What does the PH stand for in 17 4PH?
PH stainless steels are a group of alloys that are resistant to the effects of corrosion. To increase their yield strength, these alloys are subjected to heat treatment during precipitation hardening (PH) or age hardening.
Can 17-4 be hardened?
Properties. 17-4 can be heat treated to high levels of strength and hardness, and features corrosion resistance and machinability comparable to austenitic 304 stainless. Being martensitic, 17-4 is magnetic. 17-4 is capable of being hardened up to approximately 44 Rc when heat treated to condition H900.
What type of material is 17 4PH?
Alloy 17-4PH (UNS S17400), Type 630, is a chromium-nickel-copper precipitation-hardening martensitic stainless steel with an addition of niobium. 17-4PH combines high strength and hardness with good corrosion resistance.
Does 17-4 PH Harden?
In the hardened condition 17-4 will not work harden significantly. I presume that you heat treat first since you need tighter dimensional tolerance than you can get with post-machining heat treatment.
Will 17-4 PH rust?
The martensitic PH stainless grades like 17-4 and 15-5 will also rust. Note that Alloy 36 (36% NI, balance iron) will readily rust. It is not a stainless steel, since it has no chromium. These alloys are commonly delivered from the mill with a light rust or dark oxide on the surface.
Does 17-4PH Harden?
How do you heat treat 17-4PH stainless steel?
Age hardening of 17–4 PH usually consists of two steps: solution treatment followed by quenching and subsequent aging for precipitation hardening. For 17–4 PH, the solution treatment is done at 1050 °C for 30 min while the aging temperatures range from 480 °C to 760 °C with a duration of two to four hours.
Is 17 4ph stainless steel magnetic?
Its intense tensile strength keeps its ductility and hardness at temperatures at nearly 600°F, while still demonstrating exceptional corrosion resistance in all conditions offered by Premium Alloys. Just as all martensitic metals, 17-4 is magnetic.