Execution standards

ASTM A29/A29M-04

Characteristics applicable

Cold deformation plasticity is moderate, and the cutting ability of annealing and normalizing is better than that of quenching and tempering. ASTM1045 is used to manufacture parts with high strength requirements, such as gears, shafts, piston pins, and machined parts with low stress, forgings, stamped parts, bolts, nuts, and pipe joints.

Chemical composition:

Carbon C: 0.43~0.50

Silicon Si: 0.17-0.37

Manganese Mn: 0.60-0.90

Sulfur S: ≤ 0.050

Phosphorus P: ≤ 0.040

Chromium Cr: ≤ 0.25

Nickel Ni: ≤ 0.25

Copper Cu: ≤ 0.25

mechanical property 

Tensile strength σ b (MPa): ≥ 600 (61)

Yield strength σ s (MPa): ≥ 355 (36)

Elongation rate δ 5 (%): ≥ 16

Reduction of area ratio (%): ≥ 40

Impact energy Akv (J): ≥ 39

Impact toughness value α kv (J/cm2): ≥ 49 (5)

Hardness: Untreated, ≤ 229HB; Annealed steel, ≤ 197HB

Sample size: The sample size is 25mm

Metallographic structure

Heat treatment specification: Normalized, 850 ℃; Quenching, 840 ℃; Tempering, 600 ℃.

Delivery status

Delivered in a non heat treated or heat treated (annealed, normalized, or high-temperature tempered) condition. If delivery is required to be in a heat treated state, it should be specified in the contract. If not specified, delivery will be considered as non heat treated.