14-4PH Stainless Steel – High Strength & Corrosion Resistant

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Product Overview

Introduction to 14-4PH Stainless Steel | UNS S17400

14-4PH Stainless Steel is a martensitic precipitation-hardening stainless steel that offers an exceptional combination of high strength, corrosion resistance, and toughness. It contains 14% Chromium and 4% Nickel, along with controlled additions of copper and molybdenum, which enhance hardenability and resistance to stress corrosion cracking.

MOKSH TUBES & FITTINGS LLP offers a wide range of 14-4PH Stainless Steel products including pipes, sheets, bars, rods, and fittings designed for superior performance in aerospace, nuclear, marine, and petrochemical industries.

This alloy delivers excellent mechanical strength and corrosion resistance even under the most demanding service conditions, making it ideal for components requiring long-term durability and reliability.

Chemical Composition of 14-4PH Stainless Steel

Element	Composition (%)
Carbon (C)	0.07 max
Chromium (Cr)	13.5 – 15.0
Nickel (Ni)	3.5 – 5.5
Molybdenum (Mo)	0.2 – 1.0
Copper (Cu)	1.5 – 2.5
Manganese (Mn)	1.0 max
Silicon (Si)	1.0 max
Phosphorus (P)	0.04 max
Sulfur (S)	0.03 max
Iron (Fe)	Balance

Technical Composition

Physical Properties of 14-4PH Stainless Steel

Property	Value
Density	7.75 g/cm³
Melting Range	1400 – 1450°C
Modulus of Elasticity	200 GPa
Thermal Conductivity	18 W/m·K
Specific Heat	500 J/kg·K

Mechanical Properties of 14-4PH Stainless Steel

Property	Condition H900	Condition H1150
Tensile Strength (MPa)	1310	930
Yield Strength (0.2% MPa)	1170	725
Elongation (%)	10	15
Hardness (HRC)	44	28

Products in 14-4PH Stainless Steel

MOKSH TUBES & FITTINGS LLP, with its extensive expertise in high-performance stainless steels and a strong global sourcing network, offers a comprehensive range of 14-4PH Stainless Steel (UNS S17400) products. Known for its exceptional mechanical strength, superior corrosion resistance, and outstanding toughness, 14-4PH is widely used in demanding industries such as Aerospace, Marine Engineering, Chemical Processing, Power Generation, Oil & Gas, and Defense.

This precipitation-hardening stainless steel grade is particularly well-suited for high-stress and high-temperature environments, where materials are required to retain structural integrity, shape, and performance under severe mechanical and thermal conditions. 14-4PH effectively meets these challenges, making it a preferred choice for critical components and applications where long-term durability, precision, and reliability are essential for operational success.

✔ Seamless Pipes

✔ Welded Pipes (ERW & EFW)

✔ Tubes (Capillary, U-Bend, Boiler & Heat Exchanger Tubes)

✔ Sheets & Plates

✔ Coils & Strips

✔ Round Bars, Flat Bars, Hex Bars, Square Bars

✔ Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)

✔ Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)

✔ Fasteners (Bolts, Nuts, Screws, Washers, Studs)

✔ Custom Fabricated Components

We offer 14-4PH Stainless Steel in a wide range of product forms.

Seamless Pipes

Welded Pipes (ERW & EFW)

Tubes (Capillary, U-Bend)

Sheets & Plates

Coils & Strips

Round Bars, Flat Bars, Hex Bars, Square Bars

Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)

Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)

Fasteners (Bolts, Nuts, Screws, Washers, Studs)

Custom Fabricated Components

Applications of 14-4PH Stainless Steel

14-4PH Stainless Steel is a high-strength, corrosion-resistant martensitic precipitation-hardening alloy widely used in demanding environments where superior mechanical properties and reliable performance are essential. Its combination of high tensile strength, toughness, and moderate corrosion resistance makes it a preferred choice across multiple industrial sectors.

Aerospace & Defense Industry

Used in critical components such as turbine blades, shafts, fasteners, and landing gear parts that demand high fatigue strength and resistance to stress corrosion cracking.

Marine & Offshore Applications

Ideal for propeller shafts, pump shafts, valve parts, and marine hardware exposed to seawater and chloride-rich environments due to its excellent mechanical stability and pitting resistance.

Oil, Gas & Petrochemical Industry

Applied in downhole tools, valves, and compressor components that operate under high pressure and corrosive atmospheres, ensuring long service life and reliability.

Power Generation & Energy Sector

Used in turbine components, bolts, and fasteners subjected to elevated temperatures and mechanical stress, ensuring strength retention and oxidation resistance.

Automotive & Motorsport Applications

Suitable for drive shafts, transmission components, and structural parts where strength-to-weight ratio and fatigue performance are critical.

Pulp & Paper Industry

Employed in machinery parts, rolls, and fittings exposed to acidic or chemical-rich process fluids, offering durability and corrosion resistance.

Food Processing & Pharmaceutical Equipment

Chosen for mixers, conveyors, and structural supports requiring both cleanliness and corrosion resistance, maintaining hygiene standards under frequent wash-down conditions.

General Engineering & Industrial Equipment

Used in springs, bolts, gears, and couplings that require high strength, dimensional stability, and excellent machinability after heat treatment.

14-4PH Stainless Steel’s unique combination of strength, corrosion resistance, and heat-treatable versatility makes it an ideal material for applications demanding long-term durability, precision, and high performance under challenging conditions.

WHY CHOOSE US?

MOKSH TUBES & FITTINGS LLP, we take pride in being a trusted name for high-performance 14-4PH Stainless Steel products. Our focus on quality, precision, and customer satisfaction makes us a preferred partner across industries.

FAQ's

What is 14-4PH Stainless Steel?

14-4PH Stainless Steel is a martensitic precipitation-hardening stainless steel containing 14% chromium and 4% nickel, with added copper and molybdenum. It offers high strength, excellent corrosion resistance, and toughness after heat treatment.

What are the main applications of 14-4PH Stainless Steel?

It is commonly used in aerospace, marine, nuclear, and petrochemical industries for manufacturing shafts, fasteners, valves, fittings, and high-stress components requiring superior mechanical strength and corrosion resistance.

How is 14-4PH Stainless Steel different from other PH grades?

Unlike other precipitation-hardening steels, 14-4PH provides a balanced combination of strength, ductility, and corrosion resistance while maintaining stability at elevated temperatures.

Can 14-4PH Stainless Steel be welded or machined easily?

Yes, 14-4PH can be welded and machined using conventional methods. It is best to perform machining in the solution-annealed condition, followed by aging treatment for optimal hardness and strength.

What are the heat treatment conditions for 14-4PH Stainless Steel?

The alloy is typically heat-treated under different conditions such as H900, H1025, and H1150, each offering distinct combinations of strength, hardness, and toughness depending on application requirements.

14-4PH Stainless Steel High-Strength Precipitation Hardening Alloy