ISO H18

ISO H18 Stainless Steels to ISO 15510 (2010)

ISO H18 - Specification & Application

• ISO 15510 (2010) - Stainless steels -- Chemical composition
• ISO 16143-3 (2005) - Stainless steels for general purposes -- Part 3: Wire
• ISO 4955 (2005) - Heat-resistant steels
• ISO 9328-5 - Steel plates and strips for pressure purposes - Technical delivery conditions - Part 5: Weldable fine grain steels, thermomechanically rolled
• ISO 9328-7 (2011) - Steel flat products for pressure purposes - Technical delivery conditions - Part 7: Stainless steels

Steel flat products for pressure purposes - Technical delivery conditions - Part 7: Stainless steels

Chemical composition(wt.%) of ISO H18 grade: to ISO 15510 (2010)

ISO H18 - Detail

Steel flat products for pressure purposes - Technical delivery conditions - Part 7: Stainless steels

Mechanical properties of grade ISO H18 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)
354 (≥)	872 (≥)	31	11	32	Solution and Aging, Annealing, Ausaging, Q+T,etc	421

Physical properties of grade ISO H18 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
679 (≥)	641 (≥)	21	31	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	144
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
121	387	391