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Durable Mild Steel Seamless Tube , Steam Boiler Tubes 304 Stainless Steel

Categories Alloy Steel Seamless Pipes
Brand Name: Best
Model Number: 40mm--360mm
Certification: API/CE/ISO/PED
Place of Origin: China
MOQ: 1 Pcs
Price: 500 usd/ton
Payment Terms: L/C, D/A, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 100000 Ton/Year
Delivery Time: 30 days normally, according to order quantity
Packaging Details: 30 days normally, according to order quantity
Standard: AISI, ASTM, DIN, EN, GB, JIS
Type: Round
Delivery State: Annealing/Quenching
Dimensions: 40mm--360mm
Application: Annealing/Quenching
Length: according to order(1.5m--6m)
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    • Product Details
    • Company Profile

    Durable Mild Steel Seamless Tube , Steam Boiler Tubes 304 Stainless Steel

    Product Name : 440c stainless steel round bar Round Bar : Diameter 3-800mm


    Product Information :


    Diameter40mm--360mm
    SurfaceAccording to order
    Delivery stateAnnealing/Quenching and tempering
    Lengthaccording to order(1.5m--6m)
    Toleranceaccording to order
    Product Keywordssuper duplex stainless steel plate price per kg,steel round bar,steel plate 3mm thick

    Chemical composition

    material
    C
    Si
    Mn
    P
    S
    Cr
    Ni
    Mo
    Cu
    35CrMoA
    0.34-0.39
    0.17-0.37
    0.40-0.70
    0.015
    max
    0.010
    max
    0.80-1.10
    0.30
    max
    0.15-0.25
    0.25max
    42CrMoA
    0.39-0.45
    0.17-0.37
    0.50-0.80
    0.015
    max
    0.010
    max
    0.90-1.20
    0.20
    max
    0.20-0.25
    0.25max

    Equivalent Steel Grade

    DIN
    ASTM A29
    JIS G4105
    BS
    GB

    EN ISO 10250
    1.7225
    4140
    SCM440
    708M40/708A42/709M40
    42CrMo
    42CrMo4

    Mechanical Properties

    Grade
    Tensile Strength
    Mpa
    Yield Strength
    Mpa
    Elongation
    %
    Reduction
    %
    -40℃Akv2/J
    Hardness
    10.9
    ≥1040
    ≥940
    ≥9
    ≥48
    ≥50
    HRC32-39
    8.8
    ≥830
    ≥660
    ≥12
    ≥52
    ≥70
    HRC23-34

    Surface Treatment Bar: Origin Black, Origin Annealing bright, Turned, Peeled, Grinded

    Heat Treatment/ Anealing
    1) Forging
    Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging. Do not forge below 850°C.
    2)Annealing
    Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 480°C followed by air cooling.
    3)Stress Relieving
    When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.
    4)Hardening
    AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.
    5)Tempering
    Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.


    Quality :


    Our products will be from black round bar. We will order the raw material from first class steel making companies to guarantee the inner quality. You can also lock the raw material manufacturer for your order.

    We will continually improves and expands the quantity and quality of our product which exactly meet customers need. We do whatever it takes to make our clients happy.
    We will develop long-term commercial and technical partnerships with customers. And we are committed to continual quality improvement of all internal processes. The success of our quality program is affirmed by our strong customer retention rate.


    Certification :


    Achieving the ISO 9001:2008 Certification is just one example of our Products’ dedication to quality and continuous improvement. Each employee is responsible for understanding company expectations and adhering to the procedures of our Quality Management System.
    Our Products ensures customers receive the material ordered with accurate supporting paperwork. Customers can count on proper documentation, on-time performance and effective follow-up.


    Our company

    Our story
    Since beginning operation in 1996, We has been dedicated to providing more than just material supply, We has helped customers reduce costs and improve the bottom line. This approach to partnering with customers has made our Products a leader among Steel Round bar and one of the fastest growing companies in China.


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