45-inch thick-walled seamless steel tubes are made by piercing ingots or solid billets to form rough tubes, which are then hot rolled, cold rolled, or cold drawn to finish.

45-inch thick wall seamless steel pipe chemical composition

Carbon (C): 0.42-0.50, Silicon (Si): ≤0.40, Manganese (Mn): 0.50-0.80, Sulfur (S): ≤0.045, Phosphorus (P): ≤0.045, Chromium (Cr): ≤0.40, Nickel (Ni): ≤0.40, Molybdenum (Mo): ≤0.10

45mm thick wall seamless steel pipe mechanical properties

Tensile Strength σb (MPa): ≥600 (61) Yield Strength σs (MPa): ≥355 (36) Elongation δ5 (%): ≥16 Section Reduction ψ (%): ≥40 Impact Energy Akv (J): ≥39 Impact Toughness αkv (J/cm2): ≥49 (5) Hardness: Untreated, ≤229HB; Annealed Steel, ≤197HB Sample Size: 25mm

45-inch thick-walled seamless steel pipe heat treatment specification

Heat Treatment Specifications: Normalizing, 850℃; Quenching, 840℃; Tempering, 600℃.

45-inch thick-walled seamless steel pipe delivery status

Shipped in as-received or heat-treated (annealing, normalizing, or high-temperature tempering) condition. Heat-treatment condition should be specified in the contract; failure to do so will result in shipment without heat treatment.