17-4PH.
17-4PH is a precipitation-hardening stainless steel used for specified machined and load-bearing components.
Can’t find your grade? Send it — we’ll source it.
Our stockist and mill sourcing network extends beyond the grades listed here. Send rare grades, unusual forms and small-quantity requirements for sourcing review.
One enquiry gives us the details to check suitable sources across the network and help move your purchase forward. Share the exact grade, standard, form, size, quantity, delivery town and required date. We’ll confirm availability, minimum order quantity and lead time against your requirement.
Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Quick details
| Material grade | 17-4PH (UNS S17400) |
|---|---|
| Forms | Sheets & plates, Round bars |
| Usage / application | Pump and propeller shafts, Valve stems and gates, Aerospace and defence fittings |
| Test certificate | Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request. |
| Business type | Stockist and supplier |
| Location | 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India |
Also searched as: 17-4PH, 630, UNS S17400, W.Nr 1.4542, X5CrNiCuNb16-4
Product information for purchasing teams
17-4PH is a precipitation-hardening stainless steel used for specified machined and load-bearing components. Strength, toughness and corrosion behaviour depend on the ordered heat-treatment condition; state the required condition on the enquiry.
Exact specification, availability and commercial details are confirmed against your enquiry.
Product forms and standards
| Form | Standard |
|---|---|
| Sheets & plates | ASTM A693 Type 630 |
| Round bars | ASTM A564 Type 630 |
Related designation references
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| 17-4PH | S17400 | 1.4542 | X5CrNiCuNb16-4 | SUS 630 |
Cross-standard references are not automatic substitutes. Confirm the exact product form, specification, composition, class and condition before accepting a substitution.
Chemical composition, %
| Grade | C | Mn | Si | P | S | Cr | Ni | Cu | Nb + Ta |
|---|---|---|---|---|---|---|---|---|---|
| 17-4PH | ≤ 0.07 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 15.0 – 17.5 | 3.0 – 5.0 | 3.0 – 5.0 | 0.15 – 0.45 |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength, H1150 | ≥ 930 MPa |
| Yield strength, H1150 | ≥ 725 MPa |
| Tensile strength, H900 | ≥ 1310 MPa |
| Yield strength, H900 | ≥ 1170 MPa |
Values per ASTM A564 Type 630. Values depend on the ageing condition ordered.. Confirm against the current edition of the standard and your purchase specification.
Density: 7.78 g/cm³
Applications
- Pump and propeller shafts
- Valve stems and gates
- Aerospace and defence fittings
- High-strength fasteners
Questions buyers ask
Which condition should I order 17-4PH in?
Bar is usually supplied in Condition A (solution treated) for machining, then aged to H900, H1025 or H1150 depending on the strength and toughness needed. State the condition on your enquiry.
What are the equivalent grades of 17-4PH?
17-4PH is UNS S17400, Werkstoff 1.4542, EN X5CrNiCuNb16-4 and JIS SUS 630. Cross-standard references are not automatic substitutes; verify the product form, standard, composition and condition.
In which forms is 17-4PH available?
Sheets & plates to ASTM A693 Type 630; Round bars to ASTM A564 Type 630.
What is the density of 17-4PH?
About 7.78 g/cm³ (7,780 kg/m³).
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India We supply across India.