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Crucible Steel 21-4NNb Martensitic Steel

Category Metal , Ferrous Metal , Austenitic , Stainless Steel
Manufacturer Crucible Steel
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Crucible Steel 21-4NNb Martensitic Steel.pdf
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Material Notes:
Information provided by Crucible Specialty Metals.
Mechanical Properties Metric English Comments
Hardness, Brinell <= 285
<= 285
Hardness, Rockwell C <= 42
<= 42
Tensile Strength, Ultimate >= 882.6 MPa
>= 128000 psi
Tensile Strength, Yield >= 559 MPa
>= 81100 psi
Elongation at Break >= 8.0 %
>= 8.0 %
Component Elements Properties Metric English Comments
Carbon, C 0.48 - 0.58 %
0.48 - 0.58 %
Chromium, Cr 20 - 22 %
20 - 22 %
Iron, Fe >= 58.17 %
>= 58.17 %
As Remainder
Manganese, Mn 8.0 - 10 %
8.0 - 10 %
Molybdenum, Mo <= 0.70 %
<= 0.70 %
Nickel, Ni 3.25 - 4.5 %
3.25 - 4.5 %
Niobium, Nb (Columbium, Cb) 2.0 - 3.0 %
2.0 - 3.0 %
Nitrogen, N 0.38 - 0.50 %
0.38 - 0.50 %
Silicon, Si <= 0.45 %
<= 0.45 %
Thallium, Tl <= 0.10 %
<= 0.10 %
Descriptive Properties Value Comments
Heat Treatment, °C 1100-1200 W.Q.
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