China 4140 Oval Head Bolt 42CrMo High Strength Cement Mill Liner Bolts M48X150mm Hardware Bolts

Material Grade:4140(42CrMo)

Quality Level: 12.9, 10.9, 8.8, 6.8, 4.8 Grade

Sizes: M20,M24,M27,M30,M36,M42,M45,M48,M72,M100

Specification:M48 x 150,M48 x 180,M48 x 210,M48 x 330,M48 x 370,M48 x 390,M48 x 600,M48 x 700,M48 x 900,M48 x 1080

Bolt-head Shape: Oval head, Square head,Ellipse head;

Special Features:

1. The high strength bolts have been widely used in large ball mills up to dia.12-meter mills.

2. The high strength screws can be reliably used in small,middle and large cement mills,coal mils and mine mills.

3. The high strength bolts have been properly heat-treated to achieve better mechanical properties.

4. The standard bolt units include one rubber ring,concave washer,spring washer and nut.

Chemical Composition:

Composition(%)

C

Si

Mn

S

P

Cr

Mo

42CrMo(4140 Grade8.8)

0.38-0.45

≤0.40

0.60-0.90

≤0.035

≤0.035

0.90-1.20

0.15-0.30