ASTM A453 Grade 660 A286 W 1.4980
A453 Steel Grade 660 – ALLOY 286 – W 1.4980 is a precipitation-hardenable alloy by aging heat treatment; it is a high-strength steel suitable for high-temperature applications and in corrosive environments. The corrosion resistance of this alloy is excellent up to 704 °C. Up to 816 °C, the oxidation resistance is similar to that of AISI 310 W 1.4845. This alloy is especially used for valve parts, pumps for making spacers, bolts and fasteners.
CHEMICAL COMPOSITION ASTM A453 Grade 660 A286 W 1.4980:
| Element | Min | Max |
|---|---|---|
| C | — | 0.08 |
| Ti | 2.3 | 2.35 |
| B | 0.001 | 0.01 |
| Yes | — | 1.0 |
| Mn | — | 2.0 |
| Cr | 13.5 | 16.5 |
| Ni | 24.0 | 27.0 |
| Mo | 1.0 | 1.5 |
| V | — | 0.05 |
| At | — | 0.35 |
| S | — | 0.004 |
| P | — | 0.03 |
MECHANICAL PROPERTIES ASTM A453 Grade 660 A286 W 1.4980:
| Material | League | Rm min (MPa) | Rp 0.2 min (MPa) | A% min | A(4D)% min | Z% min | Hardness |
|---|---|---|---|---|---|---|---|
| ASTM A453 GR 660 A | 1.4980 | 895 | 585 | 15 | 15 | 18 | 248 – 341 HB |
| ASTM A453 GR 660 B | 1.4980 | 895 | 585 | 15 | 15 | 18 | 248 – 341 HB |
| ASTM A453 GR 660 D | 1.4980 | 895 | 725 | 15 | 15 | 18 | 248 – 321 HB |
| 1.4980 EN10269 | 1.4980 | 900 – 1150 | 600 – 900 | 15 | — | — | 27-36 HRC |
PHYSICAL PROPERTIES ASTM A453 Grade 660 A286 W 1.4980:
- Specific gravity: 795 kg/dm³ at 20°C
- Modulus of elasticity: 199,000 N/mm² at 20°C
- Thermal conductivity: 14.6 W/m.K at 20°C
- Specific heat: 500 J/g.K at 20°C
- Coefficients of linear expansion: 20° – 200°C: 16.5, 20° – 400°C: 17.5, 20° – 600°C: 18.5
- Electrical resistivity: 0.73 Ω mm²/m at 20°C
- It is not magnetic.
CORRESPONDENCE AND SPECIFICATIONS A453 GRADE 660:
- W: 1.4980
- AISI: ALLOY 286
- ASTM: A453 G 660
- ASME: SA453 G 660
- EN 10088/3: X 6 NiCrTiMoVB 25-15-2
- AMS: 5731, 5732, 5737
- EN: 10269
- ISO: 267-13
- NACE MR0175
