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GB 1Cr17Ni7 Details

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1Cr17Ni7 Application:High strength after cold forming. Used in railway vehicle, conveyor belt, bolt and nut, etc

Category Type Grade Microstructure Designations
Grades Stainless Steels 1Cr17Ni7 Austenite China - GB , GB/T 1220 (1992) - Stainless steel bars
GB/T 3280 (2007) - Cold rolled stainless steel sheets and plates
GB/T 4231 (1993) - Cold rolled stainless steel strips for springs
GB/T 4239 (1991) - Cold rolled stainless steel and heat resisting steel strips

Chemical composition(wt.%) of 1Cr17Ni7 grade: GB/T 1220 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.15
Si - 1.00
Mn - 2.00
P - 0.035
S - 0.030
Ni 6.00 8.00
Cr 16.00 18.00
Austenitic stainless steel. Grade 1Cr17Ni7 was replaced by new designation 12Cr17Ni7 according to GB/T 20878 (2007)

Mechanical properties of grade 1Cr17Ni7 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)
499 (≥) 823 (≥) 43 42 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 212

Physical properties of grade 1Cr17Ni7 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
816 (≥) 278 (≥) 34 14 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 321
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
576 176 448

1Cr17Ni7 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
1Cr17Ni7 GB China
High strength after cold forming. Used in railway vehicle, conveyor belt, bolt and nut, etc

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