| Application: | Industrial |
|---|---|
| Standard: | GB, ASTM |
| Purity: | >99.5% |
| Alloy: | Alloy |
| Powder: | Not Powder |
| Transport Package: | Wooden |
| Customization: |
|---|
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Audited Supplier 17-4PH stainless steel
Martensitic precipitation hardening stainless steel
17-4PH stainless steel is a martensitic precipitation hardening stainless steel, equivalent to the Chinese grade: 0Cr17Ni4Cu4Nb. 17-4PH Precipitation hardening steel with copper added. 17-4PH is used in the manufacture of shafts and steam turbine components.
Chinese name: 17-4PH stainless steel
Standard: AISI, ASTM
Model: 17-4PH (SUS630)
UNS number: S17400
17-4PH characteristics and application:
17-4PH chemical composition:
Carbon C: ≤0.07
Manganese Mn: ≤1.00
Silicon Si: ≤1.00
Chromium Cr: 15.5~17.5
Nickel Ni: 3.0~5.0
Phosphorus P: ≤0.04
Sulfur S: ≤0.03
Copper Cu: 3.0~5.0
Niobium+Tantalum Nb+Ta: 0.15~0.45
17-4PH mechanical properties:
Tensile strength σb (MPa): aging at 480ºC, ≥1310; aging at 550ºC, ≥1060; aging at 580ºC, ≥1000; aging at 620ºC, ≥930
Conditional yield strength σ0.2 (MPa): aging at 480ºC, ≥1180; aging at 550ºC, ≥1000; aging at 580ºC, ≥865; aging at 620ºC, ≥725
Elongation δ5 (%): aging at 480ºC, ≥10; aging at 550ºC, ≥12; aging at 580ºC, ≥13; aging at 620ºC, ≥16
Area shrinkage ψ (%): aging at 480ºC, ≥40; aging at 550ºC, ≥45; aging at 580ºC, ≥45; aging at 620ºC, ≥50
Hardness: solid solution, ≤363HB and ≤38HRC; aged at 480ºC, ≥375HB and ≥40HRC; aged at 550ºC, ≥331HB and ≥35HRC; aged at 580ºC, ≥302HB and ≥31HRC; aged at 620ºC, ≥277HB and ≥28HRC
17-4PH heat treatment specification and metallographic structure:
Heat treatment specifications:
1) Rapid cooling at 1020-1060°C in solution;
2) Aging at 480°C, after solution treatment, air-cooling at 470-490°C;
3) Aging at 550°C, air-cooling at 540-560°C after solution treatment;
4) Aging at 580°C, after solution treatment, air cooling at 570-590°C;
5) Aging at 620°C, after solution treatment, air cooling at 610-630°C.
Metallographic structure: The structure is characterized by precipitation hardening.
17-4PH delivery status: Generally, it is delivered in a heat-treated state, and the type of heat treatment is indicated in the contract; if it is not indicated, it is delivered in a non-heat-treated state.
Note:
A single value is the highest value unless otherwise specified;
When used in some pipe-making processes, the nickel content of some types of austenitic stainless steel must be slightly higher than the value shown in the table;
Optional; The maximum TA content is 0.10%;
The maximum content is 0.75%;
The maximum content is 0.70%
Alloy 17-4PH is a precipitation, hardening, martensitic stainless steel.
Alloy 17-4PH is a precipitation, hardening, martensitic stainless steel composed of copper, niobium/columbium.
This grade features high strength, hardness (up to 300°C/572°F) and corrosion resistance.
After heat treatment, the mechanical properties of the product are more complete and can reach compressive strengths as high as 1100-1300 mpa (160-190 ksi).
This grade cannot be used at temperatures higher than 300°C (572°F) or at very low temperatures. It has good corrosion resistance to atmospheric and dilute acids or salts. Its corrosion resistance is the same as 304 and 430.
17-4PH application areas:
· Offshore platforms, helidecks, other platforms
· food industry
· Pulp and paper industry
· Aerospace (turbine blades)
· mechanical part
· Nuclear waste barrels
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