17-7PH is an austenitic-martensite precipitation hardening stainless steel developed based on 18-8CrNi, also known as controlled phase transformation stainless steel. 17-4PH stainless steel is a stainless steel material with high strength and excellent corrosion resistance. It is an alloy material that improves the mechanical properties and corrosion resistance of stainless steel by adding elements such as copper and aluminum. 17-4PH stainless steel has good forgeability and workability, and its hardness and strength can be changed through heat treatment.
Specifications | In stock, can be customized according to customer requirements |
Form | Plate, Strip,Bar,Tube |
Classification | Precipitation Hardened Steel |
1）Chemical Composition
Alloy | % | C | Mn | Si | P | S | Cr | Ni | Al |
17-7PH | Min |
|
|
|
|
| 15.5 | 3 | 3 |
Max | 0.09 | 1.0 | 1.0 | 0.040 | 0.030 | 18.0 | 7.75 | 1.50 |
2）Physical properties:
The density of 17-7PH is 7.65g/cm³, and the melting point is 1415-1450℃.
Mechanical properties of 17-7PH alloy at room temperature
Alloy | Tensile strength Rm N/mm2 | Yield strength | Elongation δ5 % | Brinell hardness(HB) |
Solid solution 1000~1100°C rapid cooling | ≤1030 | ≤380 | ≥20 | ≤229 |
565℃aging | ≥1140 | ≥960 | ≥5 | ≥363 |
510℃aging | ≥1230 | ≥1030 | ≥4 | ≥388 |
17-4PH stainless steelis widely used in aerospace, nuclear industry, petrochemical industry, medical equipment, marine engineering, and other fields. In the aerospace field, 17-4PH stainless steel is used to manufacture high-strength and corrosion-resistant parts such as aircraft engine parts, missile components, and satellite structures.
In the nuclear industry,17-4PH stainless steelis used to manufacture nuclear reactor components, nuclear power plant equipment, etc.
In the petrochemical industry, 17-4PH stainless steel is used to manufacture corrosion-resistant equipment such as pipes, valves, and pumps.
In the field of medical equipment,17-4PH stainless steelis used to manufacture artificial joints, dental equipment, etc. In the field of marine engineering, 17-4PH stainless steel is used to manufacture offshore platforms, submarine pipelines, etc.
The manufacturing process of stainless steel and alloys involves multiple steps to transform raw materials into flat,rectangular sheets or plates made of stainless steel and alloys. Here are a few key steps for stainless steel and alloys:
Molten stainless steel and alloys are cast into large ingots or billets through a casting process.
During the hot rolling process,the thickness of the steel ingot is gradually reduced and elongated to form long strips or coils.
Annealing involves heating stainless steel and alloys to a specific temperature and then slowly cooling it.
Cold rolling is carried out through rolling mills to reduce thickness to meet customer specifications.
Wuxi Walmay Metal Co,Ltd is a comprehensive processing group of Alloy Steel、Forged Parts Fitting、Titanium Alloy、Stainless Steel、Special Welding Wireseries， and more than 800 specifications.
Our group has been engaged in the domestic and global market for more than ten years with rich steel experience and can offer professional advice for customers inapplications with different materials.
Machine cutting
Sheet cutting
plasma cutting
Dynamic waterjet cutting
sawing
Plank leveling
polishing
laser cutting
laser cutting
production cutting
Long product cutting
Bar and structural cutting
polishing
Heat treatment and annealing: Wuxi Walmay Metal can heat treat certain 400 series stainless steels.
Material Reliability Identification (PMI): Wuxi Walmay Metal can complete this testing in-house.
Ut Testing: Ultrasonic testing (UT) uses high-frequency sound energy to inspect and measure stainless steel products.
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