hardness te...hardness tester includes standard, la rge and v-shaped anvils for holding small, large...

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Hardness Te

Stock No.: 900-330

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Hardness Tester

Operating Instructions & Parts Manual Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the products described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Retain Instructions for future reference.

Description Phase II Hardness Testers accurately measure hardness of materials in Rockwell hardness A, B, and C scales. Heat-treated steels are tested using a 120 diamond indentor in the C-scale (HRC 20-70). Soft materials are tested using a 1/16" steel ball indentor in the B-scale (HRB 25-100). Very hard materials are tested using a 120 diamond indentor in the A-scale (HRA 20-88). Tester features a weight adjustment handle for quick and easy adjustments between different scales. Release and reset levers are provided for quick and accurate testing. Hardness Tester includes standard, large and V-shaped anvils for holding small, large and round or curved materials. Storage box, 5 test blocks, 120 diamond indentor, steel ball indentor with 5 replacement balls are provided.

Unpacking Refer to Figure 1. Loose Parts Storage Box: A. Large Anvil B. V-shaped Anvil C. Five Test Blocks 1. One each, HRA 70-85 2. One each, HRB 75-95 3. One each, HRC 25-35 4. One each, HRC 40-50 5. One each, HRC 55-65 D. 120 Diamond Indentor E. 1/16" Steel Ball indentor F. Five each, Replacement 1/16"

Steel Balls G. Storage Box H. Standard Anvil Remove wood screws from side panels of crate. Remove nuts from end panels. Carefully lift crate up from base. Leave the tester bolted to crate bottom. Remove storage box from crate.

Important: The tool has been coated with a protective coating. In order to ensure proper fit and operation, the coating must be removed. Remove coating with mild solvents such as mineral spirits and a soft cloth. Nonflammable solvents are recommended. After cleaning, cover all exposed surfaces with a light coating of oil. Caution: Never use highly volatile solvents. Avoid getting cleaning solution on paint, as it may tend to deteriorate these finishes. Use soap and water on painted components.

Figure 1 – Loose Parts

Operating Instructions & Parts Manual

Unpacking (Continued) Refer to Figures 2,5,6 and 7

A. Four each -Hex head bolt, 10-1.5 x 75mm

B. Two each-Hex nut, 6x 1.0mm C. Two each-Lag bolt, 6 x 1.0 x

60mm D. Upper weight support bracket E. Two each-Hex head bolt 4-0.7

x 90mm F. Clamping plate G. Lever Clamp H. Lever Support I. Lower weight support bracket Remove plastic dust cover from tool and store it in a convenient place for reuse. Remove string binding the frame top to the frame (Fig.5, Ref. No.4 and1). To release wooden block between indentor and elevation screw (Fig.5, Ref. No.14) turn threaded handle (Fig.5, Ref. No 9) clockwise so that threaded collar travels up on the elevation screw. Continue turning the collar handle until the collar is snug against the top compartment of the elevation screw cover (Fig.5, Ref. No. 13) and wooden block is released. Return collar to original position by turning collar handle counter-clockwise. Raise and snap elevation screw cover on to cover top. (Fig 5, Ref. No. 12). Remove frame top and frame rear cover (Fig 5, Ref, Nos. 4 & 2). Remove 4 each hex head bolts (Fig 2, Ref. A) securing tester to crate bottom, keep the hex head bolts for use when mounting the tester. Remove hex head bolts to remove lever clamp and lever support (Fig. 2, Ref. E, G and H). Remove lag bolts and hex nuts (Fig.2, Ref. C and B). Remove clamping plate and upper weight support bracket (Fig. 2, Ref. F and D).

Note: Parts above shown for visual reference. Parts below shown for location reference. These are for shipping purposes and are not available as replacement parts.

Figure 2 - Unpacking


Scale Indentor Total force (Kg-F) Hardness Range A 120 Diamond 60 HRA 20-88 B 1/16" Ball 100 HRB 25-100 C 120 Diamond 150 HRC 20-70

Figure 3 Unpacking (Continued) Slowly raise weight assembly by lifting weight support rod (Fig. 7, Ref. No. 45), remove the lower weight support bracket, (Fig.2, Ref.1). Slowly lower weight assembly so that the pins on the sides of the weight are properly seated in the hooked ends of the upper and lower weight arms (Fig.7, Ref. Nos. 61 and 62). Remove the string at the front of the lever arm (Fig. 6, Ref. No. 15). Be sure lever arm counter weight (Fig. 6, Ref. No, 13) is positioned between the red marks on the lever arm. Replace frame top and secure frame rear cover to frame using the knob (Fig. 5, Ref. No. 3). General Safety Instructions 1. Never use clamps, straps, any other tooling or equipment to mount specimen to the tester anvil. 2. Always use the proper anvil supplied. 3. Be sure to use proper indentor and weight for material and hardness to be tested. (See Figure 3). Hardness Tester Should Be Maintained 1. Consult operation instructions for specific maintaining and adjusting procedures. 2. Keep the tool clean for best results. 3. Remove adjusting tools and wrenches. Form habit of checking that adjusting tools are removed before using

machine. 4. Keep all parts in working order. Check to determine that the parts will operate properly and perform their

intended function. 5. Check for damaged parts. Check for alignment, binding, breakage, mounting and any other condition that

may affect tool's operation. 6. Part that is damaged should be properly repaired or replaced. Do not perform makeshift repairs. (Use the

parts list provided to order replacement parts.) Installation Refer to Figure 2 and 7 Hardness Tester must be installed in a dust and vibration free environment. Mount tester to a support bench or table for a load of at least 500 lbs. 1. Position tester on support surface as desired, mark location of the 4 mounting holes in the corners of the

frame base and for the elevation screw on the support surface. 2. Drill 10mm (7/16") diameter holes at the 4 mounting hole locations. Drill a 2" diameter hole for the elevation

screw. Caution: The hardness tester will not operate properly unless the elevation screw is allowed to pass through a hole on the support surface. 3. Bolt tester to support surface securely using the 4 each hex head bolts (Fig.2, Ref. A), use longer 10-1.5mm

bolts if required. 4. Be sure tester is level both front/back and left/right to 0.002 in/in. 5. Read Operation Instructions and perform a hardness test using one of the test blocks. Record the time taken

for the large needle to stop after releasing the weights, time should be 4 to 8 seconds. Adjust time as necessary by turning dash pot adjustment needle and needle collar (Fig. 7, Ref. Nos.35 Nos. 36).


Operation: Refer to Figures 1,3,4,5,6,and 7 1. Determine the proper indentor, scale and weight for the material hardness to be tested (see Figure 3). Mount

the required indentor in the indentor holder using the set screw (Fig. 6, Ref. Nos. 27 and 28) on the side of the holder.

Caution: To ensure accuracy, mount the indentor by sliding it in the holder as far as possible and then securing the indentor by tightening the set screw finger-tight only. Rotate the weight adjustment handle (Fig. 7, Ref. No.53) until the required weight scale is aligned with the red alignment mark on the frame. 2. Prepare the test specimen properly. Be sure that the top and bottom surfaces of the specimen are clean and

free of any grease, oil dirt, etc and free of any burrs or debris. 3. For small specimens (under 3" maximum length or diameter) use the standard anvil, (Fig. 1,Ref. H). Use the

large anvil, (Fig 1 Ref. A), for larger specimens. Use the V-shaped anvil, (Fig.1, Ref B), for round or curved specimens.

Warning: Do not test any specimen that cannot be safely and properly positioned on and supported by the tester anvil. Test Procedure Test procedure consists of a preload of the specimen using the force of the leadscrew and a test load using the weights and lever arm assembly. Be sure that the weight reset handle (Fig. 7, Ref. No 23) is in rest position. 1. Mount specimen on required anvil. Rotate the elevation screw threaded collar (Fig 5, Ref No. 10) clockwise

slowly until the specimen contacts the indentor. Be sure to position specimen so the indentor contacts clean, untested material. (NOTE: In the unloaded position, the needle on the indicator will be approx. in the 90HRC range

2. Preload the specimen by rotating the threaded collar slowly until the large needle on the dial indicator assembly (Fig.5, Ref.No.6) rotates three (3) revolutions. Stop rotation of threaded collar when the large needle is within 5 hash marks of vertical as shown in Figure 4.

Caution: As the large needle is properly rotated 3 revolutions, the small needle rotates counterclockwise 90 to vertical at the red dot. If the large needle overshoots vertical by more than 5 hash marks, the test is invalid and must be repeated from step 1.

Figure 4 - Dial Indicator


Test Procedure (Continued) Figure 4 shows the proper preload position of the large and small needle on the dial indicator. 3. Rotate the bezel so that the hash mark at the B-C mark at the top of the dial is aligned with the large needle. 4. Pull the weight release handle (Fig. 7, Ref. No. 3) to lower the weights and indentor. Wait until the large

needle stops rotating, at least 10 seconds. 5. Slowly push the weight reset handle (Fig.7, Ref. No. 23) back until it resets and locks in the reset position. 6. Read the material hardness from the required scale (see Figure 3) on the dial. 7. Rotate the elevation screw threaded collar counterclockwise to lower and release the specimen. Maintenance 1. If large needle on the dial indicator rotates suddenly at first and then slows during a test, then the dash pot

(Fig. 7, Ref .No 33) may be low on oil. To fill the dash pot, remove the felt cover and pour hydraulic oil into the dash pot. Bleed the air from the dash pot by manually raising and lowering the dash pot piston until all air bubbles have been released from under the piston.

2. Be sure elevation screw and threaded collar (Fig.5, Ref. Nos. 14 and 10) are clean and lubricated. Lubricate with general purpose wheel bearing grease.

3. Keep top of leadscrew, collar and anvils clean and free of grease, oil, dirt, burrs, etc. 4. Use the test blocks periodically to check tester accuracy. Use an oil sharpening stone to remove the burrs

from the test blocks. Troubleshooting Chart Symptom Possible cause(s)

Corrective Action

Incorrect hardness measurement

1. Contaminants effecting measurement

2. Elevation screw cover & top,

(Fig. 5, Ref. Nos. 12 and 13) are interfering with specimen, anvil or elevation screw.

3. Indentor is damaged. 4. Dash pot is low on oil.

1. Be sure the anvil, top of elevation screw, threaded collar, indentor and specimen are all clean and free of oil, grease, dirt, shavings, debris, etc.

2. Be sure elevation screw cover and top is clean and free of any dirt, oil, grease, etc. Position cover properly on the elevation screw.

3. Inspect indentor for damage, replace diamond indentor if chipped or broken, replace 1/16" steel ball if deformed or damaged.

4. Refill dash pot, see Maintenance, above.

When using the test block, a different hardness is measured at different locations on the block.

1. Burrs on bottom of test block. 2. Air trapped under test block.

1. Use oil sharpening stone to remove burrs.

2. When testing different locations on a test block, slide test block on anvil, maintaining contact between anvil and block.

Dial indicator needle rotates too fast at start of test

1. Dash pot is low on oil. 1. Refill dash pot See Maintenance, above.


When ordering parts, specify: -Model Number -Serial Number -Part descriptions and number as shown in parts list

Figure 5 – Replacement Parts Illustration


Replacement Parts List (Figure 5)

Reference Number Description Part Number Quantity 1 Frame 9395 1 2 Frame rear cover 9396 1 3 Knob 9397 1 4 Frame top 9398 1 5 4-0.7 x 12mm Cone point set screw 9399 1 6 Dial indicator assembly 9400 1 7 Indicator crystal 9401 1 8 Indicator bezel spring clamp 9402 1 9 Threaded collar handle 9403 4 10 Threaded collar 9404 1 11 Standard Anvil 9405 1 12 Elevation Screw cover top 9406 1 13 Elevation Screw cover 9407 1 14 Elevation screw 9408 1 15 6-1.0 x 22mm Hex head bolt 3 16 6mm Flat washer 3 17 Elevation screw sleeve 9409 1 18 Elevation screw key 9410 1 19 4-0.7 x 10mm Fillister head screw 9307 2 20 4mm lock washer 2 Large anvil 9411 1 V-shaped anvil 9412 1 Test Block HRA 70-85 9413 1 Test Block HRB 75-95 9414 1 Test Block HRC 25-35 9415 1 Test Block HRC 40-50 9416 1 Test Block HRC 55-65 9417 1 Storage Box 9418 1 Dust Cover 9419 1

Not shown Standard Hardware Item, Can Be Purchased Locally


Figure 6- Replacement Parts Illustration



Replacement Parts List (Figure 6) Reference Number Description Part Number Quantity 1 5-0.8 x 20mm Round Head screw 2 2 5mm Flat washer 2 3 Dial lever bracket 9420 1 4 5mm-0.8 Hex nut 2 5 5-0.8 x 13mm Cone point set screw 9421 2 6 1/8 Ball bearing 9422 6 7 Dial lever 9423 1 8 Adjustment plate 9424 1 9 3mm Flat washer 2 10 3-0.5 x 8mm Round head screw 4 11 4mm-0.7 Hex nut 1 12 4-0.7 x 16mm Cone point set screw 9425 1 13 Lever arm counter weight 9426 1 14 Pivot Pin 9427 1 15 Lever arm 9428 1 16 5-0.8 x 20mm Dog point bolt 9429 1 17 Pivot shaft 9430 1 18 Pivot Bar 9431 1 19 4mm Flat washer 6 20 4-0.7 x 12mm Hex head bolt 2 21 4-0.7 x 12mm Dog point round head screw 9432 2 22 4-0.7 x 18mm Round head screw 2 23 Pivot support spacer 9433 2 24 4-0.7 x 10mm Set screw 2 25 Pivot support 9434 1 26 4-0.7 x 25mm Round head screw 2 27 Indentor holder 9435 1 28 4-0.7 x 6mm set screw 1 29 3/16" Ball bearing 8163 12 30 Sleeve 9436 1 31 5-0.8 x 6mm Cone point set screw 9437 2 32 Indentor housing 9438 1 33 6-1.0 x 15mm Socket head bolt 3 34 Bushing 9439 1 35 120 Diamond indentor 9440 1 1/16" Steel Ball indentor 9441 1 Not shown Standard Hardware Item, Can Be Purchased Locally



Figure 7- Replacement Parts Illustration


Replacement Parts List (Figure 7)

Reference Number

Description Part Number

Qty Reference Number

Description Part Number

Qty

1 Weight Release knob 9442 1 36 Needle collar 9471 2 2 2 x 16mm Dowel pin 9443 3 37 Fork rod 9472 1 3 Weight release handle 9444 1 38 5-0.8 x 8mm set screw 1 4 Rubber washer 9445 1 39 Dash pot fork 9473 1 5 Sleeve 9446 1 40 10-1.0mm Hex nut 9474 2 6 Spring 9447 1 41 Weight support rod 9475 1 7 Weight release pin 9448 1 42 Lower weight 9476 1 8 6-1.0 x 25mm Hex head

bolt 4 43 Center Weight 9477 1

9 Weight release housing 9449 1 44 Upper weight 9478 1 10 6mm-1.0 Hex nut 10 45 Weight support rod 9479 1 11 Bushing 9450 2 46 Pivot cap cylinder 9480 1 12 Weight reset gear shaft 9451 1 47 Pivot cap 9481 1 13 Bushing 9452 2 48 6mm Flat washer 8 14 Gear shaft 9453 1 49 Retaining ring 9482 4 15 Gear 9454 1 50 Roller 9483 3 16 8-1.25 x 25mm Hex head

bolt 7 51 Roller shaft 9484 2

17 8mm Flat washer 7 52 5-0.8 x 12mm cone point set screw

9485 1

18 Dash pot assembly bracket 9455 1 53 Weight adjustment handle

9486 1

19 4-0.7 x 8mm cone point set screw

9456 5 54 5-0.8x 8mm set screw 1

20 Weight release disc 9457 1 55 Idler shaft 9487 1 21 6-1.0 x 12 dog point set

screw 9458 1 56 Lever frame 9488 1

22 Weight reset hub 9459 1 57 Cam shaft 9489 1 23 Weight reset handle 9460 1 58 Large cam 9490 1 24 Weight reset knob 9461 1 59 Small cam 9491 1 25 4-5 x 35mm Taper pin 9462 3 60 Spacer 9492 1 26 Disc stop 9463 1 61 Lower weight arm 9493 2 27 Bushing 9464 1 62 Upper weight arm 9494 2 28 6-1.0 x 16mm dog point set

screw 9465 1 63 3/16" Ball bearing 9495 1

29 10-1.5 x 35mm Hex head bolt

1 64 Spring 9496 1

30 10mm Flat washer 1 65 6-1.0x 7mm set screw 1 31 Dash pot bracket 9466 1 32 4-4.5 x 30mm Taper pin 9467 2 33 Dash pot 9468 1 34 Collar 9469 1 35 Dash pot adjustment

needle 9470 1

Not shown Standard Hardware Item, Can Be Purchased Locally


ROCKWELL HARDNESS SCALES Scale Indentor Load/

KG Dial Application Brinell

L Value Working Range

A Diamond 60 Black Carbides,Thin Steel, Shallow case-hardened steel

Case carburized surfaces

Over HB 400

40-91 for hardness greater than C 65

B 1/16" Ball 100 Red Aluminum alloys, copper alloy, unhardened steel, in rolled, drawn,

extruded or cast metal

HB 100-240

30-100 for hardness lower than

C 20 C Diamond 150 Black Hard cast irons, pearlitic malleable

iron, steel deep case hardened steel, titanium

Over HB 230

20-70 for material harder than

HRB 100 D Diamond 100 Black Pearlitic malleable iron, Thin steel,

Medium case Hardened Steel Over

HB 400 40-77

for intermediate load between A & C Scale

E

1/8" Ball 100 Red Cast Iron, Aluminum and Magnesium alloys, Bearing Metals

Below HB 125

50-100 for hardness lower than HRB 0

F 1/16" Ball 60 Red Thin soft sheet metals Annealed copper alloys

HB 50-120

30-100 for hardness lower

than HRB 0 G 1/16" Ball 150 Red Copper-Nickel-Zinc and Cupro-

Nickel alloys, Malleable irons HB

120-280 30-90

for hardness slightlythan HRB 100

Upper limit=G92 H 1/8" Ball 60 Red Lead, Zinc, Aluminum

Magnesium alloys HB

30-50 70-100

K 1/8" Ball 150 Red Bearing metals, very soft or thin metals

HB 100-200

40-100

L 1/4" Ball 60 Red Plastic materials: Bakelite, Vulcanized Fibre

Variations in hardness Reduced by testing with the

largest indentor Consistent with overall hardness

of the material M 1/4" Ball 100 Red Nylon, Polystyrene,

Flexiglass See Above

P 1/4" Ball 150 Red R 1/2" Ball 60 Red Rigid sheet metal & plate

Materials used for Electrical insulation are tested by M & L

scales

Moulded Finish will give a higher reading than a machined face

S 1/2" Ball 100 Red V 1/2" Ball 150 Red


ASTM Hardness Round Correction Factors

Corrections to be added to test results in the following scales for various diameter parts

Corrections to be added to Rockwell C, A, and D values

Hardness Diameter of Convex Cylindrical Surfaces Reading 1/4 inc 3/8 in 1/2 in 5/8 in 3/4 in 7/8 in 1 in 1-1/4 in 1-1/2 in

6.4 mm 10 mm 13 mm 16 mm 19 mm 22 mm 25 mm 32 mm 38 mm

20 6.0 4.5 3.5 2.5 2.0 1.5 1.5 1.0 1.0 25 5.5 4.0 3.0 2.5 2.0 1.5 1.0 1.0 1.0 30 5.0 3.5 2.5 2.0 1.5 1.5 1.0 1.0 0.5 35 4.0 3.0 2.0 1.5 1.5 1.0 1.0 0.5 0.5 40 3.5 2.5 2.0 1.5 1.0 1.0 1.0 0.5 0.5 45 3.0 2.0 1.5 1.0 1.0 1.0 0.5 0.5 0.5 50 2.5 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5 55 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 60 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0 65 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0 70 1.0 1.0 0.5 0.5 0.5 0.5 0.5 0 0 75 1.0 0.5 0.5 0.5 0.5 0.5 0 0 0 80 0.5 0.5 0.5 0.5 0.5 0 0 0 0 85 0.5 0.5 0.5 0 0 0 0 0 0 90 0.5 0 0 0 0 0 0 0 0

Corrections to be added to Rockwell B, F, and G values Hardness Diameters of Convex Cylindrical Surfaces Reading 1/4 in 3/8 in 1/2 in 5/8 in 3/4 in 7/8 in 1 in 6.4 mm 10mm 13mm 16 mm 19 mm 22 mm 25 mm

0 12.5 8.5 6.5 5.5 4.5 3.5 3.0 10 12.0 8.0 6.0 5.0 4.0 3.5 3.0 20 11.0 7.5 5.5 4.5 4.0 3.5 3.0 30 10.0 6.5 5.0 4.5 3.5 3.0 2.5 40 9.0 6.0 4.5 4.0 3.0 2.5 2.5 50 8.0 5.5 4.0 3.5 3.0 2.5 2.0 60 7.0 5.0 3.5 3.0 2.5 2.0 2.0 70 6.0 4.0 3.0 2.5 2.0 2.0 1.5 80 5.0 3.5 2.5 2.0 1.5 1.5 1.5 90 4.0 3.0 2.0 1.5 1.5 1.5 1.0

100 3.5 2.5 1.5 1.5 1.0 1.0 0.5 When testing cylindrical specimens, the accuracy of the test will be seriously affected by alignment of elevating screw, Vee-anvil, indenters, surface finish, and the straightness of the cylinder. These corrections are approximate only and represent the averages, to the nearest 0.5. Rockwell and Rockwell superficial numbers, of numerous actual observations. The above tables are from ASTM E 18 Reprinted from the Annual Book of STM Standards, copyright American Society for Testing and Materials. 100 Harbor Drive, West Conshohocken , PA 19428-2959


ASTM Hardness Conversion Chart

Rockwell C Hardness Range Approximate Hardness Conversion Numbers for Non-Austenitic Steels, According to ASTM E-140

The Conversion Values contained herein should be considered approximate only and may be inaccurate for specific applications C A D 15N 30N 45N Vickers Knoop Brinell Tensile

150 kgt 60 kgt 100kgt 15kgt 30 kgt 45 kgt Hardness Hardness Hardness Strenght diamond diamond diamond diamond diamond diamond 500gr 3000kgt 1000 lbs/

and over 10mm ball square in 68 85.6 76.9 93.2 84.4 75.4 940 920 .. .. 67 85.0 76.1 92.9 83.6 74.2 900 895 .. .. 66 84.5 75.4 92.5 82.8 73.3 865 870 .. .. 65 83.9 74.5 92.2 81.9 72.0 832 846 (739) 64 83.4 73.8 91.8 81.1 71.0 800 822 (722) 63 82.8 73.0 91.4 80.1 69.9 772 799 (705) 62 82.3 72.2 91.1 79.3 68.8 745 776 (688) 61 81.8 71.5 90.7 78.4 67.7 720 754 (670) 60 81.2 70.7 90.2 77.5 66.6 697 732 (654) 59 80.7 69.9 89.8 76.6 65.5 674 710 (634) 351 58 80.1 69.2 89.3 75.7 64.3 653 690 615 338 57 79.6 68.5 88.9 74.8 63.2 633 670 595 325 56 79.0 67.7 88.3 73.9 62.0 613 650 577 313 55 78.5 66.9 87.9 73.0 60.9 595 630 560 301 54 78.0 66.1 87.4 72.0 59.8 577 612 543 292 53 77.4 65.4 86.9 71.2 58.6 560 594 525 283 52 76.8 64.6 84.4 70.2 57.4 544 576 512 273 51 76.3 63.8 85.9 69.4 56.1 528 558 496 264 50 75.9 63.1 85.5 68.5 55.0 513 542 481 255 49 75.2 62.1 85.0 67.6 53.8 498 526 469 246 48 74.7 61.4 84.6 66.7 52.5 484 510 455 237 47 74.1 60.8 83.9 65.8 51.4 471 495 443 229 46 73.6 60 83.5 64.8 50.3 458 480 432 221 45 73.1 59.2 83.0 64.0 49.0 446 466 421 215 44 72.5 58.5 82.5 63.1 47.8 434 452 409 208 43 72.0 57.7 82.0 62.2 46.7 423 438 400 201 42 71.5 56.9 81.5 61.3 45.5 412 426 390 195 41 70.9 56.2 80.9 60.4 44.3 402 414 381 188 40 70.4 55.4 80.4 59.5 43.1 392 402 371 182 39 69.9 54.6 79.9 58.6 41.9 382 391 362 177 38 69.4 53.8 79.4 57.7 40.8 372 380 353 171 37 58.9 53.1 78.8 56.8 39.6 363 370 344 166 36 68.4 52.3 78.3 55.9 38.4 354 360 336 161 35 67.9 51.5 77.7 55.0 37.2 345 351 327 156 34 67.4 50.8 77.2 54.2 36.1 336 342 319 152 33 66.8 50.0 76.6 53.3 34.9 327 334 311 149 32 66.3 49.2 76.1 52.1 33.7 318 326 301 146 31 65.8 48.4 75.6 51.3 32.5 310 318 294 141 30 65.3 47.7 75.0 50.4 31.3 302 311 286 138 29 64.8 47.0 74.5 49.5 30.1 294 304 279 135 28 64.3 46.1 73.9 48.6 28.9 286 297 271 131 27 63.8 45.2 73.3 47.7 27.8 279 290 264 128 26 63.3 44.6 72.8 46.8 26.7 272 284 258 125 25 62.8 43.8 72.2 45.9 25.5 266 278 253 123 24 62.4 43.1 71.6 45.0 24.3 260 272 247 119 23 62.0 42.1 71.0 44.0 23.1 254 266 243 117 22 61.5 41.6 70.5 43.2 22.0 248 261 237 115 21 61.0 40.9 69.9 42.3 20.7 243 256 231 112 20 60.5 40.1 69.4 41.5 19.6 238 251 226 110

Hardness values in Brackets are outside the range recommended for Brinell testing in ASTM E-10.

The above tables is from ASTM E-110 except values for E-scale and Tensile Strength which are not from or according to ASTM Standards. Reprinted from the Annual Book of ASTM Standards,

Copyright American Society for Testing and Materials, 100 Barr Harbor Drive,West Conshohocken,PA 19428-2959.


ASTM Hardness Minimum Thickness Requirements

Minimum allowable thickness for a corresponding hardness in the respective scales Minimum Minimum - Rockwell - - - Superficial Rockwell - - thickness thickness C A B 15N 30N 45N 15T 30T 45T

in. mm

0.006 0.15 92 0.008 0.20 90 0.010 0.25 88 91 0.012 0.30 83 82 77 86 0.014 0.36 76 78.5 74 81 80 0.016 0.41 86 68 74 72 75 72 71 0.018 0.46 84 66 68 68 64 62 0.020 0.51 82 57 63 55 53 0.022 0.56 69 79 47 58 45 43 0.024 0.61 67 76 94 51 34 31 0.026 0.66 65 71 87 37 18 0.028 0.71 62 67 80 20 4 0.030 0.76 57 60 71 0.032 0.81 52 62 0.034 0.86 45 52 0.036 0.91 37 40 0.038 0.96 28 28 0.040 1.02 20

The above tables are from ASTM E 18.

Reprinted from the Annual Book of ASTM Standards, copyright American Society for Testing and Materials. 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959

hardness te...hardness tester includes standard, la rge and v-shaped anvils for holding small, large...

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