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SS 17-4 PH Nuts Manufacturer & Exporter in India

Explore SS 17-4 PH Nuts 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 Nuts?

SS 17-4 PH nuts are high-strength, precipitation-hardening stainless steel fasteners manufactured from UNS S17400 bar stock in accordance with ASTM A564/A693. The alloy’s unique combination of chromium (15-17.5%), nickel (3-5%), and copper (3-5%) enables heat treatment to achieve tensile strengths exceeding 1000 MPa, while maintaining excellent corrosion resistance in aggressive environments.

SS 17-4 PH nuts are widely specified for critical bolted joints in aerospace, chemical processing, and marine applications where both high mechanical strength and resistance to stress corrosion cracking are required. They are available in all standard nut forms, including hex, heavy hex, and lock nuts, and are supplied in various heat treatment conditions (H900, H1025, H1150) to suit application requirements.

Quick Specifications

MaterialSS 17-4 PH
UNS NumberS17400
DIN Number1.4542
Material StandardASTM A564 / A693
Nut Standard (Metric)DIN 934 / ISO 4032
Nut Standard (Inch)ASME B18.2.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength1000-1310 MPa (H900-H1150)
Yield Strength865-1170 MPa (H900-H1150)
Hardness28-44 HRC (condition dependent)
? All material certified by NABL-accredited laboratory. PMI and heat treatment certification 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 Bolts, 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 Bolts
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 Nuts Dimensions, Sizes & Thread Standards

SS 17-4 PH Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread forms and heavy hex per ASME B18.2.2. Metric and inch sizes available. All SS 17-4 PH nuts dimensions are verified against applicable DIN, ISO, and ASME

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)Pitch (mm)A/F (mm)Height (mm)
M61.0105.0
M81.25136.5
M101.5178.0
M121.751910.0
M162.02413.0
M202.53016.0
M243.03619.0
M303.54624.0
M364.05529.0
M424.56534.0
M485.07538.0
M565.58545.0
M646.09551.0

Dimensional & Material Standards

StandardCoversThread
DIN 934Hex nutsMetric
ISO 4032Hex nutsMetric
ASME B18.2.2Hex & heavy hex nutsUNC/UNF
ISO 7040Prevailing torque nutsMetric
DIN 985Lock nutsMetric
Material StandardRequirement
ASTM A564Bar/rod - UNS S17400
ASTM A693Plate/strip - UNS S17400
ASTM A276General fastener bar
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

SS 17-4 PH Chemical Composition

SS 17-4 PH Nuts 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 available on request.

Why SS 17-4 PH Alloy Composition Matters for Nuts

Precipitation Hardening — High Strength
The copper and niobium content in SS 17-4 PH enables precipitation hardening, allowing nuts to be heat treated to achieve tensile strengths above 1000 MPa, ideal for high-load bolted joints.
Chromium — Corrosion Resistance
With 15–17.5% chromium, SS 17-4 PH nuts resist atmospheric, marine, and many chemical environments, outperforming standard martensitic and ferritic stainless steels.
Nickel — Toughness & Ductility
Nickel content ensures good ductility and toughness, even after heat treatment, reducing the risk of brittle failure in critical applications.

Fastener Performance

SS 17-4 PH Nuts Mechanical Properties & Torque Reference

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

Nut SizeRecommended Torque (Nm)Clamp Load (kN)
M129045
M1622080
M20430125
M24750180
M301500290
M362600420
M424100580
M486100770
?? Anti-galling: Use molybdenum-based or nickel-based anti-seize. Lubricated values assume K=0.15. Avoid over-tightening to prevent thread galling.

Industry Applications

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

SS 17-4 PH Nuts 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 nuts are widely used in aircraft structural assemblies, landing gear, and engine mounts where high strength-to-weight ratio and resistance to stress corrosion cracking are critical. Qualified to AMS 5643 and ASTM A564 standards.
Hex and lock nuts for pressure vessel closures, reactor flanges, and agitator assemblies in environments containing chlorides, organic acids, and caustics where standard stainless steel nuts would fail due to stress corrosion or insufficient strength.
SS 17-4 PH nuts are specified for marine propulsion systems, offshore platform structures, and seawater piping supports, offering superior resistance to pitting and crevice corrosion compared to martensitic grades.
Used in steam turbine casings, HRSG ducting, and high-pressure flange connections where both high mechanical strength and moderate corrosion resistance are required at elevated temperatures.

SS 17-4 PH Nuts Standards & International Certifications

SS 17-4 PH Nuts 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 934 DIN 980 DIN 982 DIN 985 DIN 439 DIN 315 DIN 1587 DIN 6923 ISO 4032 ISO 7040 ISO 4161 ASME B18.2.2 EN ISO 4032 BS EN ISO 4032 IS 1363 IS 1364 IS 6623 IS 12427 SAE J995 UNI 5588 UNI 6593 CSN 021123 PN 82144
Certifications
ISO 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified SS 17-4 PH Nuts — 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 Nuts — Frequently Asked Questions

Browse expert answers to common questions about SS 17-4 PH Nuts 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 nuts selection and pricing.
SS 17-4 PH nuts are available to DIN 934 (hex nut), ISO 4032, ASME B18.2.2 (inch hex and heavy hex), and DIN 985 (lock nut). Custom prevailing torque and all-metal lock nuts can be supplied to ISO 7040 or customer specification. All nuts are manufactured from ASTM A564/A693 bar or plate and supplied in the required heat treatment condition.
Molybdenum-based or nickel-based anti-seize (such as Molykote P-37 or Never-Seez Pure Nickel) is recommended for SS 17-4 PH nuts, especially in high-load or high-temperature applications. Apply to threads and nut faces to prevent galling and facilitate disassembly. Avoid copper-based anti-seize in chloride or marine environments.
Yes – SS 17-4 PH nuts offer excellent resistance to pitting and crevice corrosion in marine and offshore environments, outperforming martensitic and ferritic stainless steels. They are widely used in seawater-exposed bolted joints, offshore platforms, and shipbuilding. For maximum corrosion resistance, specify nuts in the H1150M condition.
No formal MOQ for standard metric and inch sizes (M8-M36) held in stock – single piece supply is available for urgent requirements. Custom sizes or special heat treatment conditions may require a 10 kg minimum. Price breaks are available at 50, 200, and 500 pieces.

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