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ISO 20a

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ISO X5CrNiMo17-12-3 ISO X6CrNiMoTi17-12-2
#20a

Description

ISO ISO ISO 20a ISO standard thermal deformation of stainless steel and ISO 20a Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: ISO 20a
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy ISO 20a ISO ISO ISO standard thermal deformation of stainless steel
ISO 24
ISO X2CrNiMoN17-11-2
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

Chemical composition(mass fraction)(wt.%) of the ISO 20a

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) N(%)
Max 0.070 Max 1.00 Max 2.00 Max 0.045 Max 0.030 16.5-18.5 10.5-13.0 2.50-3.00 Max 0.11

Mechanical Properties of steel grade ISO 20a

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)
487 (≥) 691 (≥) 42 22 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 412

Physical Properties of steel grade ISO 20a

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 - -     0.11 -  
457 573 - 12.3 424   -  
155 - 23 32.2   234 213

Heat Treatment of steel grade ISO 20a

Heat treated : 1873°C - 1955°C

Technological Curves of steel grade ISO 20a

Cross Reference Table (Equivalent Grade) of ISO 20a

Grade Standard Country Application
20a ISO ISO ISO standard thermal deformation of stainless steel
ISO 20a ISO ISO ISO standard thermal deformation of stainless steel
ML20Al GBT China China structural steel and alloy steel
SWRCH20A CNS China China Taiwan Structural steel
STKM20A CNS China China Taiwan Structural steel
1Cr20Al3 GBT China High resistance alloys for electrical heating
ISO X5CrNiMo17-12-3 ISO X6CrNiMoTi17-12-2
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