Q690 high - strength low - alloy steel plate is a type of steel plate with excellent performance, mainly used in the manufacture of large - scale mechanical equipment, steel structures, and other fields. Here is a detailed introduction:

Basic information1

Material name: Q690. It belongs to high - strength welded structural steel.

Standard: GB/T 1591 - 2008.

Grade classification: There are grades such as A, B, C, D, and E. The difference between each grade lies in the impact temperature. For example, the impact temperature of grade D steel plate is - 20°C, and that of grade E steel plate is - 40°C.

Chemical composition1

Main elements: Phosphorus (P) ≤ 0.025, sulfur (S) ≤ 0.020, niobium (Nb) ≤ 0.11, vanadium (V) ≤ 0.12, titanium (Ti) ≤ 0.20, chromium (Cr) ≤ 1.00, nickel (Ni) ≤ 0.80, copper (Cu) ≤ 0.80, nitrogen (N) ≤ 0.015, molybdenum (Mo) ≤ 0.30, boron (B) ≤ 0.004, aluminum (Al) ≥ 0.015.

 

Specification we supply：

Thickness	3-200mm
Width	1500-4000mm
Length	5000-15000mm

 

 

Mechanical properties1

Tensile strength: For nominal thicknesses ≤ 40mm, 770 - 940MPa; for 40 - 63mm, 750 - 920MPa; for 63 - 80mm, 730 - 900MPa.

Yield strength: For thicknesses ≤ 16mm, ≥ 690MPa; for 16 - 40mm, ≥ 670MPa; for 40 - 63mm, ≥ 660MPa; for 63 - 80mm, ≥ 640MPa.

Elongation: For nominal thicknesses ≤ 40mm, ≥ 14%; for 40 - 63mm, ≥ 14%; for 63 - 100mm, ≥ 14%.

Brinell hardness: For thicknesses ≤ 20mm, 235 - 293HBW.

 

 

 

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our Q690 High Strength Low Alloy Steel Plate, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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