430 stainless pipe steel

Hot working

Initial forging and pressing temperature range: 1100 - 1150oC
Finishing temperature: below 750oC
stainless_steel_round_tubes

Generally the recommended method of hot forming is to work the material at between 1300 and 1500 F. Hot forming is only required on heavy sections

Avoid extended holding times above 1000oC as excessive grain growth takes place, which severally reduces ductility

430 stainless pipe steelsss

Note: Soaking times to ensure uniformity of temperature are longer for stainless steel than for carbon steels. Use up to 1/2 times the time employed for the same thickness of mild steel.

Stress for a creep rate of 1% in 10 000 h

Temperature, oC	550	600	650	700	750
Stress, MPa	50	30	15	5	3

Like other high-sulphur free machining grades 430F has much reduced resistance to pitting and crevice corrosion compared to its non-free machining equivalent, particularly in the cross-section direction.