1. Chemical composition
C: 1.00 ~ 1.10 (promised error: ± 0.01) Si: 0.20 ~ 0.45 (promised error: ± 0.05)
Mn:0.15 ~ 0.40 to bias: 0.04 S ≤ 0.030 P ≤ 0.030
Cr: 3.75 ~ 4.50 to bias: ± 0.05 Ni: promise residual content ≤ 0.30
Cu: promise residual content ≤ 0.25 V:2.25 ~ 2.75 (promised error: ± 0.05)
Mo:4.75 ~ 6.50 (promise: size deviation ≤ 6, ± 0.05; > 6, + 0.10)
Tungsten W:5.00 ~ 6.75 (promise: size deviation ≤ 10, ± 0.10; > 10, + 0.20)
2. Heat treatment process
Specification: heat treatment quenching, 730 ~ 840 ℃ preheated, 1190 ~ 1210 ℃ (salt bath furnace) or 1200 ~ 1220 ℃ (box-type furnace) heating, oil cooling, 540 ~ 560 ℃ tempering 2 times, each time 2h.
3. Delivery status
Hot rolling, forging, cold drawn steel bars in annealing state delivery, rolled, forged steel bar with annealing + other processing methods (skin, gently pull, grinding or polishing processing before delivery)
4.Brand name：Yuji
5.Delivery time：7-15days after receiving advanced payment
6.Packing detail：under requirement
7.Supplying Ability：800Tons/month
8.Place of origin：China
9. MOQ: 20tons easy for containers loading
10.Payment：T/T L/C
