China CNS CNS 631-CPS CNS standard springs made of cold rolled stainless steel and CNS 631-CPS Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Special Alloy | CNS 631-CPS | CNS | China | CNS standard springs made of cold rolled stainless steel | 
| CNS 440A | |||||
| CNS 440B | |||||
| CNS 440C | |||||
| CNS 440F | |||||
| CNS 630 | |||||
| CNS 631 | |||||
| CNS 305J1 | |||||
| CNS 301-CPS | |||||
| CNS 304-CPS | |||||
| CNS 420J2-CPS | 
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | Al(%) | 
|---|---|---|---|---|---|---|---|
| Max 0.09 | Max 1.00 | Max 1.00 | Max 0.040 | Max 0.030 | 16.0-18.0 | 6.50-7.50 | 0.75-1.50 | 
| Yield Rp0.2 (MPa) | Tensile Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) | 
|---|---|---|---|---|---|---|
| 769 (≥) | 537 (≥) | 44 | 32 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 141 | 
| Temperature (°C) | Modulus of elasticity (GPa) | Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) | Specific thermal capacity (J/kg·°C) | Specific electrical resistivity (Ω mm²/m) | Density (kg/dm³) | Poisson’s coefficient, ν | 
|---|---|---|---|---|---|---|---|
| 44 | - | - | 0.12 | - | |||
| 188 | 891 | - | 33.3 | 231 | - | ||
| 843 | - | 14 | 31.2 | 112 | 123 | 
Heat treated : 1953°C - 1984°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| SUS631-CPS | JIS | Japan | stainless steel | 
| CNS 631-CPS | CNS | China | CNS standard springs made of cold rolled stainless steel | 
| 631-CPS | CNS | China | China Taiwan Stainless steel | 
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