![Hammer vertical downwardsnguyen.hong.hai.free.fr/EBOOKS/SCIENCE AND ENGINEERING... · 2006-11-09 · Schmidt hardness (R] Figure 10.15 Correlation chart for the Schmidt hammer, relating](https://static.fdocuments.in/doc/165x107/5e6e0366441bd61f0c72729d/hammer-vertical-and-engineering-2006-11-09-schmidt-hardness-r-figure-1015.jpg)
Languages
Pages
Legal
HARDNESS VS MINIMUM THICKNESS CHART 55Rockwell
SuperficialHardness Scales
RockwellRegular
Hardness ScalesAny greaterthickness andhardness can besafely tested onindicated scale
Thicknessinches (mm)
N BraleIndenter
BraleIndenter
.006 (0.15)
.008 (0.20)
.010 (0.25)
.012 (0.30)
.014 (0.36)
.016 (0.41)
.018 (0.46)
.020 (0.51)
.022 (0.56)
.024 (0.61)
.026 (0.66)
.028 (0.71)
.030 (0.76)
.032 (0.81)
.034 (0.86)
.036 (0.91)
.038 (0.96)
.040 (1.02)
15N 30N 45N A D C15kgf
30kgf
45kgf
60kgf
100kgf
150kgf
9290
88837668X
XXXXX
XXXXX
X
--
-82
78.57466
5747XXX
XXXXX
X
--
-77747268
6358513720
XXXXX
X
--
---
8684
8279767167
60XXXX
X
--
-----
7775726863
585143XX
X
--
-----
-69676562
5752453728
20
RockwellSuperficial
Hardness Scales
RockwellRegular
Hardness ScalesAny greaterthickness andhardness can besafely tested onindicated scale
Thicknessinches (mm)
1/16 in BallIndenter
1/16 in BallIndenter
.010 (0.25)
.012 (0.30)
.014 (0.36)
.016 (0.41)
.018 (0.46)
.020 (0.51)
.022 (0.56)
.024 (0.61)
.026 (0.66)
.028 (0.71)
.030 (0.76)
.032 (0.81)
.034 (0.86)
.036 (0.91)
.038 (0.96)
.040 (1.02)
15-T 30-T 45-T F B G15kgf
30kgf
45kgf
60kgf
100kgf
150kgf
9186817568
XXXXX
XXXXX
X
--
807264
554534XX
XXXXX
X
---
7162
534331184
XXXXX
X
-----
--
989185
7769XXX
X
-----
--
948780
7162524028
X
-----
--
948776
6859504231
22
X = No minimum hardness. These are approximate numbers only.
HARDENED STEEL AND HARD ALLOYS
80797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120
C A D 15-N 30-N 45-N HV HK HB KSI WMNG
60kg
Brale
100kg
Brale
15 kgN
Brale
Superficial
30 kgN
Brale
45 kgN
Brale10 kg
500 gmandover
3000kg
10 mmball
150kg
1/16"ball
1000 lbs/sq in
1000gm
Vickers Knoop BrinellTensile
StrengthMicro-ficialRockwell
150kg
Brale®
92.091.591.090.590.089.589.088.588.087.086.586.085.685.084.583.983.482.882.381.881.280.780.179.679.078.578.077.476.876.375.975.274.774.173.673.172.572.071.570.970.469.969.468.968.467.967.466.866.365.865.364.664.363.863.362.862.462.061.561.060.5
86.585.584.584.083.082.581.581.080.079.578.578.076.976.175.474.573.873.072.271.570.769.969.268.567.766.966.165.464.663.863.162.161.460.860.059.258.557.756.956.255.454.653.853.152.351.550.850.049.248.447.747.046.145.244.643.843.142.141.640.940.1
92.091.591.090.590.089.088.588.087.086.586.085.084.483.682.881.981.180.179.378.477.576.675.774.873.973.072.071.270.269.468.567.666.765.864.864.063.162.261.360.459.558.657.756.855.955.054.253.352.151.350.449.548.647.746.845.945.044.043.242.341.5
96.596.396.095.895.595.395.094.894.594.394.093.593.292.992.592.291.891.491.190.790.289.889.388.988.387.987.486.986.485.985.585.084.583.983.583.082.582.081.580.980.479.979.478.878.377.777.276.676.175.675.074.573.973.372.872.271.671.070.569.969.4
87.086.585.584.583.582.581.580.579.578.577.576.575.474.273.372.071.069.968.867.766.665.564.363.262.060.959.858.657.456.155.053.852.551.450.349.047.846.745.544.343.141.940.839.638.437.236.134.933.732.531.330.128.927.826.725.524.323.122.020.719.6
NA92.091.090.089.088.087.086.084.583.582.581.0
186517871710163315561478140013231245116010761004940900865832800772746720697674653633613595577560544528513498484471458446434423412402392382372363354345336327318310302294286279272266260254248243238
__________
972946920895870846822799776754732710690670650630612594576558542526510495480466452438426414402391380370360351342334326318311304297290284278272266261256251
NA739722706688670654634615595577560543525512496481469455443432421409400390381371362353344336327319311301294286279271264258253247243237231226
NA351338325313301292283273264255246238229221215208201194188182177171166161156152149146141138135131128125123119117115112110
__________
953949945942938934930926922917913909904900896891887883879874870865861856851847842837832827822817812807802798793788783778773768762757751746741736730725720
NOT
E1
NOT
E2
®
Note1: A 10 mm steel ball was used for 450 BHN and below. A 10 mm carbide ball was used above 450 BHN.
2: The tensile strength relation to hardness is inexact, even for steel, unless it is determined for a specific material.
H A R D N E S S C O N V E R S I O N C H A R T
10643 S. Norwalk Blvd., Santa Fe Springs, CA 90670 800.622.6624www.continentalht.com
“Providing reliable service and consistent workmanship to our customers since 1957”
H A R D N E S S C O N V E R S I O N C H A R T
SOFT STEEL,GREY AND MALLEABLE CAST IRONANDMOSTNON-FERROUSMETALS
The values shown are approximate only and this chart is intended primarily as a reference guide.
1009998979695949392919089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210
B F G 15-T 30-T 45-T HK HBHV KSI WMNA
Superficial
500 gmandover
3000 kg10 kg
60kg
1/16"ball
1000lbs/sq in
1000gm
Knoop 10 mmVickers 136°
TensileStrength
MicroficialRockwell
100kg
1/16"ball
61.560.960.259.558.958.357.657.056.455.855.254.654.053.452.852.351.751.150.650.049.548.948.447.947.346.846.345.845.344.844.343.843.342.842.341.841.440.940.440.039.539.038.638.137.737.236.836.335.935.535.034.634.133.733.332.932.432.031.631.230.730.329.929.529.128.728.227.827.427.026.626.025.525.024.524.324.023.523.022.522.021.521.321.020.520.0NA
82.581.079.077.576.074.072.571.069.067.566.064.062.561.059.057.556.054.052.551.049.047.546.044.042.541.039.037.536.034.532.531.029.528.026.525.023.522.020.519.017.516.014.513.011.510.08.57.05.54.02.5NA
93.192.892.592.191.891.591.290.890.590.289.989.589.288.988.688.287.987.687.386.986.686.386.085.685.385.084.784.384.083.783.483.082.782.482.181.881.481.180.880.580.179.879.579.278.878.578.277.977.577.276.976.676.275.975.675.374.974.674.374.073.673.373.072.772.372.071.771.471.070.770.470.069.369.569.068.868.568.067.867.567.367.066.566.366.065.565.365.064.564.364.063.863.563.062.862.562.061.861.561.060.5
72.971.970.969.968.967.966.965.964.863.862.861.860.859.858.857.856.855.854.853.852.851.850.849.848.847.846.845.844.843.842.841.840.839.838.737.736.735.734.733.732.731.730.729.728.727.726.725.724.723.722.721.720.719.718.717.716.715.714.713.612.611.610.69.68.67.66.65.64.63.62.61.0NA
NA99.699.198.598.097.496.896.295.695.194.593.993.492.892.291.791.190.590.089.488.888.287.787.186.586.085.484.884.383.783.182.682.081.480.880.379.779.178.678.077.476.976.375.775.274.674.073.573.072.572.071.070.570.069.569.068.568.067.066.566.065.565.064.564.063.563.062.061.561.060.560.059.559.058.057.557.0
116114109104102100989492908988868483828180777372706968676665646362616059585756
NA
730725719713707701696690684679674668662656651646640634629624618612607602596592587581576571566561556551546542537532527522517512507502497492487482477472468463458453448444439435430426422417413409404401396392388384380376372369365361357353350346343339335332329325322318314311308304300297293289286283279276272
NOT
E2
NA10099.599.098.097.597.096.095.595.094.593.593.092.592.091.090.590.089.589.088.087.587.086.585.585.084.584.083.582.582.081.581.080.079.579.078.578.077.076.576.075.575.074.073.573.072.572.071.070.570.069.568.568.067.567.066.565.565.064.564.063.562.562.061.561.060.560.059.058.558.057.557.0
E H K
NA10099.598.598.097.096.595.594.594.093.092.091.090.589.588.588.087.086.085.084.583.582.581.581.080.079.078.077.576.575.574.574.073.072.071.070.569.568.568.067.066.065.064.563.562.561.561.060.059.058.057.556.555.554.554.053.052.051.550.549.548.548.047.046.045.044.543.542.541.541.040.039.038.037.536.535.535.034.033.032.031.530.529.529.028.027.026.025.524.523.523.022.021.0
150kg
1/16"ball
60kg
Brale
100kg
1/8"ball
60kg
1/8"ball
150kg
1/8"ball
30 kg1/16"ball
15 kg1/16"ball
45 kg1/16"ball
NA10099.599.098.898.598.097.897.597.096.596.396.095.595.395.094.594.394.093.593.092.892.592.091.891.591.090.590.390.089.589.389.088.588.087.887.587.0
25124624123623122622121621120620119619218818418017617317016716416115815515215014714514314113913713513313112912712512412212011811711511411211111010910810710610510410310210110099989796959493929190898887878685848382828181807978787776757574737271717069696968686363
83.182.581.881.180.479.879.178.477.877.176.475.875.174.473.873.172.471.871.170.469.769.168.467.767.166.465.765.164.463.763.162.461.761.060.459.759.058.457.757.056.455.755.054.453.753.052.451.751.050.349.749.048.347.747.046.345.745.044.343.743.042.341.641.040.339.639.038.337.637.036.335.634.534.033.032.532.031.030.529.529.028.527.527.026.025.525.024.023.523.022.021.520.520.019.518.518.017.016.516.015.0
Brinell
HB
500 kg10 mm
ball
20119518918417917517116716316015715415114814514214013713513313012812612412212011811611411211010910710610410210199989695949291908987868584838281808079787776757574737272717069696867666665656464636262616160605959595858575757565655555554545453
240234228222216210205200195190185180176172169165162159156153150147144141139137135132130127125123121119117116114112110108107106104103101100NA
Brale Diamond IndenterDiameter of Specimen - inches (mm)
ObservedReading
908580
757065
605550
454035
302520
Scales C, D, A
1/8(3.2)
NA
1/4(6.4)
0.50.50.5
1.01.01.5
1.52.02.5
3.03.54.0
5.05.56.0
3/8(10)
00.50.5
0.51.01.0
1.01.52.0
2.02.53.0
3.54.04.5
1/2(13)
00.50.5
0.50.51.0
1.01.01.5
1.52.02.0
2.53.03.5
5/8(16)
00
0.5
0.50.50.5
0.51.01.0
1.01.51.5
2.02.52.5
3/4(19)
00
0.5
0.50.50.5
0.50.51.0
1.01.01.5
1.52.02.0
7/8(22)
000
0.50.50.5
0.50.50.5
1.01.01.0
1.51.51.5
1(25)
000
00.50.5
0.50.50.5
0.51.01.0
1.01.01.5
1-1/4(32)
000
000
00.50.5
0.50.50.5
1.01.01.0
1-1/2(38)
000
000
00
0.5
0.50.50.5
0.51.01.0
N Brale Diamond IndenterDiameter of Specimen - inches (mm)
ObservedReading
908580
757065
605550
454035
302520
Scales 15-N, 30-N, 45-N
1/8(3.2)
00.51.0
1.52.02.5
3.03.53.5
4.04.55.0
5.55.56.0
1/4(6.4)
00.50.5
1.01.01.5
1.52.02.0
2.02.52.5
3.03.03.0
3/8(10)
00.50.5
0.51.01.0
1.01.51.5
1.51.52.0
2.02.02.0
1/2(13)
00.50.5
0.50.50.5
1.01.01.0
1.01.51.5
1.51.51.5
5/8(16)
00
0.5
0.50.50.5
1.01.01.0
1.01.01.0
1.51.51.5
3/4(19)
000
0.50.50.5
0.50.51.0
1.01.01.0
1.01.51.5
7/8(22)
000
00.50.5
0.50.51.0
1.01.01.0
1.01.51.5
1(25)
000
00.50.5
0.50.50.5
1.01.01.0
1.01.01.5
1-1/4(32)
NA
1/16 in Ball IndenterDiameter of Specimen - inches (mm)
ObservedReading
1009080
706050
403020
100
Scales B, F, G
1/8(3.2)
NA
1/4(6.4)
3.54.05.0
6.07.08.0
9.010.011.0
12.012.5
3/8(10)
2.53.03.5
4.05.05.5
6.06.57.5
8.08.5
1/2(13)
1.52.02.5
3.03.54.0
4.55.05.5
6.06.5
5/8(16)
1.51.52.0
2.53.03.5
4.04.54.5
5.05.5
3/4(19)
1.01.51.5
2.02.53.0
3.03.54.0
4.04.5
7/8(22)
1.01.51.5
2.02.02.5
2.53.03.5
3.53.5
1(25)
0.51.01.5
1.52.02.0
2.52.53.0
3.03.0
1-1/4(32)
NA
1-1/2(38)
NA
1-1/2(38)
NA
1/16 in Ball IndenterDiameter of Specimen - inches (mm)
ObservedReading
908070
605040
3020
Scales 15-T, 30-T, 45-T
1/8(3.2)
1.53.05.0
6.58.5
1/4(6.4)
1.02.03.5
4.55.56.5
7.59.0
3/8(10)
1.01.52.5
3.04.04.5
5.06.0
1/2(13)
0.51.52.0
2.53.03.5
3.54.5
5/8(16)
0.51.01.5
2.02.53.0
3.54.5
3/4(19)
0.51.01.0
1.52.02.5
2.53.0
7/8(22)
0.51.01.0
1.52.02.0
2.02.0
1(25)
0.50.51.0
1.51.52.0
2.02.0
1-1/4(32)
NA
1-1/2(38)
NA
10.0
11.513.0
These corrections are approximate only and represent the averages to thenearest 1/2 Rockwell number.
CYLINDRICAL CORRECTION CHART 53Cylindrical work corrections to be added to observed
Rockwell number for scales indicated
Top Related