Standard:
GB / T 1220-1992
Features:
1Cr17Ni7 stainless steel with high strength by cold working. Railway vehicles, conveyor belts, bolts,

Nuts.
Chemical composition:
Carbon C: ≤ 0.15 1cr17ni7
     Si Si: ≤ 1.00
Manganese Mn: ≤ 2.00
  Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: 16.00 ~ 18.00
Ni-Ni: 6.00 ~ 8.00
Mechanical properties:
Tensile strength σb (MPa): ≥ 520
  Conditions yield strength σ0.2 (MPa): ≥ 205
  Elongation δ5 (%): ≥ 40
Reduction of area ψ (%): ≥ 60
Hardness: ≤ 187HB; ≤ 90HRB; ≤ 200HV
Heat treatment
Standard heat treatment: solution 1010 ~ 1150 ℃ fast-cooling.
  Microstructure: Organizing for the austenitic type.
  ● Delivery status: normal to heat treatment delivery, the treatment types specified in the contract

; Not indicated, according to the heat treatment state of delivery.