1. 4140 4340 alloy steel bar 2. High quailty 3. Size:10mm-1000mm 4. 42CrMo4,15B36Cr,8620,4140,4340 5. Peeled+Q+T+UT We Produce the below hot rolled and hot forged 4140 4340 alloy steel bar.1. Size: 12mm-1000mm2. Grade: 4340, 4140, S45CB,15B36Cr,15B21,40MnBH,4140,42CrMo4, SUP9,SCM440,15B31,GCr15 and so on3. Deliver state: hot rolled or hot forged as per your choice.