● Features and application:
Alloy structural steel SCr430 compared with 30 steel, strength and hardenability are high, usually steel, alloy steel SCr430 used in quenched and tempered condition, can also be used after normalizing. Alloy structural steel SCr430 for wear and a great impact on the work load of the important parts such as shafts, small axes, balance levers, rocker, rod, bolts, nuts, gears, and a variety of roller, etc.; can also be used be subject to surface hardened parts.
● Chemical Composition:
Carbon C: 0.28 ~ 0.33
Si Si: 0.15 ~ 0.35
Manganese Mn: 0.60 ~ 0.90
Sulfur S: to allow the residual content ≤ 0.030
Phosphorus P: to allow the residual content ≤ 0.030
Chromium Cr: 0.80 ~ 1.10
Ni: to allow the residual content of ≤ 0.25 Copper Cu: to allow the residual content ≤ 0.030
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 885 (90)
Yield strength σs (MPa): ≥ 685 (70)
Elongation δ5 (%): ≥ 11
Reduction of area ψ (%): ≥ 45
Impact energy Akv (J): ≥ 47
Impact toughness αkv (J/cm2): ≥ 59 (6)
Hardness: ≤ 187HB
Sample size: Sample size is 25mm rough
● Heat treatment and microstructure specifications:
Standard heat treatment: quenching 860 ℃, oil cooling; tempering 500 ℃, water-cooled, oil-cooling.
● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.
