17-4 PH Stainless Steel Forgings
Metracore Alloys supplies 17-4 PH Stainless Steel Forgings across a full product range: shafts, rings, discs, blocks, hubs, sleeves, valve bodies, and flanges, in open die and closed die form. Each consignment passes testing for corrosion resistance, strength, dimensional accuracy, and durability before dispatch from our warehouse.
17-4 PH (UNS S17400 / Type 630) is a precipitation-hardening martensitic stainless steel. It pairs high strength and excellent hardness with good corrosion resistance, and heat treatment lets engineers tune its mechanical properties to suit a specific design. That flexibility is why 17-4 PH forgings appear in precision-engineered components operating under high pressure, heavy loads and corrosive media.
Metracore Alloys manufactures and supplies 17-4 PH Stainless Steel Forgings engineered for extreme durability, high load capacity, and severe environment resistance. Produced by compressive hot-forging from UNS S17400 billets, these components feature a refined grain structure and closed internal voids to deliver superior toughness compared to standard castings.
What are 17-4 PH Stainless Steel Forgings?
17-4 PH Stainless Steel Forgings are components produced by deforming heated UNS S17400 billet under controlled compressive force. Forging refines the grain structure and closes internal voids, so the finished part carries higher toughness than a casting.
Heat treatment sits at the centre of how this alloy works. Mills solution anneal the forging at 1040 °C, then age it: 1 hour at 482 °C. This produces the high-strength H900 condition, while 4 hours at 621 °C gives the tougher H1150 condition. Copper-rich precipitates form during ageing and block dislocation movement, raising strength sharply. Machinability is excellent after overageing to H1150. Its strong corrosion resistance ensures a long service life in critical applications.
- 17-4 PH Stainless Steel Forgings Specification
- Types of 17-4 PH Stainless Steel Forgings
- Technical Details of 17-4 PH Stainless Steel Forgings
- Equivalent Grades of 17-4 PH Stainless Steel Forgings
- 17-4 PH Stainless Steel Forgings Chemical Composition
- 17-4 PH Stainless Steel Forgings Mechanical Properties
- Manufacturing Process of 17-4 PH Stainless Steel Forgings
- 17-4 PH Stainless Steel Forgings Application
Performance Advantages
17-4 PH strikes a ideal balance by pairing the strength of high-grade alloy steel with the excellent corrosion resistance of austenitic stainless steel.
- Strength reaches 1310 MPa tensile after precipitation hardening to H900, without quench distortion.
- Wear resistance in aged conditions protects journals and valve trims against galling.
- Corrosion resistance in atmospheric and mildly corrosive service is comparable to grade 430 stainless, though it falls short of austenitic grades such as 304 in chloride-bearing environments.
- Fatigue strength stays high over millions of cycles; grain flow follows the component contour.
- Dimensional stability is a practical gain: low ageing temperatures let parts be machined near final size first.
- Load-bearing capacity supports press-fitted and bolted connections.
- Machining is easy in Condition A and H1150; one ageing cycle sets final properties.
- Long-term performance holds steady up to about 300 °C.
Quality Control & Testing
Each batch of ASTM A564 Type 630 Forgings we supply is tested to ASTM A564, ASTM A705, ASTM A788 and AMS 5643 for aerospace traceability. Every shipment is accompanied by an EN 10204 3.1 Mill Test Certificate detailing the heat analysis and mechanical results. Our inspection regime consists of:
- Ultrasonic Testing (UT) for internal soundness
- PMI Testing to confirm alloy identity
- Hardness Testing against the specified condition
- Mechanical Testing of tensile and yield values
- Dimensional Inspection against drawings
- Visual Examination for surface defects
Benefits of 17-4 PH Stainless Steel Forgings
Beyond the datasheet, 17-4 PH Precision Forgings deliver practical gains across procurement and whole-life cost.
- One alloy covers duties that would otherwise need separate high-strength and corrosion-resistant materials.
- Condition A stock can be aged to H900, H1025, or H1150 as requirements change.
- Operational lifespan runs long in aggressive service.
- Maintenance costs fall because hard, corrosion-resistant surfaces need less frequent repair.
- Cyclic loading is handled with high reliability in rotating equipment.
- Precision-engineered components keep their tolerances through heat treatment.
Why Choose Metracore Alloys?
Metracore Alloys is a trusted supplier of precision forged stainless steel components. We source from reputed manufacturers with advanced forging and heat treatment facilities. Custom forgings to your drawings and specifications are accepted. Third-party inspection is available on request, and each consignment is supplied with an EN 10204 3.1 Mill Test Certificate. There is rigid quality assurance throughout. Coupled with competitive pricing, reliable delivery timelines and an established global supply network, Metracore Alloys remains the trusted partner for repeat buyers. Please send your technical drawings for an official quote.
17-4 PH Stainless Steel Forgings Specifications
Standard
Ultrasonic Testing (UT), PMI Testing, Hardness Testing, Mechanical Testing, Dimensional Inspection, Visual Examination
UNS Number
S17400
Sizes in Stock
Custom dimensions as per customer drawings and specifications
Forging Method
Open die forging, closed die forging, ring rolling
Form
Forged shafts, rings, discs, blocks, hubs, sleeves, valve bodies, flanges
Tolerance
H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements
Thickness
50 mm to 6000 mm Long
Certification
EN 10204 3.1 Mill Test Certificate
Types of 17-4 PH Stainless Steel Forgings
Forged Shafts
Forged Rings
Forged Discs
Forged Blocks
Forged Hubs
Forged Sleeves
Forged Valve Bodies
Forged Flanges
Open Die Forgings
Custom Closed Die Forgings
Reach out to Metracore Alloys for reliable 17-4 PH Stainless Steel Forgings solutions.
Technical Details of 17-4 PH Stainless Steel Forgings
Chemical Composition
Copper and niobium set 17-4 PH apart from other martensitic grades. The composition follows ASTM A564 Type 630 limits.
| Element | Chromium (Cr) | Nickel (Ni) | Copper (Cu) | Niobium + Tantalum (Nb + Ta) | Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulphur (S) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|---|
| Content (%) | 15.0 – 17.5 | 3.0 – 5.0 | 3.0 – 5.0 | 0.15 – 0.45 | 0.07 max | 1.00 max | 1.00 max | 0.040 max | 0.030 max | Balance |
Mechanical Properties
Ageing condition determines the mechanical properties of 17-4 PH Forgings. The table compares minimums for the H900 and H1150 conditions.
| Property | H900 Condition | H1150 Condition |
|---|---|---|
| Tensile Strength (min) | 1310 MPa | 930 MPa |
| Yield Strength, 0.2% offset (min) | 1170 MPa | 725 MPa |
| Elongation (min) | 10% | 16% |
| Hardness (min) | 40 HRC | 28 HRC |
| Density | 7.75 g/cm³ | 7.75 g/cm³ |
| Impact Strength (Charpy V-notch, typical) | Not specified | 68 J |
Manufacturing Process of 17-4 PH Stainless Steel Forgings
Duplex Steel Bars Application
Products
Exporter, Manufacturer & Supplier of 17-4 PH Stainless Steel Forgings in various grades, sizes, shapes and specifications.
FAQs
What are 17-4 PH Stainless Steel Forgings?
17-4 PH Stainless Steel Forgings are forged components made from precipitation-hardening martensitic stainless steel UNS S17400, valued for high strength and good corrosion resistance.
What does precipitation hardening mean in 17-4 PH stainless steel?
Precipitation hardening means copper-rich particles form inside the steel during ageing, blocking dislocation movement and lifting strength well past the annealed level.
Which heat treatment conditions are available for 17-4 PH Forgings?
Four conditions are standard: Condition A (solution annealed), H900, H1025, and H1150. H900 gives peak strength; H1150 favours toughness and machinability.
Which industries commonly use 17-4 PH Stainless Steel Forgings?
Oil and gas, pump and valve manufacturing, power generation, chemical processing, marine engineering and industrial machinery are the main sectors specifying these forgings for high-stress components.
Can you manufacture custom forgings as per customer drawings?
Yes. We arrange custom open or closed die forgings to your drawings through manufacturing partners, then inspect before dispatch.
Do you provide Mill Test Certificates and third-party inspection?
Yes, we provide an EN 10204 3.1 Mill Test Certificate with every order and third-party inspection can be arranged upon request.
What are the advantages of 17-4 PH over conventional stainless steel forgings?
17-4 PH reaches 1310 MPa tensile strength in the H900 condition, far above austenitic forgings, while keeping comparable corrosion resistance.
Do you export 17-4 PH Stainless Steel Forgings worldwide?
Yes, we export worldwide through our domestic and international network, with documentation and packing for sea or air freight.