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2016 stainless steel pipe for oil and gas industry in grade 4130/4140/P110

Port: Hu nan

Supply Ability: 10000 Ton/Tons per Year

Min.Order Quantity: 15 Tonne/Tonnes

E-mail:export@qilucs.com

  • 304/304L,316/316L,316Ti,321,310S,317L,321H,304H,347H,904L,etc.

    General Information:

    Ni-Cr-Mo steel characterized by high level harden ability and toughness, good resistance to repeated shocks, fairly good insensitivity to thermal shocks and good wear resistance.

    Comparable Standards:                                                                                                       

    AISI/SAE DIN W.Nr. AFNOR JIS BS SIAU GB,YB

    6F2

    56NiCrMoV7

    1.2713

    1.2714

    - SKD4 - - SCrNiMo

     

     Chemical Analysis (%):                                                                                                         

    C Mn Si Cr V Mo P S
    0.50-0.60 0.65-0.95 0.10-0.40 1.00-1.20 0.07-0.12 0.45-0.55 ≤0.03 ≤0.03

       

    Heat treatment                                                                                                       

    Isothermal annealing:

    -   Heat to 800°Cand hold at temperature for 1/2 h to 1 h;

    -   Furnace cooling to 670°Cand hold at temperature for at least 10 hours;

    -   Cool by 10°C/h to 630°C;

    -   Cooling in air.

    Maximum hardness:≤240 HB

    Stress relieving:

    To be carried out after maching before the final heat treatment.

    -   Heat to 600-650°C, hold for 4-6 hours;

    -   Cooling in furnace to 300-350°C;

    -   Cooling in air

    Hardening:

    -   Initial preheating to 350-450°C;

    -   Second preheating to 650-750°C;

    -   Heat to hardening temperature 860-890°Cand hold at temperature;

    -   Cooling in hot oil (40-60°C); oil quenched hardness: 54-59HRC;

    Tempering:

    Tempering must be carried out within one hour from hardening(warm part) in the range 550-630°Cfor 4-6 hours according to hardness required, the dimensions of the parts and operating conditions.