A 959 Type XM-21 Stainless Steels to A 959 (2011)

A 959 Type XM-21 - Specification & Application

  • A 959 (2011) - Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Chemical composition(wt.%) of A 959 Type XM-21 grade: to A 959 (2011)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 18.0 20.0
Ni 8.00 10.5
N 0.16 0.30

A 959 Type XM-21 - Detail

Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Mechanical properties of grade A 959 Type XM-21 A 959 (2011)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
925 (≥) 859 (≥) 43 13 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical properties of grade A 959 Type XM-21 A 959 (2011)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
585 (≥) 789 (≥) 34 33 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 341
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
251 154 396

Equivalent Products

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