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Crucible Steel S7 (AISI S7) Tool Steel

Category Metal , Ferrous Metal , Tool Steel , Mold Steel
Manufacturer Crucible Steel
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Crucible Steel S7 (AISI S7) Tool Steel.pdf
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Material Notes:
Crucible S7 is a shock resisting tool steel with excellent toughness and high strength, along with low to medium wear resistance. It has been widely used for many years to make chisels and punches which undergo shock loading, and has found increasing use for small plastic molds. S7 is easy to machine in the annealed condition and can be readily heat treated. It is deep hardening and in many cases (except for large sections) it can be air quenched, exhibiting minimal distortion on hardening. Due to its relatively high attainable hardness (HRC 58/60) it offers high compressive strength (resistance to deformation) while retaining good toughness. Crucible S7 is a versatile tool steel for both cold and warm shock applications.Information provided by Crucible Specialty Metals.
Physical Properties Metric English Comments
Density 7.83 g/cc
0.283 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 187 - 220
187 - 220
Annealed
Hardness, Rockwell C 58 - 60
58 - 60
Modulus of Elasticity 207 GPa
30000 ksi
Charpy Impact 125 J
92.2 ft-lb
Austenitizing Temperature- 955°C
Thermal Properties Metric English Comments
CTE, linear 12.6 µm/m-°C

@Temperature 20.0 - 205 °C
7.00 µin/in-°F

@Temperature 68.0 - 401 °F
13.7 µm/m-°C

@Temperature 20.0 - 540 °C
7.61 µin/in-°F

@Temperature 68.0 - 1000 °F
Thermal Conductivity 28.5 W/m-K

@Temperature 95.0 °C
198 BTU-in/hr-ft²-°F

@Temperature 203 °F
Shrinkage -0.100 %

@Temperature 204 °C
-0.100 %

@Temperature 400 °F
Tempered at 400°F
Component Elements Properties Metric English Comments
Carbon, C 0.55 %
0.55 %
Chromium, Cr 3.25 %
3.25 %
Iron, Fe 93.5 %
93.5 %
As Remainder
Manganese, Mn 0.70 %
0.70 %
Molybdenum, Mo 1.4 %
1.4 %
Silicon, Si 0.35 %
0.35 %
Vanadium, V 0.25 %
0.25 %
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