SS 17-4 PH Screws Manufacturer & Exporter in India

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

-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 Screws?

SS 17-4 PH screws are high-strength, precipitation-hardening stainless steel fasteners manufactured from UNS S17400 bar stock conforming to ASTM A564. The alloys unique combination of chromium (15-17.5%), nickel (3-5%), and copper (3-5%) enables exceptional mechanical properties after heat treatment, with tensile strengths exceeding 1000 MPa in the H900 condition.

These screws offer excellent corrosion resistance in a wide range of environments, including mildly acidic and chloride-bearing atmospheres. SS 17-4 PH screws are widely specified for critical assemblies in aerospace, chemical processing, marine, and power generation where both strength and corrosion resistance are essential.

Quick Specifications

Material	SS 17-4 PH
UNS Number	S17400
DIN Number	1.4542
Material Standard	ASTM A564
Screw Standard (Metric)	DIN 912 / DIN 7991 / ISO 4762
Screw Standard (Inch)	ASME B18.3
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M3-M48 / #4-2"
Tensile Strength	1070 MPa (155 ksi) min (H900)
Yield Strength	1000 MPa (145 ksi) min (H900)
Hardness	Max 44 HRC (H900)

? 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 Nuts, 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 Nuts

SS 17-4 PH Washers

SS 17-4 PH Studs

SS 17-4 PH Threaded Rods

Technical Data

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

SS 17-4 PH Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap), DIN 7991 (countersunk), ISO 4762. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.3. All SS 17-4 PH screws dimensions are verified against applicable DIN, ISO, and ASME

Socket Head Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)	Pitch (mm)	Head Dia (mm)	Head Ht (mm)	Hex Socket (mm)	Min L (mm)	Max L (mm)
M3	0.5	5.5	3.0	2.5	6	50
M4	0.7	7.0	4.0	3.0	8	60
M5	0.8	8.5	5.0	4.0	10	70
M6	1.0	10.0	6.0	5.0	12	80
M8	1.25	13.0	8.0	6.0	16	100
M10	1.5	16.0	10.0	8.0	20	120
M12	1.75	18.0	12.0	10.0	25	150
M16	2.0	24.0	16.0	14.0	30	200
M20	2.5	30.0	20.0	17.0	35	250
M24	3.0	36.0	24.0	19.0	40	300
M30	3.5	45.0	30.0	22.0	50	400
M36	4.0	54.0	36.0	27.0	60	500
M42	4.5	63.0	42.0	32.0	70	600
M48	5.0	72.0	48.0	36.0	80	700

Dimensional & Material Standards

Standard	Covers	Thread
DIN 912	Socket head cap screws	Metric
DIN 7991	Countersunk socket screws	Metric
ISO 4762	Socket head cap screws	Metric
ASME B18.3	Socket cap, button, flat head	UNC/UNF
ISO 14581	Hexalobular socket screws	Metric

Material Standard	Requirement
ASTM A564	Bar/rod - UNS S17400
ASTM A693	Plate/sheet - 17-4 PH
AMS 5643	Aerospace bar/rod
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

SS 17-4 PH Chemical Composition

SS 17-4 PH Screws 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

Element	Composition (%)
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 Screws

Cu (3–5%) — Precipitation Hardening

Copper enables the precipitation-hardening mechanism in SS 17-4 PH, allowing screws to achieve extremely high strength after heat treatment (H900–H1150), making them ideal for high-load applications.

Cr (15–17.5%) — Corrosion Resistance

Chromium provides a passive oxide layer, giving SS 17-4 PH screws resistance to atmospheric, marine, and many chemical environments, outperforming standard martensitic stainless steels.

Nb+Ta — Grain Stability

Columbium (niobium) and tantalum stabilize the microstructure, preventing intergranular corrosion and ensuring reliable performance in welded or machined fasteners.

Fastener Performance

SS 17-4 PH Screws Mechanical Properties & Torque Reference

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

Screw Size	Dry (Nm)	Lubricated (Nm)	Clamp Load (kN)
M6	13	10	12
M8	32	25	20
M10	65	52	32
M12	110	88	45
M16	270	216	90
M20	530	424	140
M24	900	720	200

?? Anti-galling: Use molybdenum-based anti-seize (Molykote 1000). Lubricated values assume K=0.15. Avoid over-tightening to prevent thread galling in stainless steel.

Industry Applications

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

SS 17-4 PH Screws 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.

Aerospace & Defence Hardware

SS 17-4 PH screws are widely used in aircraft structural assemblies, landing gear, and engine components where high strength-to-weight ratio and corrosion resistance are critical. AMS 5643 and ASTM A564 compliance ensures reliability in demanding flight environments.

Chemical Processing Equipment

Socket head cap screws and countersunk screws for pressure vessels, agitators, and reactor closures in chemical plants. 17-4 PH offers superior resistance to stress corrosion cracking and pitting compared to standard martensitic stainless steels.

Marine & Offshore Applications

SS 17-4 PH screws are specified for marine pump housings, deck machinery, and underwater equipment where high strength and moderate corrosion resistance are required in saltwater and splash zones.

Power Generation & Turbines

Used in steam turbine casings, HRSG ductwork, and high-pressure piping supports. 17-4 PH screws maintain mechanical properties at elevated temperatures and resist chloride-induced corrosion in cooling water circuits.

SS 17-4 PH Screws Standards & International Certifications

SS 17-4 PH Screws 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 84 DIN 85 DIN 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 6912 DIN 7984 DIN 7985 DIN 7991 DIN 965 DIN 966 DIN 967 ISO 4762 ISO 10642 ISO 14579 ASME B18.3 ASME B18.6.3 EN ISO 4762 IS 1363 IS 1367 IS 12427 SAE J933

Certifications

ISO 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified SS 17-4 PH Screws — 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.

Answers for Buyers

SS 17-4 PH Screws — Frequently Asked Questions

Browse expert answers to common questions about SS 17-4 PH Screws 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 screws selection and pricing.

What screw standards are available for SS 17-4 PH socket head screws?

SS 17-4 PH socket head screws are available to DIN 912 (metric), ISO 4762, DIN 7991 (countersunk), and ASME B18.3 (inch series). Custom thread forms (UNC, UNF, BSW) and special head styles can be manufactured on request with typical lead times of 2-3 weeks.

What anti-seize should I use on SS 17-4 PH screws?

Molybdenum-based anti-seize (such as Molykote 1000 or Loctite LB 8012) is recommended for SS 17-4 PH screws to prevent galling and seizing during assembly. Apply to threads and bearing surfaces. Avoid copper-based anti-seize to prevent galvanic corrosion with stainless steel.

Are SS 17-4 PH screws suitable for marine and saltwater environments?

SS 17-4 PH screws offer good resistance to atmospheric and mild marine environments, but for full immersion or highly aggressive chloride exposure, duplex or super duplex stainless is preferred. 17-4 PH is suitable for splash zones, deck equipment, and marine hardware above the waterline.

What is the minimum order quantity (MOQ) for SS 17-4 PH screws?

No MOQ for standard sizes (M6-M24) held in stock – single piece orders are accepted for urgent requirements. Custom sizes or non-standard threads typically require a 10 kg minimum batch. Price breaks are available at 50, 200, and 500 pieces.

Industrial Cities We Serve:

Ahmedabad
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