Like other high-sulphur free machining grades 430F has much reduced resistance to pitting and crevice corrosion compared to its non-free machining equivalent.
HEAT TREATMENT:-
Solution Annealing – Heat to 815-845°C, hold for ½ hour per 25mm of thickness, slow furnace cool to 600°C and then quickly air cool. Slow cooling from 540-400°C will cause embrittlement.
Sub-Critical anneal – Heat to 760-815°C and then air cool or water quench.
This grade is not hardenable by thermal treatment.
EN 10088-3 1.4016 Stainless Steel Mechanical Properties
| Material Grade | Matrial Number | Tensile Strength Rm N/mm² ksi(MPa) min | Yield Strength Rp0.2% N/mm²(MPa) min | Elongation (%) | Brinell Hardness HBW max | Rockwell Hardness HRB max |
| TP 430 | 1.4016 | 400-630 | 240 | 20 | 200 | 90 |
Key Properties
The following sections will provide the key properties of grade 430 stainless steels coil, sheet and plate - covered under ASTM A240/A240M
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