Grade21

This page provides Grade21 datasheet, Grade21 mechanical properties, chemical element Grade21, technical specifications of Grade21 steel material properties. Grade21 performance specifications.

AISI Grade21
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy Grade21 AISI USA
ASTM 11Q
ICI 4620
ASTM 12Q
ICI 6150
ASTM 13Q
ICI 8620
ICI 8630
ASTM 14Q
ASTM 15A
ICI 52100
Datasheet for:Steel Grades:Special Alloy:Grade21

Chemical composition(mass fraction)(wt.%) of the Grade21

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) B(%) Other(%)
0.20-0.30 Max 1.00 Max 1.00 Max 0.040 Max 0.040 25.0-29.0 1.75-3.75 5.0-6.0 Max 0.007 Fe Max 3.00

Mechanical properties / Mechanische Eigenschaften / Caracteristiques mecaniques of grade Grade21

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)
541 (≥) 928 (≥) 12 14 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 422
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
14 - -     0.12 -  
226 775 - 21.3 141   -  
466 - 13 43.2   443 241
Heat treated : 1124°C - 1719°C
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
Grade21 AISI USA
Grade21

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Grade21 can be supplied as steel plate/ sheet, round steel bar, steel tube/pipe, steel stripe, steel billet, steel ingot, steel wire rods. electroslag, forged ring/ block,etc.
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