What are the specifications of 17-4 PH Seamless Pipe?

Available in UNS S17400 (Grade 630), OD 1/2"-16" NB, heavy wall / Sch 10S-160, supplied solution annealed (Condition A) or age-hardened to specified H-conditions (H900, H1025, H1150).

How does 17-4 PH achieve its high strength?

Following solution annealing, a low-temperature aging treatment (480°C-620°C) precipitates copper-rich phases throughout the martensitic matrix, dramatically increasing yield and tensile strength.

Which heat treatment condition is best for sour service or toughness?

Condition H1150 or H1150D (double aged) is preferred where higher impact toughness or resistance to stress corrosion cracking in sour environments (NACE MR0175) is required, while H900 delivers maximum strength.

Does Sakshi Forge provide Material Test Certificates (MTC) for 17-4 PH Seamless Pipe?

Yes, MTC as per EN 10204 3.1 is provided with every dispatch along with hardness and heat treatment verification.

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17-4 PH Seamless Pipe - Precipitation Hardening High Strength Pipe | Sakshi Forge

Martensitic Precipitation-Hardening Pipe Delivering 1170 MPa Yield Strength & 304-Level Corrosion Resistance

Precipitation hardenable to ultra-high yield strength (up to 1170 MPa / 170 ksi) via single-step aging

Corrosion resistance comparable to 304 stainless steel in most industrial environments

Available in Solution Annealed Condition A or pre-heat treated tempers (H900, H1025, H1150, H1150M)

EN 10204 3.1 MTC100% PMI TestedISO 9001:2015 CertifiedHydrostatic Tested

Hygienic Steel Grade

Request Price Quote

MTC EN 10204 3.1 Included

Global Sea & Air Freight

Electro-Chemical Finish Certificate

Response turnaround: Under 2 hours

Product Profile

17-4 PH (UNS S17400 / AISI Grade 630 / EN 1.4542) is a martensitic precipitation-hardening stainless steel seamless pipe engineered for applications requiring an exceptional combination of ultra-high mechanical strength, hardness, and corrosion resistance comparable to standard 304 stainless steel. Its composition features 15.0%-17.5% Chromium, 3.0%-5.0% Nickel, 3.0%-5.0% Copper, and a niobium/tantalum addition (0.15%-0.45%). Through a simple low-temperature heat treatment process (precipitation hardening / aging from H900 to H1150), 17-4 PH develops tensile strengths up to 1310 MPa (190 ksi) and yield strengths up to 1170 MPa (170 ksi) while maintaining high fracture toughness and resistance to scaling up to 315°C (600°F). Sakshi Forge manufactures 17-4 PH seamless pipes via hot extrusion and cold drawing, supplied in Solution Annealed Condition A (ready for customer heat treatment) or pre-aged condition (H900, H1025, H1150, H1150M). It is widely specified for aerospace hydraulic lines, defense structural tubing, nuclear control rod tubes, and high-pressure pump shafts.

Terminology & Abbreviations

UNS S17400|S17400

AISI Grade 630|Grade630

Werkstoff 1.4542|1.4542

17-4 PH|17-4PH

Key Technical Facts

Alloyed with 15.0-17.5% Cr, 3.0-5.0% Ni, 3.0-5.0% Cu, and 0.15-0.45% Nb+Ta

Copper additions precipitate microscopic sub-grain particles during aging, dramatically hardening the matrix

Yield strength adjustable from 750 MPa (H1150) up to 1170 MPa (H900) via low-temperature thermal aging

Corrosion resistance matches 304 in atmospheric and fresh water service; superior to 400-series martensitic steels

Low-temperature heat treatment (480°C - 620°C) minimizes distortion, scaling, and dimensional changes

Manufactured via seamless extrusion and precision cold drawing per ASTM A564 / AMS 5643

Supplied in Solution Annealed Condition A or fully aged conditions (H900, H1025, H1150, H1150M)

100% hydrotested, PMI verified, and certified to EN 10204 3.1 standards

Why Choose Sakshi Forge

Our commitment to sterile, high-purity processing makes us a trusted manufacturing partner globally.

100% Heat Lot Traceability

Every pipe stamped with heat number matching EN 10204 3.1 MTC

Positive Material Identification (PMI)

Handheld XRF testing on every length prior to dispatch

Advanced NDT Inspection

Hydrostatic test and Eddy Current / Ultrasonic flaw detection on all orders

Precision Cold Drawing

Tighter wall thickness tolerances and superior internal bore smoothness

Custom Cut Lengths

Fixed lengths up to 12 meters or custom cut-to-length options to eliminate jobsite scrap

Ferrite & Phase Balance Testing

Ferritescope testing for duplex and super duplex grades to ensure 40-60% phase balance

High-Temperature Stabilization

Controlled heat treatment to fully precipitate carbides and optimize creep life

Pan-India & Export Freight

Fast dispatch across India and seaworthy export packing for global projects

Extensive Mill Stocking

Immediate inventory availability in standard schedules from Sch 10S to Sch 160

Third-Party Inspection Approved

Full support for TUV, SGS, DNV, Bureau Veritas, and Lloyds audits

Frequently Asked Questions

Common technical and pricing queries regarding specifications and ordering.

17-4 PH seamless pipe is specified under UNS S17400 / AISI Grade 630 / ASTM A564 / AMS 5643. It features 17% Cr, 4% Ni, 4% Cu, and precipitation hardening capability up to 1170 MPa yield strength.

Partner with Sakshi Forge for Reliable Industrial Steel Solutions

Delivering precision-engineered flanges, pipes, and forged steel components designed for strength, durability, and performance in critical high-pressure industrial applications.