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USA UNS SAE J 405 (1998) , XM-18 Specialsteel Chemical compositions of SAE wrought stainless steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: XM-18
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel XM-18 Austenite UNS USA Chemical compositions of SAE wrought stainless steels

Chemical composition(mass fraction)(wt.%) of the XM-18

C Si Mn P S Cr Ni Mo N
≤0.03 ≤0.75 7.50 -9.00 ≤0.045 ≤0.03 17.5 -22.0 5.00 -7.00 2.00 -3.00 0.25 -0.50

Mechanical Properties of steel grade XM-18

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)
474 (≥) 597 (≥) 22 13 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade XM-18

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
21 - -     0.32 -  
878 789 - 14.3 211   -  
325 - 14 34.2   112 334

Heat Treatment of steel grade XM-18

Heat treated : 1769°C - 1798°C

Technological Curves of steel grade XM-18

Cross Reference Table (Equivalent Grade) of XM-18

Grade Standard Country Application
216LXM-18
XM-18

Relevant standard of XM-18

SAE J 405 (1998) Chemical compositions of SAE wrought stainless steels SAE-J-405--(1998)-.pdf

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