ISO 21

ISO 21 Stainless Steels to ISO 15510 (2010)

ISO 21 - Specification & Application

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

Stainless steels - Chemical composition

Chemical composition(wt.%) of ISO 21 grade: to ISO 15510 (2010)

ISO 21 - Detail

Stainless steels - Chemical composition

Mechanical properties of grade ISO 21 ISO 15510 (2010)

Proof strength Rp0.2 (MPa)	Tensile strength Rm (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
236 (≥)	629 (≥)	13	33	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	411

Physical properties of grade ISO 21 ISO 15510 (2010)

Property	Density kg/dm3	Temperature T °C/F	Specific heat J / kgK	Thermal conductivity W/mK	Electric resistance µΩ·cm	Modulus of elasticity kN/mm2	Expansion rate
264 (≥)	273 (≥)	33	41	33	Solution and Aging, Annealing, Ausaging, Q+T,etc	431
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
449	626	613