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Crucible Steel 431 Chromium Steel

Category Metal , Ferrous Metal , Stainless Steel , T 400 Series Stainless Steel
Manufacturer Crucible Steel
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Crucible 431 is a nickel bearing chromium steel which can be treated to exceptionally high physical properties. In the heat treated conditions, its corrosion resistance is superior to similar martensitic types. This grade is ferro-magnetic when annealed or heat treated. Because it is characteristically a two phase alloy, the normal structure contains ferrite and martensite. However depending upon application, the chemistry can be balanced to provide an essentially ferrite-free structure and higher mechanical properties. Information provided by Crucible Specialty Metals.
Physical Properties Metric English Comments
Specific Gravity 7.77 g/cc
7.77 g/cc
7.77 g/cc
7.77 g/cc
Mechanical Properties Metric English Comments
Hardness, Brinell 260
260
260
260
Tensile Strength, Ultimate 862 MPa
125000 psi
862 MPa
125000 psi
Tensile Strength, Yield 655 MPa

@Strain 0.200 %
95000 psi

@Strain 0.200 %
655 MPa

@Strain 0.200 %
95000 psi

@Strain 0.200 %
Elongation at Break 20 %
20 %
in 2"
20 %
20 %
in 2"
Reduction of Area 55 %
55 %
55 %
55 %
Modulus of Elasticity 200 GPa
29000 ksi
200 GPa
29000 ksi
Izod Impact Unnotched 67.8 J
50.0 ft-lb
67.8 J
50.0 ft-lb
Thermal Properties Metric English Comments
CTE, linear 11.7 µm/m-°C

@Temperature 0.000 - 100 °C
6.50 µin/in-°F

@Temperature 32.0 - 212 °F
12.1 µm/m-°C

@Temperature 0.000 - 316 °C
6.70 µin/in-°F

@Temperature 32.0 - 600 °F
Specific Heat Capacity 0.460 J/g-°C

@Temperature 0.000 - 100 °C
0.110 BTU/lb-°F

@Temperature 32.0 - 212 °F
0.460 J/g-°C

@Temperature 0.000 - 100 °C
0.110 BTU/lb-°F

@Temperature 32.0 - 212 °F
Thermal Conductivity 20.23 W/m-K

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

@Temperature 200 °F
20.23 W/m-K

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

@Temperature 200 °F
Melting Point 1430 - 1480 °C
2600 - 2700 °F
1430 - 1480 °C
2600 - 2700 °F
Solidus 1430 °C
2600 °F
1430 °C
2600 °F
Liquidus 1480 °C
2700 °F
1480 °C
2700 °F
Component Elements Properties Metric English Comments
Carbon, C <= 0.20 %
<= 0.20 %
Chromium, Cr 15 - 17 %
15 - 17 %
Iron, Fe >= 78.23 %
>= 78.23 %
As Remainder
Manganese, Mn <= 1.0 %
<= 1.0 %
Nickel, Ni 1.25 - 2.5 %
1.25 - 2.5 %
Phosphorous, P <= 0.040 %
<= 0.040 %
Silicon, Si <= 1.0 %
<= 1.0 %
Sulfur, S <= 0.030 %
<= 0.030 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000720 ohm-cm

@Temperature 23.0 °C
0.0000720 ohm-cm

@Temperature 73.4 °F
0.0000720 ohm-cm

@Temperature 23.0 °C
0.0000720 ohm-cm

@Temperature 73.4 °F
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