Wholesale Baosteel sae8620 round steel performance SAE8620H wire rod round price cold drawn bright rod

  Manganese mn:0
70 ~ 0
90 sulfur s: allowable residual content ≤ zero point zero three five
Phosphorus P: allowable residual content ≤ zero point zero three five
Chromium cr:0
40 ~ 0
60
Nickel ni:0
40 ~ 0
70
Copper Cu: allowable residual content ≤ zero point three zero
Mo:0
15 ~ 0
25
Tensile strength σ b (MPa)：≥ 980(100)
Yield strength σ s (MPa)：≥ 785(80)
Elongation δ 5 (%)：≥ nine
Reduction of area ψ (%)：≥ forty
Impact energy Akv (J): ≥ forty-seven
Impact toughness value α kv (J/cm2)：≥ 59(6)
Hardness: ≤ 197HB
Sample size: sample blank size is 15mm
Quenching 850 ℃, oil cooling; Tempering 200 ℃, air cooling