The performance grade of ball mill bolts can be divided into 10 performance grades: 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9, among which the strength bolts above 8.8 grade (including) are made of medium carbon steel and alloy steel after heat treatment, and these bolts are called high strength bolts, and the rest are generally called ordinary strength bolts.

Ball mill bolts can be divided into elliptical head bolts, square head bolts, tenon bolts, waist bolts, bucket bolts, D bolts, horn bolts and so on.

Ball mill bolts can be divided into: bulkhead lining plate bolts, grate plate bolts, step lining plate bolts, cylinder bolts, fixed cone lining plate bolts, import and export hopper lining tile bolts, bulkhead bracket bolts, manhole bolts, grid plate bolts, end cover lining plate bolts

Bolt Performance Editor

Such as:

1. Bolts with performance grade 4.8 are defined as:

(1) The nominal tensile strength of the bolt material reaches 400Mpa level;

(2) The tensile strength ratio of the bolt material is 0.8;

(3) The nominal yield strength of the bolt material is 400X0.8= 320Mpa level

2. Bolts with performance class 8.8 are defined as:

(1) The nominal tensile strength of the bolt material reaches 800Mpa level;

(2) The tensile strength ratio of the bolt material is 0.8;

(3) The nominal yield strength of the bolt material is 800x0.8 = 640Mpa level

3. Bolts with performance class 10.9 are defined as:

(1) The nominal tensile strength of the bolt material is up to 1000Mpa;

(2) The tensile strength ratio of the bolt material is 0.9;

(3) The nominal yield strength of the bolt material is up to 1000X0.9= 900Mpa grade

The meaning of bolt performance grade is the international standard, the bolt of the same performance grade, no matter the difference of material and origin, its performance is the same, the design only chooses the performance grade.The strength grade of the bolt is 10.9, which means the shear stress grade of the bolt is 10.9GPa.

Ball Mill Machinery Liner Plate Bolts ball mill bolt

1, Favorable price

2, sincere cooperation

3, Mutual benefit

4, Joint development

5. according to clients' specific requirements

washer

the washer for Liner bolt ball mill

China's current general wear resistant material series of high manganese steel series: such as high manganese steel (ZGMN13),

High manganese alloy (Zgmn13Cr2MoR), ultra-high manganese alloy (Zgmn18Cr2MoR), etc.

High manganese steel (such as ZGMN13) under severe impact or contact stress, its surface will rapidly harden, while the core still maintains a strong toughness, hard outside and tough inside both wear resistance and impact resistance.And the heavier the impact on the surface, the more full the surface hardening, the better the wear resistance.Because the hardness of high manganese steel itself is very low (HB170-230), the wear resistance is extremely limited before hardening. If the surface of high manganese steel is not enough to bear the impact force, the surface can not be fully hardened (after full hardening, the surface hardness can reach HB550 or below, otherwise), then the wear resistance will not play a role, and the wear resistance will not be shown.

Because Zgmn18Cr2 contains more manganese, the surface hardening can be more sufficient, so more wear-resistant.

Of course, ZGMN18Cr2 series (such as ZGMN18Cr2MORE) is also more expensive than ZGMN13 series.

The performance grade of ball mill bolts can be divided into 10 performance grades: 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9, among which the strength bolts above 8.8 grade (including) are made of medium carbon steel and alloy steel after heat treatment, and these bolts are called high strength bolts, and the rest are generally called ordinary strength bolts.

Non-standard fasteners

Our company is the leading manufacturer in the field of metal product, such as all kinds of non-standard fastener and its Accessories,especially various of liner bolts,nuts,gaskets and washer for more than 10 years.We have powerful production system for it.

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