65# 70# 75# 85# 65Mn 55Si2Mn 60Si2Mn 60Si2CrA 50CrMn 50CrVA Spring steel 1.Size:20-180mm 2MOQ:20mt

65# 70# 75# 85# 65Mn 55Si2Mn 60Si2Mn 60Si2CrA 50CrMn 50CrVA Spring steel

1.quality:65# 70# 75# 85# 65Mn 55Si2Mn 60Si2Mn 60Si2CrA 50CrMn 50CrVA Sup3 Sup6 Sup7 Sup9 Sup10 Sup11A CK67 C75 55Si7 65Si7 67SiCr5 55Cr3 50CrV4 ASTM1064 1065 ASTM1070 ASTM1084 ASTM1566 ASTM9255 ASTM9260 ASTM9254 ASTM6150

2.Size: 20-180mm

3.MOQ:20MT

4.Chemical composition:

Grade	C	Si	Mn	Cr	Mo	V	B
65# (CK67 C67)	0.62 0.70	0.17 0.37	0.50 0.80	Max 0.25
70# (CK67 C67)	0.62 0.75	0.17 0.37	0.50 0.80	Max 0.25
85# (SUP3)	0.82 0.90	0.17 0.37	0.50 0.80	Max 0.25
65Mn	0.62 0.70	0.17 0.37	0.90 1.20	Max 0.25
55Si2Mn (SUP6) (55Si7)	0.52 0.60	1.50 2.00	0.60 0.90	Max 0.35
60Si2Mn (SUP7) (65Si7)	0.56 0.64	1.50 2.00	0.60 0.90	Max 0.35
60Si2CrA (67SiCr5)	0.56 0.64	1.40 1.80	0.40 0.70	0.70 1.00
50CrMn (SUP9) (55Cr3)	0.52 0.60	0.17 0.37	0.65 0.95	0.65 0.95
50CrVA (SUP10) (50CrV4)	0.46 0.54	0.17 0.37	0.50 0.80	0.80 1.10		0.10 0.20

5.

Quality Contation

Both end of each bar must be cut.

Ladle furnanced and vacuum de-gassed

Show heat No. on each bar

Surface condition the surface of the hot rolled square bar shall befree cracks, scar and wrinkles that affect the use of the billets. In case there is the above-mentioned defect, it shall be remove.

The mill test certificate shall show the chemical composition, and it is guaranteed that the chemical composition shall be within the limit stipulated in the contract.

65# 70# 75# 85# 65Mn 55Si2Mn 60Si2Mn 60Si2CrA 50CrMn 50CrVA Spring steel