15Mn-quality carbon structural steel 
 15Mn 
 Material Name: High quality carbon structural steel 
 Grade: 15Mn 
 Standard: GB / T 699-1988 
 Features and application: 
 15Mn high penetration of low-carbon manganese steel, 15 steel with similar performance, welding performance is good, but the hardenability, strength and plasticity than 15 steel are higher, 15Mn carbon steel used to manufacture the central part of the mechanical properties higher and the parts to be carburized. 
 15Mn chemical composition: 
 Carbon C: 0.12 ~ 0.18 
 Si Si: 0.17 ~ 0.37 
 Manganese Mn: 0.70 ~ 1.00 
 S S: ≤ 0.035 
 Phosphorus P: ≤ 0.035 
 Chromium Cr: ≤ 0.25 
 Ni-Ni: ≤ 0.30 
 Copper Cu: ≤ 0.25 
 15Mn mechanical properties: 
 Tensile strength σb (MPa): ≥ 410 (42) 
 Yield strength σs (MPa): ≥ 245 (25) 
 Elongation δ5 (%): ≥ 26 
 Reduction of area ψ (%): ≥ 55 
 Hardness: no heat treatment ≤ 163HB 
 Sample size: Sample size is 25mm 
 15Mn standard heat treatment and microstructure: 
 Heat treatment specifications: normalizing, 920 ℃. 
 15Mn Delivery status: no heat treatment or heat treatment (annealing, normalizing or tempering) the status of delivery. Requires heat treatment delivery should be specified in the contract, not indicated by no heat treatment delivery 
 15Mn-quality carbon structural steel 
 15Mn 
 Material Name: High quality carbon structural steel 
 Grade: 15Mn 
 Standard: GB / T 699-1988 
 Features and application: 
 15Mn high penetration of low-carbon manganese steel, 15 steel with similar performance, welding performance is good, but the hardenability, strength and plasticity than 15 steel are higher, 15Mn carbon steel used to manufacture the central part of the mechanical properties higher and the parts to be carburized. 
 15Mn chemical composition: 
 Carbon C: 0.12 ~ 0.18 
 Si Si: 0.17 ~ 0.37 
 Manganese Mn: 0.70 ~ 1.00 
 S S: ≤ 0.035 
 Phosphorus P: ≤ 0.035 
 Chromium Cr: ≤ 0.25 
 Ni-Ni: ≤ 0.30 
 Copper Cu: ≤ 0.25 
 15Mn mechanical properties: 
 Tensile strength σb (MPa): ≥ 410 (42) 
 Yield strength σs (MPa): ≥ 245 (25) 
 Elongation δ5 (%): ≥ 26 
 Reduction of area ψ (%): ≥ 55 
 Hardness: no heat treatment ≤ 163HB 
 Sample size: Sample size is 25mm 
 15Mn standard heat treatment and microstructure: 
 Heat treatment specifications: normalizing, 920 ℃. 
 15Mn Delivery status: no heat treatment or heat treatment (annealing, normalizing or tempering) the status of delivery. Requires heat treatment delivery should be specified in the contract, not indicated by no heat treatment delivery