Hot Rolled SUS630 / 17-4PH / Alloy 630 Stainless Steel Seamless Pipe BA AP SS Hollow Tube
Hot Rolled SUS630 / 17-4PH / Alloy 630 Stainless Steel Seamless Pipe BA AP SS Hollow Tube
Products Specification
| Products Name | Stainless Steel Seamless Pipe |
Grade: |
304 304L 309S 310S 314 316L 316Ti 321 329 347H 410 2205 2507 904L 254SMO 17-4PH and equal grade in GB JIS EN DIN Standard |
| Standards: | ASTM A213M-94b ASTM A249M-94a ASTM A269-94a ASTM A312M-94b,ect. |
| DIN 17456-85 DIN 17458-85 DIN 17459-92.ect | |
| JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect. | |
| GB13296-1991 GB14975-2002 GB14976-2002,ect. | |
| Size: | ND5 - DN400 |
| Length: | 6m length or cutting any length as request |
| Applications: | fluid and gas transport, structure , boiler, heat exchanger, super heater |
630 Stainless Steel Seamless Tubing – Product Information
*(UNS S17400 / 17-4PH Precipitation-Hardening Stainless Steel)*
1. Product Description
630 Seamless Tubing is a martensitic precipitation-hardening stainless steel offering exceptional strength, corrosion resistance, and machinability. The "630" designation (per AMS/UNS) is synonymous with 17-4PH. Supplied in solution-annealed Condition A, it achieves high mechanical properties via low-temperature aging heat treatment (e.g., H900, H1150). Ideal for high-stress, corrosive, and moderate-temperature applications where standard austenitic steels (304/316) lack sufficient strength.
2. Key Specifications & Standards
| Category | Details |
|---|---|
| Material Standard | ASTM A564 (Age-Hardening Stainless Steel), AMS 5643, ASTM A511 (Seamless Mechanical Tubing) |
| UNS Designation | S17400 |
| EN/DIN Equivalent | 1.4542 (X5CrNiCuNb16-4) |
| Common Tempers | Condition A (Solution Annealed), Aged: H900, H1025, H1100, H1150, H1150M |
3. Chemical Composition (% Weight, Typical)
| Element | Cr | Ni | Cu | Nb+Ta | C (max) | Mn (max) | Si (max) | Fe |
|---|---|---|---|---|---|---|---|---|
| Content | 15.0-17.5 | 3.0-5.0 | 3.0-5.0 | 0.15-0.45 | 0.07 | 1.00 | 1.00 | Balance |
4. Mechanical Properties (Aged Conditions)
| Aging Condition | Tensile Strength (min) | Yield Strength (min) | Elongation % (min) | Hardness (HRC) |
|---|---|---|---|---|
| H900 | 190 ksi (1310 MPa) | 170 ksi (1170 MPa) | 10 | 40–48 |
| H1150 | 135 ksi (930 MPa) | 105 ksi (725 MPa) | 12 | 30–38 |
| H1150M | 110 ksi (760 MPa) | 85 ksi (585 MPa) | 15 | 28–36 |
5. Physical Properties
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Density: 0.282 lb/in³ (7.80 g/cm³)
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Melting Point: 2560–2625°F (1400–1440°C)
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Magnetic Response: Yes (martensitic structure)
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Thermal Conductivity: 14.4 BTU·ft/hr·ft²·°F (24.9 W/m·K)
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Corrosion Resistance: Comparable to 304 stainless; resistant to acids, freshwater, steam, and petroleum.
6. Tubing Specifications
| Parameter | Details |
|---|---|
| Type | Seamless (SMLS), Cold-Drawn or Hot-Finished |
| OD Range | 0.125" – 8" (3.18 mm – 203 mm) |
| Wall Thickness | 0.020" – 1.5" (0.51 mm – 38.1 mm) |
| Length | Standard: 12–24 ft (3.6–7.3 m); Custom cuts available |
| Tolerances | ASTM A511, ASTM A564, or custom precision (e.g., ±0.001" on OD) |
| Surface Finish | Annealed/pickled, polished (#4, #8, mirror), sandblasted, or as-requested |
7. Packaging
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Standard: Bundled with plastic/corrugated wrapping, wood-crated or palletized.
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Protection: PVC end caps, VCI (vapor corrosion inhibitor) paper for long-term storage.
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Labeling: Heat number, size, temper, quantity, and compliance marks (RoHS/REACH).
8. Value-Added Services
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Cutting: Precision saw, abrasive waterjet, or laser cutting.
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Heat Treatment: Custom aging (H900 to H1150M) for target strength/toughness.
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Machining: CNC turning, milling, threading, grooving.
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Surface Treatment: Passivation, electropolishing, bead blasting.
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Testing: Eddy current (ECT), hydrostatic, ultrasonic (UT), PMI (positive material identification).
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Welding: TIG/GTAW with ER630 filler wire.
9. Applications
630 seamless tubing is critical in high-performance sectors:
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Aerospace: Landing gear, actuator cylinders, hydraulic lines.
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Oil & Gas: Downhole tools, valve stems, chemical injection tubing.
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Medical: Surgical instruments, implantable device components (biocompatible grades available).
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Power Generation: Turbine blades, heat exchanger tubes.
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Industrial: Hydraulic/pneumatic cylinders, bearings, nuclear waste containers.
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Marine: Propeller shafts, subsea fittings.
10. Compliance & Certification
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Mill Test Reports (MTRs) per EN 10204 3.1/3.2.
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Compliance: NACE MR0175, ASTM A262, AMS 5643.
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Certifications: ISO 9001, AS9100, PED 2014/68/EU (upon request).
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