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| ITEM | Standard Number | Descriptions |
|---|---|---|
| 1 | BS 2HR 501 (1973) | Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy cold drawn wire for springs (nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) |
| 2 | BS 3HR 501 (2011) | Specification for nickel-chromium-cobalt-titanium- aluminium heat-resisting alloy cold drawn wire for springs and springs (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.13 | |||
| Si | 1.00 | |||
| Mn | 1.00 | |||
| P | ||||
| S | 0.015 | |||
| Cr | 18.00 | 21.00 | ||
| Ni | remaining | |||
| Mo | ||||
| Co | 15.00 | 21.00 | ||
| Ti | 2.00 | 3.00 | ||
| Fe | 1.50 | |||
| Al | 1.00 | 2.00 | ||
| Cu | 0.20 | |||
| Zr | 0.15 | |||
| B | 0.020 | |||
| Bi | 0.0001 | |||
| Pb | 0.002 | |||
| Ag | 0.0005 |
| Tensile strength | 815～642 | σb/MPa |
| Yield Strength | 095 | σ 0.2 ≥/MPa |
| Elongation | 06 | δ5≥(％) |
| ψ | - | ψ≥(％) |
| Akv | - | Akv≥/J |
| HBS | 740～192 | - |
| HRC | 30 | - |
| Thermal expansion | 84-05 | e-6/K |
| Thermal conductivity | 73-57 | W/m.K |
| Specific heat | 450-460 | J/kg.K |
| Melting temperature | 6045-2456 | 째C |
| Density | 5289-0286 | kg/m3 |
| Resistivity | 0.50-0.60 | Ohm.mm2/m |
| Steel Grade | Specification | Processing range(mm) |
| 2HR501 Stainless Steels | Round Bar and Hollow Bar | Φ1 to Φ2000 |
| Square and Flat Steel | Φ10 to Φ100 | |
| Plate and Sheet | 0.08-800(Thickness)*10-1500(Width)*Length | |
| Tube or Pipe | OD:Φ4-410; WT:1-35 mm; Lenght:10-12000 | |
| Coil and Strip Steel | THK:0.1mm Width:1500mm | |
| Forged | Ring/Cylindrical/Disk |