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ISO 21

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ISO X6CrNiMoTi17-12-2 ISO X6CrNiMoNb17-12-2
#21

Description

ISO ISO ISO 21 ISO standard thermal deformation of stainless steel and ISO 21 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: ISO 21
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy ISO 21 ISO ISO ISO standard thermal deformation of stainless steel
ISO 19N
ISO X2CrNiMoN17-11-3
ISO 19aN
ISO X2CrNiMoN18-12-4
ISO X2CrNiMoN18-15-5
ISO X5CrNiMo17-12-2
ISO 20
ISO X5CrNiMo17-12-3
ISO 20a
ISO X6CrNiMoTi17-12-2

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

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) Ti(%)
Max 0.080 Max 1.00 Max 2.00 Max 0.045 Max 0.030 16.5-18.5 10.5-13.5 2.00-2.50 5xC%≤Ti≤0.60

Mechanical Properties of steel grade ISO 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)
857 (≥) 274 (≥) 32 14 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade ISO 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
34 - -     0.24 -  
433 649 - 14.3 214   -  
628 - 11 13.2   342 442

Heat Treatment of steel grade ISO 21

Heat treated : 1698°C - 1413°C

Technological Curves of steel grade ISO 21

Cross Reference Table (Equivalent Grade) of ISO 21

Grade Standard Country Application
Q215 China Engineering and welding
Q215 B China Engineering and welding
UNS G10210 UNS USA General use carbon steel bar
ASTM 1021 ASTM USA General use carbon steel bar
H21 ASTM USA Alloy tool steel
T20821 UNS USA Alloy tool steel
Stellite 21 Stellite alloy
X210Cr12 DIN Germany Cold working alloy tool steel
1.2101 DIN Germany Cold working alloy tool steel
1.2103 DIN Germany Cold working alloy tool steel
1.2108 DIN Germany Cold working alloy tool steel
1.2109 DIN Germany Cold working alloy tool steel
1.2127 DIN Germany Cold working alloy tool steel
1.2129 DIN Germany Cold working alloy tool steel
21MnCr5 DIN Germany Cold working alloy tool steel
1.2162 DIN Germany Cold working alloy tool steel
1.2210 DIN Germany Cold working alloy tool steel
X210CrW12 DIN Germany Cold working alloy tool steel
1.2721 DIN Germany Cold working alloy tool steel
X210CrCoW12 DIN Germany Cold working alloy tool steel
ISO X6CrNiMoTi17-12-2 ISO X6CrNiMoNb17-12-2
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