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Crucible Steel PEERLESS A Tool Steel, AISI H21

Category Metal , Ferrous Metal , Tool Steel
Manufacturer Crucible Steel
Trade Name PEERLESS
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Crucible Steel PEERLESS A Tool Steel, AISI H21.pdf
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Material Notes:
Peerless A is designed for tools which will run hot, at operating temperatures between about 600F and 1100F. The tools should not be water cooled in service, due to a high risk of thermal shock. Peerless A offers wear resistance approaching H19, with slightly better toughness at high temperature (over about 600F). It may be used at tool temperatures up to 1100F, with brief exposures to 1200/1250F.Information provided by Crucible Industries
Physical Properties Metric English Comments
Density 8.28 g/cc
0.299 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 207 - 241
207 - 241
Hardness, Rockwell C 35

@Tempering Temp. 677 °C
 35

@Tempering Temp. 1250 °F
 oil quenched from 2150°F then tempered
41

@Tempering Temp. 649 °C
 41

@Tempering Temp. 1200 °F
 oil quenched from 2150°F then tempered
45

@Tempering Temp. 621 °C
 45

@Tempering Temp. 1150 °F
 oil quenched from 2150°F then tempered
51

@Tempering Temp. 538 °C
 51

@Tempering Temp. 1000 °F
 oil quenched from 2150°F then tempered
52

@Tempering Temp. 593 °C
 52

@Tempering Temp. 1100 °F
 oil quenched from 2150°F then tempered
53

@Tempering Temp. 566 °C
 53

@Tempering Temp. 1050 °F
 oil quenched from 2150°F then tempered
Modulus of Elasticity 207 GPa
30000 ksi
Charpy Impact 6.78 J

@Temperature 21.1 °C
 5.00 ft-lb

@Temperature 70.0 °F
 50 HRC; V-notch
10.8 J

@Temperature 21.1 °C
 8.00 ft-lb

@Temperature 70.0 °F
 38 HRC; V-notch
16.3 J

@Temperature 260 °C
 12.0 ft-lb

@Temperature 500 °F
 50 HRC; V-notch
21.7 J

@Temperature 427 °C
 16.0 ft-lb

@Temperature 800 °F
 50 HRC; V-notch
43.4 J

@Temperature 260 °C
 32.0 ft-lb

@Temperature 500 °F
 38 HRC; V-notch
47.5 J

@Temperature 427 °C
 35.0 ft-lb

@Temperature 800 °F
 38 HRC; V-notch
Thermal Properties Metric English Comments
CTE, linear 10.3 µm/m-°C

@Temperature 21.1 - 93.3 °C
 5.70 µin/in-°F

@Temperature 70.0 - 200 °F
11.0 µm/m-°C

@Temperature 21.1 - 204 °C
 6.10 µin/in-°F

@Temperature 70.0 - 400 °F
12.2 µm/m-°C

@Temperature 21.1 - 427 °C
 6.80 µin/in-°F

@Temperature 70.0 - 800 °F
13.1 µm/m-°C

@Temperature 21.1 - 649 °C
 7.30 µin/in-°F

@Temperature 70.0 - 1200 °F
14.0 µm/m-°C

@Temperature 260 - 649 °C
 7.80 µin/in-°F

@Temperature 500 - 1200 °F
14.6 µm/m-°C

@Temperature 427 - 649 °C
 8.10 µin/in-°F

@Temperature 800 - 1200 °F
Thermal Conductivity 2.23 W/m-K

@Temperature 93.3 °C
 15.5 BTU-in/hr-ft²-°F

@Temperature 200 °F
2.45 W/m-K

@Temperature 316 °C
 17.0 BTU-in/hr-ft²-°F

@Temperature 600 °F
Component Elements Properties Metric English Comments
Carbon, C 0.30 %
0.30 %
Chromium, Cr 3.3 %
3.3 %
Iron, Fe 86.5 %
86.5 %
as balance
Manganese, Mn 0.30 %
0.30 %
Silicon, Si 0.34 %
0.34 %
Tungsten, W 9.0 %
9.0 %
Vanadium, V 0.25 %
0.25 %
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