial/display (Rockwell measures depth, no microscope needed), sample preparation (ensure test surface is flat, clean, smooth (remove scale, decarburization, coatings, oxidation by grinding/polishing - surface condition significantly affects readings; for Brinell on rough castings, may test as-is but note surface condition), sample thickness >= 10x indentation depth (or >= 8x for Rockwell; if too thin, indentation affects anvil/back side = inaccurate; use superficial Rockwell (HRN, HRT) for thin materials), support sample securely on anvil (flat anvil for flat parts, V-anvil for cylindrical parts (round bars/tubes), spot anvil for small parts; ensure no movement), avoid testing near edges (indentation center >= 2.5x indent diameter from edge for Brinell, >= 3x for Rockwell; avoid edge effect), spacing between indentations >= 3x diameter (Brinell) or >= 3mm (Rockwell) to avoid work-hardening effect), test execution (place sample on anvil, raise anvil until contact with indenter, apply minor load (Rockwell) / start load cycle (Brinell), apply major load smoothly (no shock), hold for specified dwell time, remove load, lower anvil, for Brinell: measure indentation diameter with built-in microscope or separate microscope (measure two perpendicular diameters, average; ensure good lighting, focus), for Rockwell: read value from dial/display (red/black scales depending on scale), repeat (3-5 measurements per sample, average; discard outliers; for certification, per standard (e.g., 3 readings for Rockwell, report average and range)), post-test (lower anvil, remove sample, inspect indentation (Brinell: should be regular circle; if elongated, sample not flat or anisotropic - discard), clean indenter and anvil (wipe with soft cloth; do not use abrasive on diamond), record results (method, scale, load, indenter, sample ID, location, individual readings, average, date, operator; for material certification, include test standard and equipment ID), maintenance (regular cleaning (after each use - clean indenter, anvil, exterior; weekly: clean microscope lens (Brinell), check level, lubricate moving parts (per manufacturer), indenter inspection (Brinell ball: check for deformation/chipping (under microscope; replace if deformed); Rockwell diamond: check for chips/cracks at tip (under microscope; diamond cone tip is fragile - chipped diamond gives inaccurate readings; replace if damaged), anvil inspection (check for wear, indentations on flat anvil surface - replace or resurface if worn), calibration (every 6-12 months with certified hardness test blocks (calibrate each scale/method used: e.g., HRC block ~40 HRC, HRB block ~80 HRB, HBW block ~200 HBW; verify at low/mid/high range; if out of tolerance, service/adjust; for Brinell, also verify ball diameter and load), routine check with test block before each use or at start of shift (quick verification), troubleshooting (readings inconsistent (sample not flat/secure, surface not prepared, indent too close to edge/another indent, vibration, anvil wrong type - prepare surface, secure sample, proper spacing, stabilize), readings too high (surface work-hardened from machining (need to remove decarburized/work-hardened layer by grinding), indenter chipped (Rockwell diamond), load too high, sample too thin (anvil effect) - grind surface, inspect/replace indenter, verify load, use appropriate scale/superficial), readings too low (surface decarburized (soft layer - grind off), ball deformed (Brinell), load too low, indentation measurement error (Brinell microscope) - grind surface, replace ball, verify load, remeasure diameter), indenter not moving (mechanism jammed, anvil not raising, load issue - service, check), calibration fails (test block worn (use unused area or new block), indenter damaged, load mechanism out of calibration - replace block/indenter, service), and safety (indenter hazard (diamond cone and carbide ball are hard/sharp - do not touch tip, avoid dropping; diamond can shatter if struck - handle carefully), moving parts (keep fingers clear when anvil raises/lowers; pinch hazard), heavy weights (dead-weight testers have heavy weights - use caution when changing loads), sample handling (sharp metal parts, hot parts (after heat treatment - allow to cool to room temp before testing; hardness is temperature-dependent), eye protection (when grinding samples, metal chips; use safety glasses), electrical (motorized models - proper grounding), do not overload tester (exceeding load capacity damages mechanism), do not test on anvil directly (without sample - damages indenter/anvil)) are important for accurate hardness testing.

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Calibration recommended every 6-12 months (or per quality system) using certified hardness test blocks (reference blocks traceable to national standards per ISO 6506-3/6508-3, ASTM E10/E18; calibrate each method/scale used at low/mid/hardness points (e.g., HRC 25, 45, 60; HRB 50, 80; HBW 100, 200, 300); force verification with certified load cell (every 12 months per ISO 6506-2/6508-2); indenter verification (ball diameter, diamond cone geometry - annually or when replaced). If tester is moved, indenter replaced, or readings seem off, recalibrate immediately. Routine verification with test block before each use or at start of shift (quick check on one scale). For ISO 17025/AS9100/IATF 16949 labs, follow applicable calibration schedules and maintain records (calibration certificates, test block ID, as-found/as-left data, indenter ID, force verification). Hardness testers are relatively stable but load mechanism wear, indenter degradation, and anvil wear cause drift - regular calibration is essential for material certification and compliance.

Q7: Are supporting consumables universal?

A: Indenters (Brinell tungsten carbide balls (various diameters 1-10 mm - somewhat universal if shank fits; Rockwell diamond cone/brale (specific to tester brand (Wilson, Mitutoyo, Affri) - use OEM or certified compatible with correct geometry per ISO 6508-2), test blocks (certified hardness reference blocks - universal from metrology supply (Wilson, Mitutoyo, Affri, EMCO) but must be certified traceable; use for each scale), anvils (flat, V, spot, cylindrical - specific to tester model (anvil stem diameter varies), microscope (Brinell - built-in or separate; eyepiece with reticle), bulbs/lamp (for microscope), and cleaning supplies are available from metrology supply companies, though indenters and anvils are often tester-specific (use OEM or certified compatible to maintain accuracy and warranty). Long-term consumable cost includes indenter replacement (diamond cone is expensive ($300-$800+), carbide balls ($50-$200)) and test blocks (periodic if surface fully used).

Q8: Can I customize parameters or supporting accessories?

A: Customization includes test methods (Brinell only, Rockwell only, or combined (dual/twin - both methods in one machine; some add Vickers/Knoop for microhardness), Rockwell scales (HRC, HRB, HRA, HRD, HRE, HRF, HRG, HRH, HRK (regular); superficial HRN, HRT (for thin materials) - selectable), load application (manual (dead-weight, hand wheel/lever - simple, low cost), motorized (push-button, consistent loading - recommended for accuracy), automated/CNC (auto loading, auto measurement, multiple test points, data logging - high throughput)), Brinell measurement (manual microscope (operator measures diameter) or automatic optical (camera + software measures indent automatically - faster, less operator error)), display/control (analog dial (traditional) or digital (LED/LCD, direct reading, memory, USB/RS232 data export, software for PC, statistics, 21 CFR Part 11 for pharma)), construction (benchtop (lab/QC shop floor), rugged for production floor, large throat depth (for big parts), accessories (extra indenters (balls of various diameters, diamond cone), anvils (flat, V-anvil for round bars, spot anvil for small parts, knife edge), test blocks (multiple hardness values/ scales), calibration certificate (ISO 17025), spare bulbs, carrying case (portable models), certifications (CE, ISO 9001, ISO 17025 calibration, ASTM/ISO compliance), language and accessories. Additional indenters, anvils, and test blocks can be ordered separately.

Q9: Does the purchase include on-site installation and commissioning service?

A: Standard delivery includes hardness tester, indenters (Brinell ball + Rockwell diamond/ball), test block (one), anvil, power cord, and instruction manual. On-site installation, calibration, and operator training ARE typically included or strongly recommended for hardness testers (metrology instruments requiring proper setup, leveling, calibration verification, and user training on method selection, sample prep, and measurement technique; installation by manufacturer or certified metrology technician is standard, especially for motorized/automated models). For manual benchtop models: self-installation is feasible (level, mount indenter/anvil, calibrate with test block, use) but initial training on proper technique is recommended. Always verify with certified test block before testing production parts.

Q10: What types of samples are compatible with this equipment?

A: The Brinell and Rockwell hardness tester measures hardness of metallic materials including ferrous metals (carbon steel, alloy steel, stainless steel (austenitic, martensitic, ferritic), tool steel, die steel, cast iron (gray, ductile, malleable), wrought iron), non-ferrous metals (aluminum and alloys, copper and alloys (brass, bronze), titanium and alloys, zinc, magnesium, nickel alloys, lead, tin), sintered metals (powder metallurgy parts, cemented carbides (HRA scale)), and some hard non-metals (hard plastics, ceramics (special indenters/loads may apply; Rockwell R/M/L scales for plastics with larger ball). Brinell (HBW): Best for soft to medium-hard materials (annealed steels, cast irons, aluminum, copper, brass, magnesium; range ~8-650 HBW), rough/heterogeneous materials (castings with coarse grain - large indent averages structure), thick sections. NOT ideal for very hard materials (>650 HBW - ball deforms), very thin materials, or finished precision parts (large visible indent). Rockwell (HRC): Hardened steel, tool steel, hard cast iron, titanium (range ~20-70 HRC). Rockwell (HRB): Soft steel, copper, brass, aluminum, soft cast iron (range ~0-100 HRB). Rockwell superficial (HRN/HRT): Thin materials, case-hardened surfaces (shallow indentation). NOT compatible with: Very thin materials (<0.5 mm for regular Rockwell - use superficial or microhardness (Vickers/Knoop)), very small parts (cannot support load, indent too close to edge - use microhardness or special fixtures), non-metallic soft materials (rubber, foam - use durometer (Shore A/D) not Rockwell/Brinell), extremely hard materials (>70 HRC or >650 HBW - beyond standard range; use special scales or other methods), coated surfaces without note (coating hardness differs from substrate; thin coatings need microhardness or nanoindentation), and irregular/curved surfaces without correction (curved surfaces (round bars) need V-anvil and correction factor per ASTM E18 (convex surfaces give higher readings); very rough surfaces need preparation). IMPORTANT: Hardness testing fundamentals: (1) What is hardness? Resistance of material to permanent indentation. Correlates with tensile strength (for steels: TS (MPa) ~ 3.45 x HBW; TS (psi) ~ 500 x HBW), wear resistance, and machinability. Not a fundamental property - depends on test method. (2) Brinell (HBW): - Indenter: Tungsten carbide ball (diameter D = 1, 2, 2.5, 5, or 10 mm). - Load: F = k x D^2 (k = 30 for steel/cast iron, 10 for copper/aluminum, 5 for soft metals). E.g., 10 mm ball + 3000 kgf for steel. - Procedure: Apply load, hold 10-15 s (30 s for soft), remove, measure indent diameter d (average of 2 perpendicular measurements) with microscope. - HBW = 0.102 x 2F / (pi x D x (D - sqrt(D^2 - d^2))) (F in Newtons, D,d in mm). - Advantages: Large indent averages out grain structure (good for castings, heterogeneous), good for soft/rough materials. - Disadvantages: Slow (need microscope), large visible indent (not for finished parts), not for very hard materials (ball deforms), operator-dependent measurement. (3) Rockwell (HRC/HRB/HRA): - Indenter: Diamond cone (Brale, 120 degree cone, 0.2 mm tip radius) for HRC/HRA (hard materials); tungsten carbide ball (1.588 mm = 1/16 inch for HRB/HRF, 3.175 mm = 1/8 inch for HRE/HRG) for soft materials. - Procedure: Apply minor load (10 kgf) to set zero (seat indenter, eliminate surface variation). Apply major load (HRC=150, HRB=100, HRA=60 kgf). Dwell 4-6 s. Remove major load (keep minor load). Read hardness from depth of indentation (direct reading, no microscope). - Formula: HR = N - (depth increase / 0.002 mm) (N=100 for HRC/HRB, 130 for superficial). Deeper indent = lower hardness. - Advantages: Fast (direct reading, no microscope), small indent (suitable for finished parts), wide range (different scales), less operator-dependent. - Disadvantages: Sensitive to surface prep (must be flat, clean, remove decarburization), not for very thin/soft, indent depth small so surface condition critical. (4) Scale selection (Rockwell): - HRC (diamond, 150 kgf): Hardened steel, tool steel, hard cast iron, titanium. Range 20-70 HRC. Below 20 HRC -> use HRB (indent too deep, diamond cone geometry issues). Above 70 HRC -> use HRA or special. - HRB (1.588 mm ball, 100 kgf): Soft steel, copper, brass, aluminum, soft cast iron. Range 0-100 HRB. Above 100 HRB -> use HRC. - HRA (diamond, 60 kgf): Cemented carbides, thin hard materials, case-hardened surfaces. Range 20-85 HRA. - HRF (1.588 mm ball, 60 kgf): Very soft metals (copper, brass, aluminum thin). - Superficial (HRN: diamond, 15/30/45 kgf; HRT: ball, 15/30/45 kgf): Thin materials, case depth, small parts. (5) Key rules: - Sample thickness >= 10x indentation depth (Rockwell) or >= 8x (Brinell). If back side shows deformation, sample too thin. - Indent center >= 3x indent diameter from edge and from another indent (work-hardening zone). - Test surface must be flat, perpendicular to indenter, clean (remove scale/oxide/decarburization). Curved surfaces need correction (convex gives higher reading; use V-anvil and correction table). - For cylindrical parts (round bars): use V-anvil; apply correction factor per ASTM E18 (depends on diameter and hardness). - Avoid testing on edges, holes, shoulders (stress concentrations, edge effect). - Multiple readings (3-5), report average and range. (6) Conversion between scales: Hardness conversion tables (ASTM E140, ISO 18265) convert HBW <-> HRC <-> HRB <-> tensile strength, but conversions are APPROXIMATE and material-dependent. For certification, report the actual method/scale used, not converted values (unless conversion is specified by standard). Conversions are most reliable for plain carbon steels. (7) Common errors: - Wrong scale (using HRC on soft material (<20) or HRB on hard material (>100) = inaccurate). - Poor surface prep (not removing decarburized layer, scale, machining marks = wrong readings; decarburization = low, work-hardening = high). - Sample too thin (anvil effect = high readings). - Indent too close to edge or another indent (edge/work-hardening effect). - No dwell time (elastic recovery not complete = high readings; dwell 4-6 s Rockwell, 10-15 s Brinell). - Dirty/damaged indenter (chipped diamond = high/erratic; deformed ball = low Brinell). - Vibration during test (inconsistent readings). - Curved surface without correction (high readings on convex). - For Brinell: measuring diameter wrong (microscope focus, lighting, operator parallax). - Using worn test block for calibration (indent on used area = wrong). (8) Standards: ISO 6506 (Brinell), ISO 6508 (Rockwell), ASTM E10 (Brinell), ASTM E18 (Rockwell), ASTM E140 (conversion), JIS Z2243/Z2245, GB/T 231/230. Indenters and blocks verified per ISO 6506-2/3, 6508-2/3. (9) Choosing Brinell vs Rockwell: - Castings, rough parts, soft/heterogeneous materials -> Brinell (large indent averages structure). - Finished parts, hard materials, production QC (fast) -> Rockwell. - Thin materials, coatings -> superficial Rockwell or Vickers/Knoop microhardness. - Both -> combined tester (versatile, one machine).