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17 4PH Stainless Steel Suppliers

17-4PH (also known as Alloy 17-4) is a high-strength, stainless steel made up of chromium, nickel, copper and niobium. With precipitation-hardening and martensitic qualities, alloy 17-4 is both tough and corrosion-resistant. 17-4PH maintains high tensile strength and hardness, up to 316°C, and excellent oxidation resistance up to 593°C. Alloy 17-4 also has good creep-stress rupture properties up to 482°C.

Speak to City Special Metals today if you would like to place an order for 17-4PH material - we can supply in many forms, including plate, round bar and sheet. To get in touch, please call us, or leave us a message using the contact form below.

17-4PH Stockist Range

Product FormRange FromRange To
17-4PH Plate icon

17-4PH Plate

17/4PH Round Bar icon

17/4PH Round Bar

17/4PH Square Bar icon

17/4PH Square Bar

17/4PH Flat Bar icon

17/4PH Flat Bar

17/4PH Sheet icon

17/4PH Sheet


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    Beneficial Properties

    • Flexibility Good workability, weldability and easy to machine
    • Corrosion-Resistant High resistance to certain corrosive environments and elements, fatigue and wear
    • Durability Strong performance, toughness and resilience
    • Magnetic Permeability A high measure of magnetic permeability

    Markets & Applications

    • Aerospace manufacture (undercarriage components, fasteners, rocket fittings
    • Paper mill equipment
    • Nuclear waste casks and production
    • Mechanical components such as: springs, screws, bolts, gears
    • Chemical processing plants and oil and gas production
    • Offshore and marine mechanical components
    • Helicopter deck platforms and foils
    Call City Special Metals +44 1268 774 261

    17-4PH Composition

    Mechanical Properties

    Yield StrengthKSI (MPa)≥ 105 (725)
    Tensile StrengthKSI (MPa)≥ 124 (860)
    Impact Charpy-V -46°CJ≥41

    Technical Specifications

    A564S174001.4542630 Type 630


    CarbonC0.7 Max
    SiliconSi1.0 Max
    ManganeseMn1.00 Max
    SulphurS0.030 Max
    PhosphorusP0.040 Max
    ChromiumCr15.00-17.50 Max

    Physical Properties

    Melting Point°F2560-2625
    Modulus of Elasticity at 20°CMPa196000
    Thermal Conductivity at 20°CW/m.K18.4
    Thermal Expansionx10-6/K10.8
    Electrical Resistivity10-6Ω.m0.08
    Poisson’s ratio0.272

    Contact us about Alloy 17-4 using the details below

    Whether you’re looking for a bulk order of 17 4 PH stainless steel plate, or you need advice on which 17 4PH material would be right for your application, speak to City Special Metals.

    Call City Special Metals +44 1268 774 261

    We offer a bespoke service so, if you don’t see the size or form that you require, contact us either by phone, email or our contact form below, and we will provide a solution to your requirements.