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UNS S17400 Precipitation Hardening Stainless Steel , Special Alloys For Jet Engines

Categories Special Alloys For Aerospace And Defense
Brand Name: CMMC
Model Number: As per specification and drawing
Certification: API, PED etc.
Place of Origin: CMMC in CHINA
MOQ: 1000 kilogram
Price: Negotiable
Payment Terms: D/P, L/C, T/T
Supply Ability: 300 metric tons per month
Delivery Time: 60-90 days
Packaging Details: Water prevent, seaworthy transport, non-fumigation wooden box
Material: UNS S17400, 17-4PH, AISI 630, a chromium-nickel-copper precipitation hardening martensitic stainless steel
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    UNS S17400 Precipitation Hardening Stainless Steel , Special Alloys For Jet Engines

    Precipitation hardening stainless steel UNS S17400, 17-4PH, AISI 630 for jet engines and land vehicle structures


    PRODUCT

    Precipitation hardening stainless steel UNS S17400, 17-4PH, AISI 630 for jet engines and land vehicle structures, etc.


    EQUIVALENT DESIGNATION

    0Cr17Ni4Cu4Nb, 17-4PH, AISI 630, SUS 630, W.Nr. 1.4542, X5CrNiCuNb16-4


    PRODUCT FORM

    Product available in bar (round, flat, hexagon, square, section), wire, forgings, tube, ring, plate, sheet and strip, etc. In all forms, the material is furnished in annealed condition.


    OVERVIEW

    S17400 is a chromium-nickel-copper precipitation hardening martensitic stainless steel used for applications requiring high strength and hardness along with a moderate level of corrosion resistance. High strength is maintained to approximately 600℉ (316℃). This alloy is designated Grade or Type 630 in several specifications.

    S17400 alloy is martensitic in structure in the annealed condition and is further strengthened by a low temperature treatment which precipitates a copper containing phase in the alloy. In comparison to many alloys in the precipitation hardening family, the S17400 alloy requires a simple heat treatment; a one step process conducted at a temperature in the range 900℉ (482℃) to 1150℉(621℃) depending on the combination of strength and toughness desired. A wide range of properties can be produced by this one step heat treatment. Heat treatment in the 900℉ (482℃) range produces highest strength, although slightly less than that of alloys like S17700 or S15700. The latter precipitation hardening stainless steels generally require more steps to complete heat treatment.


    APPLICATION

    Offshore platform, helicopter deck other platforms

    Food processing

    Pulp and paper industry

    Aerospace (Aircraft and gas turbine blade)

    Mechanical components

    Nuclear reactor

    Oil field

    Chemical process components

    General metalworking industry


    CHEMICAL COMPOSITION (wt%):

    FeNiNbCrCuMoTa
    Bal.3.0-5.05xC-0.4515.5-17.53.0-5.0≤0.60≤0.45
    CMnSiPSNb+Ta
    ≤0.07≤1.00≤0.70≤0.035≤0.0300.15-0.45

    PHYSICAL PROPERTY

    Melting point:1400-1440℃

    Density: 7.75g/cm3


    CORROSION RESISTANCE

    S17400 alloy has superior corrosion resistance to any other standard hardened stainless steel.

    Tests have shown that the corrosion resistance of S17400l is comparable to that of Type 304 stainless steel in most media. In general, the corrosion resistance of S17400 alloy is superior to that of the hardenable 400 series stainless steels. As with other precipitation hardening stainless steels, S17400 is more susceptible to stress corrosion cracking at peak strength. Consequently, in applications where chloride stress corrosion cracking is a possibility, the material should be precipitation hardened to produce the lowest hardness compatible with the intended end use. This is done by heat treating at the highest temperature which will produce suitable minimum properties.

    Material in the annealed condition should not generally be put into service. In this condition, the material has an untempered martensite structure and is less ductile than aged material. The untempered martensite may be subject to unpredictable brittle fractures. In corrosive environments, the untempered martensite is more sensitive to embrittling phenomena such as hydrogen embrittlement than material that has had one of the precipitation hardening heat treatments. Similarly, untempered martensite is more sensitive to chloride stress corrosion cracking than material in which the martensite has been tempered.

    This alloy is susceptible to corrosion or crack corrosion in static seawater

    It has the same resistance to corrosion in the petrochemicalm, food processing and paper industry as the 304L grade.


    MECHANICAL PROPERTIES

    Room temperature tensile properties can vary substantially with heat treatment in the 900℉(482℃) to 1150℉(621℃) range. Values shown below are typical room temperature properties that may be expected for various precipitation hardening heat treatments as well as for the 1950℉(1066℃) solution heat treatment.

    Condition0.2% Yield strength
    ksi (MPa)
    Tensile strength
    ksi(MPa)
    Elongation % in 2D% Reduction of AreaHardness
    Rc (HB)
    H900170(1170)190(1310)104040-47(388-444)
    H1075125(860)145(1000)134433-39(311-375)
    H1150105(725)135(930)165028-37(277-352)

    HEAT TREATMENT

    Solution heat treatment

    Heat treat to produce martensitic structure, solution heat treatment shall be soaked at 1900-1950℉(1038-1066℃) for 30 min and followed cooling rapidly below 16℃ (60℉) for complete martensite transformation.

    Precipitation heat treatment

    Precipitation heat treatment to produce desired strength as table below

    ConditionTemperatureTime
    H900900±10℉(482±5℃)60 min. ± 5 min.
    H10751075±10℉(579±5℃)4 hrs ± 0.25 hr
    H11501150±10℉(621±5℃)4 hrs ± 0.25 hr

    FORMABILITY

    The tensile data for the S17400 precipitation hardening stainless steel indicate that the alloy does not possess the high tensile elongation characteristic of the austenitic stainless steels. The material is capable of being mildly formed but is not capable of being severely formed. Forming is more easily accomplished in the overaged (such as H1150-M from SA693) condition than in the annealed condition.

    FORGING

    S17400 stainless steel is forged at 1010℃(1850℉). Before performing this process, it is soaked at 1177℃(2150℉). Post-work solution treatment should be performed before final hardening.

    HOT WORKING

    S17400 stainless steel can be hot worked using common processes. It is treated at 1038℃(1900℉). Post-work solution treatment should be performed before final hardening.

    COLD WORKING

    S17400 stainless steel can be cold worked using common techniques in spite of its high initial yield strength.


    STANDARD SPECIFICATION

    AMS 5342 / AMS 5343 / AMS 5344 / AMS 5355 Corrosion resistant steel, Investment Castings

    AMS 5604 Sheet, Strip and Plate

    AMS 5622 Steel Bars, Wire, Forgings, Tubing, and Rings

    AMS 5643 Bars, Forgings, Tubing and Rings

    AMS 5825 Steel, Corrosion-Resistant, Welding Wire 16.4Cr - 4.8Ni - 0.22Cb(Nb) - 3.6Cu

    AMS 5827 Welding Electrodes

    AMS 7474 Bolts

    ASTM A564 / ASTM SA564 Bars, Wire and Shapes

    ASTM A693 / ASME SA693 Sheet, Plate and Strip

    ASTM A705 / ASME SA705 Forgings

    SAE J467(17-4PH) Special Purpose Alloys ("Superalloys")

    MIL-S-81506

    MIL-C-24111

    MIL-P-47183

    MIL-S-81591 Military specification: steel, investment castings

    EN 10088-3 Semi-finished product, bar, rod, wire, section and bright bar.

    EN 10250-4 Open die stainless steel forgings for general engineering purpose

    GB/T 1220 Stainless steel bar

    GJB 2294 Specification for stainless and heat resisting steel bar for aviation


    COMPETITIVE ADVANTAGE:

    More than 50 years experience of research and develop in high temperature alloy, corrosion resistance alloy, precision alloy, refractory alloy, rare metal and precious metal material and products.
    (2) 6 state key laboratories and calibration center.
    (3) Hundreds of patent technologies.
    (4) Our defense serves the needs of government defense departments, defense contractors and fabricators in the China and allied countries with an unsurpassed array of specialty materials and armor products, engineering, and technical services. Our products and services are used for many critical land-based vehicle applications.


    DESCRIPTION:

    MaterialUNS S17400
    Equivalent designation0Cr17Ni4Cu4Nb, 17-4PH, AISI630, SUS630, W.Nr. 1.4542, X5CrNiCuNb16-4
    StandardSee above information
    Heat treatmentSolution annealed, precipitation hardened
    Size rangeAs per order
    CertificateSee above information
    ApplicationSee preceding information

    BUSINESS TERM

    Minimum Order Quantity1000 kilogram
    PriceNegotiable
    Packaging DetailsWater prevent, seaworthy transport, non-fumigation wooden box
    MarkAs per order
    Delivery Time60-90 days
    Payment TermsT/T, L/C at sight, D/P
    Supply Ability300 metric tons per month

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