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X 7 CrNiCo 21-20-20

Favorite Datasheet

Germany DIN X7CrNiCo21-20-20 High alloyed NiCrMoMn heat resisting steel and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X7CrNiCo21-20-20 / X 7 CrNiCo 21-20-20
Category Grade Standard Region/Area Standard Content
Metals X 7 CrNiCo 21-20-20 -- Germany High alloyed NiCrMoMn heat resisting steel

Chemical composition(mass fraction)(wt.%) of the X 7 CrNiCo 21-20-20

Element Min Max Similar
W 2.0000 3.0000 -
Si - 1.0000 -
S - 0.0200 -
P - 0.0300 -
Ni 19.0000 21.0000 -
Nb 0.7500 1.2500 -
N 0.1000 0.2000 -
Mo 2.5000 3.5000 -
Mn 1.0000 2.0000 -
Cr 20.0000 22.5000 -
Co 18.5000 21.0000 -
C - 0.1000 -

Mechanical Properties of steel grade X 7 CrNiCo 21-20-20

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)
167 (≥) 242 (≥) 33 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical Properties of steel grade X 7 CrNiCo 21-20-20

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
32 - -     0.43 -  
237 915 - 34.3 133   -  
244 - 11 23.2   341 424

Heat Treatment of steel grade X 7 CrNiCo 21-20-20

Heat treated : 1222°C - 1683°C

Technological Curves of steel grade X 7 CrNiCo 21-20-20

Cross Reference Table (Equivalent Grade) of X 7 CrNiCo 21-20-20

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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