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| Chemical Composition | ||||||||
| Min. % | Max % | |||||||
| Carbon | 0 | 0.15 | ||||||
| Silicon | 0 | 1.00 | ||||||
| Manganese | 0 | 2.00 | ||||||
| Nickel | 8.00 | 10.00 | ||||||
| Chromium | 17.00 | 19.00 | ||||||
| *Molybdenum | 0 | 1.00 | ||||||
| Phosphorous | 0 | 0.06 | ||||||
| Sulphur | 0.15 | 0.35 | ||||||
| *Molybdenum option addition. | ||||||||
| Mechanical Property Requirements - Annealed to ASTM A582/A582M-95b 303 | ||||||||
| Conditioned | Annealed | |||||||
| Hardness | HB 262 Max. | |||||||
| Typical Mechanical Properties At Room Temperature - Annealed | ||||||||
| Finish | Cold Drawn | Other | ||||||
| Tensile Strength Mpa | 720 | 600 | ||||||
| Yield Strength Mpa | 510 | 240 | ||||||
| Elongation in 50mm % | 36 | 55 | ||||||
| Impact Charpy V J | 120 | |||||||
| Hardness | HB | 220 | 165 | |||||
| Rc | 165 | |||||||
| Elevated Temperature Properties | ||||||||
| 303 displays good oxidation resistance in continuous service up to 870 oC and in intermittent service up to 760 oC.
Continuous service however, between 430 oC and 850 oC is not recommended, nor is slow cooling through this range due to the problem of intergranular corrosion. N.B. High temperature use is therefore not generally recommended. | ||||||||
| Cold Bending | ||||||||
| 303 has very limited cold bending properties and it is not generally recommended. | ||||||||
| Hot Blending | ||||||||
| Hot bending should be performed at 950 oC - 1100 oC, followed by annealing to restore optimum corrosion resistance. | ||||||||
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