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America SAE XM-21 Chemical compositions of SAE wrought stainless steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: XM-21 / XM-21
Category Grade Standard Region/Area Standard Content
Metals XM-21 SAE J 405 America Chemical compositions of SAE wrought stainless steels

Chemical composition(mass fraction)(wt.%) of the XM-21

Element Min Max Similar
Si - 0.7500 -
S - 0.0300 -
P - 0.0450 -
Ni 8.0000 10.5000 -
N 0.1600 0.3000 -
Mn - 2.0000 -
Cr 18.0000 19.0000 -
C - 0.0800 -

Mechanical Properties of steel grade XM-21

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
422 (≥) 139 (≥) 23 12 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical Properties of steel grade XM-21

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
22 - -     0.12 -  
861 116 - 22.3 331   -  
849 - 34 43.2   133 142

Heat Treatment of steel grade XM-21

Heat treated : 1596°C - 1261°C

Technological Curves of steel grade XM-21

Cross Reference Table (Equivalent Grade) of XM-21

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