Carbon structural steel is refers to the carbon mass fraction is 0.8% ~ 1.0% of the iron carbon alloy. Also known as common low carbon structural steel and ordinary carbon structural steel. The alloy’s total quality is composed of iron, carbon, and traces of other elements, carbon content accounts for about 0.4% ~ 0.7%. In addition to carbon, also have a small amount of silicon, manganese, sulfur and phosphorus.

The advantages of cold-rolled carbon structural steel

Cold-rolled carbon structural steel is widely used in vehicles, machinery, pressure vessels, Bridges, buildings, etc. Cold-rolled carbon structural steel has superior strength and durability, is the ideal material widely used. The following are some of the benefits using cold-rolled carbon structural steel:

1. Improve the strength and durability

cold-rolled carbon structural steel are much more robust than other types of steel. This makes its strength and durability is critical to the application of the ideal choice.

2. Improve the appearance. Surface finish cold rolling process leading to more smooth than hot rolled steel, more polished surface finish. This makes cold-rolled carbon structural steel is very suitable for the application as need high finish.

3. Improve the dimensional accuracy

Cold rolling process to improve the size precision of the finished product. This is vital for accurate size application special favor.

Product grades and USES

Grades—-USES

St37-2G —-structure
St44-3G—- structure
St52-3G— structure, reinforcement

Products of steel plate and steel belt mark way

Steel plate and steel belt complete tag should include the following contents:
Product name (steel plate or steel belt)

This product standard number

Surface quality of the code

The surface structure

Margin status (trimming EC, trimming EM)

Product specification and size, and shape accuracy (thickness and/or the width, length, roughness)

Tag sample:
(1) the steel plates, the standard number O/BOB410, brand St37-2 g, for special smooth surface structure, (b), the surface quality for FC, trimming (EC); Thickness of 0.8 mm, A level precision, width 1200 mm, A level precision, length is 2000 mm, A level precision. Roughness of PF. B precision, marked as:
Steel plate EC Q/BQB St37 410-2 g – FC – b/(0.8 Ax
1200 ax2000a the zanu-pf. B)

(2) the steel belt, standard no. 410, Q/BQB brand St37-2 g, the surface quality of FB, surface structure is lacklustre (m), trimming (EC), the thickness of 0.8 mm, B precision, width 1200 mm, A level precision, marked as:
Steel belt EC O/BOB410St37-2 g – FB – m/(0.80 Bx
1200 a) 4/10

The surface quality of the product

1）FB(03)——More advanced finishing surface：Surface allowed will not affect the formability and a small amount of coating, coating adhesion of defects, such as minor scratches, indentation, pitting, roller and oxidation color.

2）FC(04)——Advanced finishing surface：Products on both sides of the good side not visible to the naked eye obvious defect, on the other side must be at least as to meet the requirement of FB.

The chemical composition of carbon structural steel

The mechanical properties of the products

Similar grades