40CrNiMoA alloy large diameter seamless Steel Pipe standard
40CrNiMoA alloy structural steel
Detailed Description:
Implementation of the standard GB/T3077-1999 .
Uniform digital code A50403 ;
Chemical composition % :
Carbon C : 0.37 ~ 0.44
Silicon Si : 0.17 ~ 0.37
Manganese Mn : 0.50 ~ 0.80
Sulfur S : Allowable residual content ≤ 0.025
Phosphorus P : Allowable residual content ≤ 0.025
Chromium Cr : 0.60 to 0.90
Nickel Ni : 1.25 to 1.65
Copper Cu : Allowable residual content ≤ 0.025
Molybdenum Mo : 0.15 ~ 0.25
Mechanical properties:
Tensile strength σb (MPa) : ≥ 980 (100)
Yield strength σs (MPa) : ≥ 835 (85)
Elongation δ5 ( % ) : ≥ 12
Area shrinkage ψ ( % ) : ≥ 55
Impact work Akv (J) : ≥ 78
Impact toughness value αkv (J/cm2) : ≥ 98(10)
Sample size: sample blank size is 25mm
Heat treatment: (quenching 850 degrees; coolant: oil; tempering temperature 600 degrees; coolant: water, oil);
Brinell hardness GBW is less than or equal to 269 ​​for steel annealing or high temperature tempering supply ;
Delivery status: Delivery by heat treatment (normalizing, annealing or high temperature tempering) or no heat treatment, the delivery status should be stated in the contract.
Uses: Used as high-strength, high-toughness, large cross-section and more important quenching and tempering parts, such as the drive eccentric shaft of the horizontal forging machine, the forging press crankshaft, etc.
Pipe clamps come in many variations as the requirements for pipe fixing can range from simple anchoring in place, to more complex scenarios involving pipe movement or heavy loads. Pipe clamps, or pipe fixings, are best defined as the support mechanism for suspended pipes, whether that be horizontal overhead or vertical, adjacent to a surface. It is essential that the right pipe clamp is used to ensure the integrity of the installation.
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