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AK Steel 420HC Martensitic Stainless steel

Category Metal , Ferrous Metal , Martensitic , Stainless Steel , T 400 Series Stainless Steel
Manufacturer AK Steel
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
AK Steel 420 provides corrosion resistance similar to Type 410 martensitic stainless steel plus increased strength and hardness. It is magnetic in both the annealed and hardened conditions. Maximum corrosion resistance is attained only in the fully hardened of fully hardened and stress relieved condition. It is never used in the annealed condition. Typical uses include cutlery, surgical and dental instruments, scissors, tapes and straight edges. The alloy is not normally used at temperatures exceeding 800°F due to rapid softening and loss of corrosion resistance.Information provided by AK Steel
Physical Properties Metric English Comments
Density 7.74 g/cc
0.280 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell B 88
88
Annealed
Hardness, Rockwell C 55
55
Hardened and Stress Relieved
Tensile Strength, Ultimate 586 MPa
85000 psi
Annealed
1586 MPa
230000 psi
Hardened and Stress Relieved
Tensile Strength, Yield 276 MPa

@Strain 0.200 %
40000 psi

@Strain 0.200 %
Annealed
1344 MPa

@Strain 0.200 %
194900 psi

@Strain 0.200 %
Hardened and Stress Relieved
Elongation at Break 8.0 %
8.0 %
in 2 inches, Hardened and Stress Relieved
25 %
25 %
in 2 inches, Annealed
Modulus of Elasticity 200 GPa
29000 ksi
Thermal Properties Metric English Comments
CTE, linear 10.2 µm/m-°C

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

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

@Temperature <=649 °C
6.72 µin/in-°F

@Temperature <=1200 °F
Specific Heat Capacity 0.460 J/g-°C

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

@Temperature 32.0 - 212 °F
Thermal Conductivity 24.9 W/m-K
173 BTU-in/hr-ft²-°F
Component Elements Properties Metric English Comments
Carbon, C >= 0.15 %
>= 0.15 %
Chromium, Cr 12 - 14 %
12 - 14 %
Iron, Fe 83.78 - 87.85 %
83.78 - 87.85 %
As Remainder
Manganese, Mn <= 1.0 %
<= 1.0 %
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 0.0000550 ohm-cm
0.0000550 ohm-cm
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