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SS 17-4 PH Bolts Manufacturer & Exporter in India

Explore SS 17-4 PH Bolts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are SS 17-4 PH Bolts?

SS 17-4 PH bolts are high-strength precipitation-hardening stainless steel fasteners manufactured from UNS S17400 bar stock, conforming to ASTM A564/A693. The alloy’s unique combination of chromium (15-17.5%), nickel (3-5%), and copper (3-5%) enables martensitic transformation and precipitation hardening, delivering tensile strengths up to 1310 MPa in the H900 condition.

These bolts offer excellent corrosion resistance, superior mechanical properties, and outstanding toughness in both base metal and welds. SS 17-4 PH bolts are widely specified for critical bolted joints in aerospace, chemical processing, power generation, and marine applications where high strength and moderate corrosion resistance are required.

Quick Specifications

MaterialSS 17-4 PH
UNS NumberS17400
DIN Number1.4542
Material StandardASTM A564 / A693
Bolt Standard (Metric)DIN 931 / DIN 933 / ISO 4014
Bolt Standard (Inch)ASME B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength930-1310 MPa (135-190 ksi)
Yield Strength860-1180 MPa (125-171 ksi)
Hardness28-44 HRC (condition dependent)
? All material certified by NABL-accredited laboratory. PMI and heat treatment certificates available on request.

Complete the Fastener Set

Other SS 17-4 PH Fastener Products Available from RealBolt

RealBolt also manufactures the complete SS 17-4 PH fastener range from certified stainless steel bar stock, including SS 17-4 PH Nuts, SS 17-4 PH Screws, SS 17-4 PH Washers, SS 17-4 PH Studs, and SS 17-4 PH Threaded Rods. All SS 17-4 PH fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
SS 17-4 PH Nuts
SS 17-4 PH Screws
SS 17-4 PH Washers
SS 17-4 PH Studs
SS 17-4 PH Threaded Rods

Technical Data

SS 17-4 PH Bolts Dimensions, Sizes & Thread Standards

SS 17-4 PH Bolts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 931 (partial thread) / DIN 933 (full thread) / ISO 4014. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.2.1. All SS 17-4 PH bolts dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Hex Bolt Dimensions - Metric (DIN 931 / ISO 4014)

Size (M)Pitch (mm)A/F (mm)Head Ht (mm)Min L (mm)Max L (mm)
M61.0104.010200
M81.25135.312250
M101.5176.416300
M121.75197.520400
M162.02410.025500
M202.53012.530600
M243.03615.040600
M303.54618.750800
M364.05522.5601000
M424.56526.0801000
M485.07530.01001200
M565.58535.01201500
M646.09540.01402000

Dimensional & Material Standards

StandardCoversThread
DIN 931Hex bolts, partial threadMetric
DIN 933Hex bolts, full threadMetric
ISO 4014Hex head screws, partialMetric
ISO 4017Hex head screws, fullMetric
ASME B18.2.1Hex & heavy hex boltsUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75Stud bolts, high-pressureUNC
Material StandardRequirement
ASTM A564Bar/rod - UNS S17400
ASTM A693Plate/strip - 17-4 PH
ASTM F593Fastener mechanical
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

SS 17-4 PH Chemical Composition

SS 17-4 PH Bolts are manufactured from an iron-chromium-nickel alloy with chromium (16–26%), nickel (8–28%), and grade-specific molybdenum additions per ASTM and ASTM A193/A194. Chromium content governs the self-healing passive oxide film; molybdenum (2–6%) enhances chloride pitting resistance; and carbon content determines sensitization risk in welded assemblies.

Chemical Composition per ASTM A564

ElementComposition (%)
Chromium (Cr)15.0-17.5
Nickel (Ni)3.0-5.0
Copper (Cu)3.0-5.0
Manganese (Mn)1.0 max
Silicon (Si)1.0 max
Carbon (C)0.07 max
Phosphorus (P)0.04 max
Sulfur (S)0.03 max
Columbium + Tantalum (Nb+Ta)0.15-0.45
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. PMI and heat treatment certificates available on request.

Why SS 17-4 PH Alloy Composition Matters for Bolts

Precipitation Hardening — High Strength
The addition of copper and niobium (columbium) enables precipitation hardening, allowing SS 17-4 PH bolts to achieve tensile strengths up to 1310 MPa after heat treatment, far exceeding standard austenitic stainless steels.
Chromium — Corrosion Resistance
A chromium content of 15–17.5% provides good resistance to atmospheric corrosion, fresh water, and many chemicals, making these bolts suitable for marine and process environments.
Nickel — Toughness & Ductility
Nickel enhances toughness and ductility, ensuring SS 17-4 PH bolts maintain high strength and impact resistance even at low temperatures and after repeated thermal cycling.

Fastener Performance

SS 17-4 PH Bolts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for SS 17-4 PH Bolts per ASTM. SS 17-4 PH bolts achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Bolt SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M121209645
M1629523695
M20580464150
M241000800220
M3021001680350
M3636002880510
M4257004560700
M4885006800950
?? Anti-galling: Use molybdenum-based anti-seize (Molykote 1000). Lubricated values assume K=0.15. Avoid over-tightening to prevent thread galling in stainless steels.

Industry Applications

SS 17-4 PH Bolts Applications — Industries & End Uses

SS 17-4 PH Bolts from RealBolt are specified across food and dairy, pharmaceutical, marine, chemical processing, and oil and gas where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
SS 17-4 PH bolts are widely used in aircraft structural assemblies, landing gear, engine mounts, and missile components where high strength-to-weight ratio and moderate corrosion resistance are critical. AMS 5643 and ASTM A564 standards apply.
Flange bolts and stud bolts for reactor closures, pressure vessel nozzles, and heat exchanger channel covers in environments where both high strength and resistance to stress corrosion cracking are required.
Turbine casing bolts, HRSG duct connections, and high-pressure steam piping flanges where elevated temperature strength and resistance to thermal cycling are essential.
Hex bolts and stud bolts for marine pump housings, offshore platform structural joints, and propeller shaft couplings where moderate corrosion resistance and high mechanical strength are needed.

SS 17-4 PH Bolts Standards & International Certifications

SS 17-4 PH Bolts from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, IS 12427 compliance, ISO 3506 material certification, NACE MR0175, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 931 DIN 933 DIN 960 DIN 961 ISO 4014 ISO 4017 ISO 8676 ISO 8765 ASME B18.2.1 EN ISO 4014 EN ISO 4017 BS EN ISO 4014 BS EN ISO 4017 IS 1363 IS 1364 IS 12427 SAE J429 UNI 5737 UNI 5739 CSN 021101 CSN 021103 PN 82101 PN 82105
Certifications
ISO 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2

Buy SS 17-4 PH Bolts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified SS 17-4 PH Bolts — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
022-6743-7972
+91 90226 36025
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Answers for Buyers

SS 17-4 PH Bolts — Frequently Asked Questions

Browse expert answers to common questions about SS 17-4 PH Bolts from RealBolt — covering ASTM A193/A194 grades, chloride resistance, temperature limits, sensitization, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on SS 17-4 PH bolts selection and pricing.
SS 17-4 PH hex bolts are available to DIN 931 (metric partial thread), DIN 933 (metric full thread), ISO 4014/4017, and ASME B18.2.1 (inch hex and heavy hex). Stud bolts are supplied per ASME B16.5 for flange applications. Custom thread forms (BSW, BSF, Whitworth, BSPP) are available on request with 15 working day lead time.
Molybdenum-based anti-seize compound (such as Molykote 1000 or Loctite LB 8012) is recommended for SS 17-4 PH bolts. Apply to threads and nut bearing face to prevent galling. Reduce torque values by 20% for lubricated assembly. Avoid copper-based anti-seize to prevent galvanic corrosion.
Yes – SS 17-4 PH bolts offer good resistance to atmospheric and fresh water corrosion, making them suitable for marine and offshore structural applications. However, for prolonged immersion in seawater or highly aggressive chloride environments, duplex or super duplex stainless bolts may be preferred.
No formal MOQ for standard sizes (M12-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes and heat treatments have an MOQ of 10 kg minimum. Flange stud bolt sets are supplied by the set with no minimum. Quantity price breaks at 50 pcs, 200 pcs, and 500 pcs.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil