Mechanical Properties of Chinese low alloy steel: Q345B

Q345B steel is a Chinese standardized low alloy, medium tensile strength steel made with a hot-rolling process, and is used for a number of manufacturing purposes. It is a steel with less than 0.2 percent of its composition made up of carbon, less than 0.55 percent of its composition made of silicon and several impurities (mostly sulfur, chromium and nickel). This particular grade of steel is a 'general purpose' manufacturing steel in construction equipment field, such as Q345B is basic material of making excavator bucket and excavator boom arm attachments

The major benefit of this grade of steel is its mild temper. It's easy to form and easy to weld,

Mechanical Properties

1, Yield Strength

A yield strength or yield point is the material property defined as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its original shape when the applied stress is removed, Yield strength of Q345B is 345 MegaPascals. Like most steels of its grade, it suffers elongation before it pulls apart, typically at 20-21 percent of its initial length.

2, Tensile strength

The tensile strength of a material is the maximum amount of tensile stress that it can take before failure, for example breaking. Steel tensile strength is expressed in units of force divided by cross sectional area; in the Metric system, this unit is known as the Pascal. One Pascal is a Newton (the force needed to accelerate a one kilogram object to a velocity of one meter per second) per square meter. The tensile strength of Q345B steel is rated at 470 to 660 MegaPascals (where mega is million)

3, Hardness (HB)

 Brinell scale hardness characterizes the indentation hardness of materials through the scale of penetration of an indenter, loaded on a material test-piece. It is one of several definitions of hardness in materials science, The typical test uses a 10 millimetres (0.39 in) diameter steel ball as an indenter with a 3,000 kgf (29.42 kN; 6,614 lbf) force, copper hardness is 35HB, Pure Aluminium is 15HB,

From Victory Construction Equipments Co., Ltd

Make Excavator Standard bucket firm and durable

Most excavator owner want their excavator bucket more durable and firm, but do you know the bucket structure and how to make it perform better during work? , accually that is not very hard to understand, if we want your excavator bucket more wearable, we can imagine which plate abrasing a lot when bucket do digging or loading work, or we can say which parts of excavator bucket contact material mostly, if we reinforce these wearing plates, the bucket can be more druable ? the answer is Yes,

on account of many years experience, we find out that the cutting edge, side plate, and bucket back surface abrase more than other part for the bucket, and we find out these plates wear out first during work. so as a professional bucket supplier, we care a lot about quality and excavator bucket work efficience, from above picture you can find out we add wear plates on bucket side and bucket back,and we use thicker cutting edge, to make bucket firm and avoid of deformation after undertake high strength, we add fitting gussets on bucket top and bottom.

In order to reduce bucket abrasion and improve excavator bucket working efficiency, we design excavator front cutting part wider than rear part of bucket, that can highly reduce abrasion on rear of bucket, and make your bucket use longer time.

Intact shell plate: as to the shell plate, we find out completely intact plate is neccssory for making bucket firm and avoid of deformation, so we use curved intact shell plate, the curved shape made by bending machine

Triangle structure: on the should of the bucket, it is key part to connect bucket and mounting plates, triangle structure is best shape to make it firm and avoide of deformation

For more information, pls visit our website: http://www.longreachboom.com