Hot Rolled Carbon Steel Plate/Sheet (ASTM A36, Q235, SS400)

Hot rolled carbon steel plates/sheets are among the most widely used structural materials globally, valued for their affordability, versatility, and ease of fabrication. Three of the most common grades-ASTM A36, Q235 (Chinese standard), and SS400 (JIS standard)-are often compared due to their overlapping applications in construction, machinery, and general engineering. Below is a detailed comparison and overview:

1. Key Standards & Definitions

Grade	Standard	Core Definition
ASTM A36	ASTM A36 (U.S.)	Non-alloy structural steel with a minimum yield strength of 250 MPa.
Q235	GB/T 700 (China)	"Q" = yield strength; "235" = minimum yield strength of 235 MPa (grade B is common).
SS400	JIS G 3101 (Japan)	"SS" = structural steel; "400" = minimum tensile strength of 400 MPa.

 

 

 

 

 

2. Chemical Composition

All three grades are low-carbon steels, ensuring good weldability and ductility:

 

Element	ASTM A36	Q235B (GB/T 700)	SS400 (JIS G 3101)
Carbon (C)	0.25% max	0.12–0.20%	0.20% max
Manganese (Mn)	0.80–1.20%	0.30–0.70%	1.40% max
Silicon (Si)	0.40% max	≤ 0.35%	0.30% max
Phosphorus (P)	≤ 0.04%	≤ 0.045%	≤ 0.04%
Sulfur (S)	≤ 0.05%	≤ 0.045%	≤ 0.04%

 

 

 

 

 

 

 

 

 

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 Hot Rolled Carbon Steel Plate/Sheet ASTM A36 Q235 SS400, and develop new technical specifications and processes.
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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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