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51 steel pipe network () to provide: 20 # seamless steel pipe 20 # seamless steel pipe material is 20 steel, generally 20 seamless steel pipe 20 # steel material is: high quality carbon structural steel grade: 20 steel standard: GB/T 699-1988
â— 20 # seamless steel pipe characteristics and application:
The strength is slightly higher than that of No. 15 steel, rarely quenched, and has no temper brittleness. Cold deformation high plasticity, general for bending, rolling, crimping and hammer arch processing, arc welding and contact welding welding performance, gas welding thickness is small, strict shape or complex shape of the parts are prone to cracking. Machinability Cold drawing or normalizing is better than annealing. It is generally used for manufacturing with low stress and high toughness requirements.
â—20# seamless steel tube chemical composition:
Carbon C: 0.17 to 0.24 "silicon Si: 0.17 to 0.37 manganese Mn: 0.35 to 0.65 sulfur S: ≤ 0.035 phosphorus P: 0.035 chromium Cr: 0.25 nickel Ni: 0.25 copper Cu: 0.25
â— 20 # seamless steel pipe mechanical properties:
Tensile strength σb (MPa): ≥410 (42) Yield strength σs (MPa): ≥ 245 (25) Elongation δ5 (%): ≥25 Section shrinkage ψ (%): ≥ 5, Hardness: Not treated , ≤156HB, sample size: sample size 25mm
â—20# seamless steel tube heat treatment specification and metallographic structure:
Heat treatment specifications: normalizing, 910°C, air cooling. Metallographic structure: ferrite + pearlite.
â— 20# Seamless Pipe Delivery Status: Delivery with no heat treatment or heat treatment (annealing, normalizing or high temperature tempering). The requirements for the delivery of heat treatment shall be specified in the contract, and those not specified shall be delivered without heat treatment.
â— 20 # seamless steel pipe characteristics and application:
The strength is slightly higher than that of No. 15 steel, rarely quenched, and has no temper brittleness. Cold deformation high plasticity, general for bending, rolling, crimping and hammer arch processing, arc welding and contact welding welding performance, gas welding thickness is small, strict shape or complex shape of the parts are prone to cracking. Machinability Cold drawing or normalizing is better than annealing. It is generally used for manufacturing with low stress and high toughness requirements.
â—20# seamless steel tube chemical composition:
Carbon C: 0.17 to 0.24 "silicon Si: 0.17 to 0.37 manganese Mn: 0.35 to 0.65 sulfur S: ≤ 0.035 phosphorus P: 0.035 chromium Cr: 0.25 nickel Ni: 0.25 copper Cu: 0.25
â— 20 # seamless steel pipe mechanical properties:
Tensile strength σb (MPa): ≥410 (42) Yield strength σs (MPa): ≥ 245 (25) Elongation δ5 (%): ≥25 Section shrinkage ψ (%): ≥ 5, Hardness: Not treated , ≤156HB, sample size: sample size 25mm
â—20# seamless steel tube heat treatment specification and metallographic structure:
Heat treatment specifications: normalizing, 910°C, air cooling. Metallographic structure: ferrite + pearlite.
â— 20# Seamless Pipe Delivery Status: Delivery with no heat treatment or heat treatment (annealing, normalizing or high temperature tempering). The requirements for the delivery of heat treatment shall be specified in the contract, and those not specified shall be delivered without heat treatment.
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