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17/4PH

17/4PH Stockist Range

Product FormRange FromRange To
17/4PH Plate icon

17/4PH Plate

6.35mm76.2mm
17/4PH Round Bar icon

17/4PH Round Bar

6.35mm640mm
17/4PH Square Bar icon

17/4PH Square Bar

70x70mm
17/4PH Flat Bar icon

17/4PH Flat Bar

180x70mm
17/4PH Sheet icon

17/4PH Sheet

4.0mm

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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 such as: undercarriage components and fasteners, rocket fittings and other structural parts
    • 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, foils and helicopter deck platforms

    17/4PH Composition

    Mechanical Properties

    Yield StrengthKSI (MPa)≥ 105 (725)
    Tensile StrengthKSI (MPa)≥ 124 (860)
    HardnessHB≥255
    Elongation%≥16
    Impact Charpy-V -46°CJ≥41

    Technical Specifications

    ASTMUNSWerkstoffAISI
    A564S174001.4542630 Type 630

    Chemistry

    NickelNi3.0-5.0
    IronFeBalance
    CarbonC0.7 Max
    SiliconSi1.0 Max
    ManganeseMn1.00 Max
    SulphurS0.030 Max
    PhosphorusP0.040 Max
    ChromiumCr15.00-17.50 Max
    CopperCu3.0-5.0
    NiobiumNb0.15-0.45

    Physical Properties

    Densityg/cm³7.82
    Melting Point°F2560-2625
    °C1404-1440
    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

    17-4PH Stainless Steel Suppliers

    17/4PH is a high-strength, stainless steel made up of chromium, nickel, copper and niobium. With precipitation-hardening and martensitic qualities, it is both tough and corrosion-resistant. The alloy 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, either by calling us or messaging us using any of the contact forms on our website.

    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.