Corresponding brand: sus631/s17700/0cr17ni7al.
It is a dispersion hardened stainless steel with high strength, high hardness, fatigue resistance, good corrosion resistance and ductility, and small deformation at high temperature. This kind of steel has good performance, especially suitable for aerospace field, and this special alloy is also suitable for other fields with high requirements for strength and corrosion resistance. When the temperature reaches 3 16℃, the spring performance is still good. SUS63 1 is used in aerospace, chemical, petrochemical, paper and metal processing industries.
17-7PH characteristics and scope of application:
Precipitation hardening steel containing aluminum is used as spring, heating ring and mating parts.
Mechanical properties of 17-7PH
Tensile strength σb (MPa): solid solution, ≤1030; Aging at 565℃, ≥1140; 5 10℃ aging, ≥ 1230
Conditional yield strength σ0.2 (MPa): solid solution ≤ 380; Aging at 565℃, ≥ 960; 5 10℃ aging, 1030
Elongation δ 5 (%): solid solution, ≥ 20; Aging at 565℃, ≥ 5; Aging at 5 10℃, ≥4
Area shrinkage ψ (%): aging at 565℃, ≥ 25; 5 10℃ aging, ≥ 10
Hardness: solid solution, ≤ 229 HB; Aging at 565℃, ≥ 363 HB; Aging at 5 10℃, ≥388HB.
17-7PH heat treatment specification and metallographic structure
Heat treatment specification: 1) solid solution, 1000 ~ 1 100 rapid cooling; 2) aging at 565℃, after solution treatment, keeping the temperature at 760 65438 05℃ for 90 minutes, cooling to below 65438 05℃ within 65438±0h, keeping the temperature for 30 minutes, then heating to 565 65438 00℃ for 90 minutes, and air cooling; 3) aging at 565438 00℃, after solution treatment, keeping the temperature at 955 65438 00℃ for 65438 00 minutes, cooling to-73 6℃ within 24 hours at room temperature, keeping the temperature for 8 hours, and then heating to 565438 65438 00℃ for 60 minutes.
Metallographic structure: This structure is characterized by precipitation hardening.
Delivery status: generally, the goods are delivered in heat treatment status, and the type of heat treatment is indicated in the contract; If there is no stipulation, the goods shall be delivered without heat treatment.
17-7PH Main specifications:
17-7PH seamless pipe, 17-7PH steel plate, 17-7PH round steel, 17-7PH forging, 17-7PH flange, 17-7PH ring. 17-7PH welding wire and welding material, 17-7PH round cake, 17-7PH flat steel, 17-7PH hexagonal bar, 17-7PH head,17-.
Space is limited. If you need a more detailed introduction, please consult.