Material Name: high quality carbon structural steel
Grade: 15Mn
Standard: GB / T 699-1988
Features and application:
15Mn penetration of high-carbon manganese steel, 15 steel with similar performance, welding performance is good, but the hardenability, strength and ductility of steel 15 are higher than some, 15Mn carbon steel used to manufacture the central part of the mechanical properties demanding and require carburizing parts.
15Mn, compared with 30 steel with high strength and hardenability, good cold plastic deformation and welding of medium, can cut good. Tendency to temper brittleness when heat treatment and thermal sensitivity. For bolts. Nuts. Screw. Rod. A small shaft. Brake Gear.

15Mn chemical composition:

Carbon C: 0.12 ~ 0.18

Si Si: 0.17 ~ 0.37

Manganese Mn: 0.70 ~ 1.00

Sulfur 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: not heat-treated ≤ 163HB

Sample Size: Sample size is 25mm

15Mn heat treatment and microstructure specifications:

Heat treatment specifications: normalizing, 920 ℃.

15Mn Delivery status: no heat treatment or heat treatment (annealing, normalizing or tempering) the status of delivery. Demands heat treatment delivery should be specified in the contract, not indicated by no heat treatment delivery.