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ISO 21

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

Description

International ISO ISO 15510 (2010), ISO 16143-1 (2004), ISO 16143-2 (2004), ISO 16143-3 (2005), ISO 9328-7 (2011), ISO/TS 15510 (2003), ISO 21 Specialsteel Stainless steels - Chemical composition and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: ISO 21
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel ISO 21 Austenite ISO International Stainless steels - Chemical composition

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

C Si Mn P S Cr Ni Mo N Ti
≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 16.50 -18.50 10.50 -13.50 2.00 -2.50 ≤ ≥ 5×C％ -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)
855 (≥) 792 (≥) 42 34 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

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
32 - -     0.33 -  
255 889 - 14.3 134   -  
188 - 21 23.2   234 212

Heat Treatment of steel grade ISO 21

Heat treated : 1582°C - 1791°C

Technological Curves of steel grade ISO 21

Relevant standard of ISO 21

ISO 15510 (2010) Stainless steels -- Chemical composition ISO-15510-(2010).pdf
ISO 16143-1 (2004) Stainless steels for general purposes -- Part 1: Flat products ISO-16143-1-(2004).pdf
ISO 16143-2 (2004) Stainless steels for general purposes -- Part 2: Semi-finished products, bars, rods and sections ISO-16143-2-(2004).pdf
ISO 16143-3 (2005) Stainless steels for general purposes -- Part 3: Wire ISO-16143-3-(2005).pdf
ISO 9328-7 (2011) Steel flat products for pressure purposes - Technical delivery conditions - Part 7: Stainless steels ISO-9328-7-(2011).pdf
ISO/TS 15510 (2003) Stainless steels - Chemical composition ISO-TS-15510-(2003).pdf
X6CrNiMoTi17-12-2 X6CrNiMoNb17-12-2
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