20# thick-walled seamless steel pipes are made from ingots or solid billets by piercing to form rough pipes, which are then hot rolled, cold rolled, or cold drawn to produce the final product. 20# thick-walled seamless steel pipes hold a significant position in the steel pipe industry.

20# thick-walled seamless steel tube chemical composition:

Carbon C: 0.17～0.23

Silicon (Si): 0.17～0.37

Manganese (Mn): 0.35～0.65

Sulfur (S): ≤0.035

Phosphorus (P): ≤0.035

Chromium (Cr): ≤0.25

Nickel (Ni): ≤0.25

Copper (Cu): ≤0.25

20# thick-walled seamless steel pipe mechanical properties:

Tensile Strength σb (MPa): ≥410 (42)

Yield Strength σs (MPa): ≥245 (25)

Tensile elongation δ5 (%): ≥25

Section Reduction Ratio ψ (%): ≥5

Hardness: Untreated, ≤156HB

Sample Size: 25mm

20" thick wall seamless steel pipe heat treatment specifications and metallographic structure:

Heat Treatment Specification: Normalizing, 910°C, air-cooled. Microstructure: Ferrite + Pearlite.

20# thick-walled seamless steel tube delivery status:

Shipped in as-delivered condition, either unheat treated or heat treated (annealed, normalized, or high-temperature tempered). Heat treatment as-delivered must be specified in the contract; failure to do so will result in shipment without heat treatment.