Steel round rod

flat barfor springs

1. Material: 50CrVA. 3. Certificate: ISO9001:2008 4. Chemical composition: C: 0.46-0.54; Si: 0.17-0.37; Mn: 0.50-0.80; S:0.030max; P: 0.030max; Cr: 0.80-1.10; Ni: 0.35max; Cu: 0.25max; V: 0.10-0.20 5. Mechanical properties: Tensile strength(Mpa) Yield strength Elongation Reduction of area min1274(130) - min1127(115) - min10 - min40 6. State of delivery: Hot rolled, hot treat, cold rolled and so on. 7. Heat treatment standard: Hardening 850 °C+/-20 °C; Oil cooling: tempering 500 °C+/-50 °C. (Special: +/-30 °C). 8. Hardness: Hot rolled+ hot treatment: 321HB max Cold drawn+ hot treatment: 321HB max.