Starting 403 plate steel ss temperature between 2000°F and 2100°F is recommended for forging, with a finishing temperature recommended above 1400°F . Final forging temperatures as low as 1300°F, if care 403 plate steel ss is taken not to rupture steel. Better 403 plate steel ss mechanical properties obtained in forged and tempered condition in lower temperatures
403 plate steel ss Annealing
May be annealed at 1500-1650°F, followed by a slow cool to 1100°F , and a final air cool.
403 plate steel ss Hardening
Material may be fully hardened by oil quenching from 1650-1800°F
Light sections may be hardened by air or fan cooling.
Alloy will harden, to varying degrees, when cooled from temperatures above 1500°F
403 plate steel ss Physical Properties:
| Denstiy lbm/in3 | Coefficient of Thermal Expansion (min/in)-°F | Thermal Conductivity BTU/hr-ft-°F | Specific Heat BTU/lbm -°F | Modules of Elasticity (annealed)^2-psi | |
|---|---|---|---|---|---|
| at 68 °F | at 68 – 212°F | at 68 – 1450°F | at 200°F | at 32 – 212°F | in tension (E) |
| 0.276 | 5.5 | 6.6 | 9.3 | 14.4 | 29 x |
403 plate steel ss TEMPERING
May be done at a temperature between 400°F -1400°F
Advisable to avoid the 800°F – 1100°F range due to a decrease in impact properties and corrosion resistance.
Strength and hardness decrease in the 800°F – 1100°F while ductility and toughness increase as the tempering temperature is raised.
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