Aerocom Metals carry a full range of sheet and bar in the precipitation hardening 17/7 stainless steel. 17-7 PH contains 17% chromium, 7% nickel and 1% aluminium. It is a precipitation hardening steel capable of reaching very high strength and hardness without any loss of corrosion resistance. Surface scaling and distortion in heat treatment is eliminated by its ability to be treated at very low temperatures. In the annealed condition, it has excellent ductility and machineability. It retains remarkable mechanical and physical properties at temperatures up to 800° F.
SS 17/7 PH is a precipitation hardenable stainless steel that is formable and also capable of meeting high strength requirements. It is utilised in applications that require both high strength and good corrosion resistance. The alloy is classified as semi-austenitic to distinguish the soft phase (austenite) available for ease of forming from the high strength phase (martensite) usually achieved by heat treatment.
The alloy can be formed from the annealed temper but due to a rapid work hardening rate may not be deep drawn without intermediate annealing. It is joined by most arc and resistance methods used for stainless steel. It should not be fusion welded unless shielded by inert gas to prevent oxidation of aluminium.
Strictly speaking, stainless doesn’t rust, but like all materials, there are some environments which are just too corrosive and it will be attacked. When stainless is attacked, the corrosion product looks just like the rust you get on carbon steel.
Grade 17-7 PH stainless steel is widely used in the industry due to its attractive combination of properties including very high spring-like strength, good ductility, and excellent corrosion resistance.