Grade: 1040 Standard: ASTM A29/A29M-04,
● Features and application: high strength and good machinability, cold plastic deformation of the middle, good weldability, after quenching and tempering after welding, heat treatment, no temper brittleness, but the low hardenability. Bear a greater load for a small section of quenched large pieces or small normalized stress components and less demanding on the heart of the Ministry of strength, wear-resistant surface hardening the surface of parts, such as crankshaft, spindle, shaft, connecting rod, rod, gear?,
● Chemical Composition:
● Features and application: high strength and good machinability, cold plastic deformation of the middle, good weldability, after quenching and tempering after welding, heat treatment, no temper brittleness, but the low hardenability. Bear a greater load for a small section of quenched large pieces or small normalized stress components and less demanding on the heart of the Ministry of strength, wear-resistant surface hardening the surface of parts, such as crankshaft, spindle, shaft, connecting rod, rod, gear?,
● Chemical Composition:
|
Carbon C |
Si Si |
Manganese Mn |
Sulfur S |
Phosphorus P |
Chromium Cr |
Ni-Ni |
Copper Cu |
|
0.37～0.44 |
0.17～0.37 |
0.60～0.90 |
≤0.050 |
≤0.040 |
≤0.25 |
≤0.25 |
≤0.25 |
● Mechanical Properties: Tensile strength σb (MPa): ≥ 570 (58), yield strength σs (MPa): ≥ 335 (34) Elongation δ5 (%): ≥ 19, Reduction of ψ (%): ≥ 45 impact energy Akv (J): ≥ 47, the impact toughness values αkv (J/cm2): ≥ 59 (6), hardness: no heat treatment, ≤ 217HB; annealed steel, ≤ 187HB, sample size: Sample size is 25mm , ● heat treatment and microstructure specifications: standard heat treatment: normalizing, 860 ℃; quenching, 840 ℃; tempering, 600 ℃. ● Delivery status: no heat treatment or heat treatment (annealing, normalizing or tempering) the status of delivery.
