7Cr17

7Cr17 Stainless Steels to GB/T 1220 (1992)

7Cr17 - Specification & Application

• GB/T 1220 (1992) - Stainless steel bars
• GB/T 3280 (2007) - Cold rolled stainless steel sheets and plates
• GB/T 4237 (1992) - Hot rolled stainless steel sheets and plates
• GB/T 4239 (1991) - Cold rolled stainless steel and heat resisting steel strips
• GB/T 4356 (2002) - Stainless steel wire rods

Stainless steel bars

Chemical composition(wt.%) of 7Cr17 grade: to GB/T 1220 (1992)

7Cr17 - Detail

7Cr17

Mechanical properties of grade 7Cr17 GB/T 1220 (1992)

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)
725 (≥)	676 (≥)	12	41	43	Solution and Aging, Annealing, Ausaging, Q+T,etc	134

Physical properties of grade 7Cr17 GB/T 1220 (1992)

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
369 (≥)	336 (≥)	42	33	12	Solution and Aging, Annealing, Ausaging, Q+T,etc	421
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
755	785	257