Carbon Steel Bar - Ganghua (Shandong) Iron Steel CO.,Ltd(碳钢)

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Carbon Steel Bar

Carbon steel bar is a kind of solid long steel, and the common ones are round steel, square steel, hexagonal steel, octagonal steel, etc. Round steel is often used to make steel bars, bolts and various mechanical parts, as well as billets for seamless steel pipes. Square steel refers to steel that is rolled or processed into a square section, which can be divided into hot-rolled and cold-rolled. Ganghua Steel can produce steel bars of various materials and shapes, with rich production experience and support for product customization.

Carbon Steel Round Bar
Carbon Steel Square Bar

Carbon Steel Grades And Chemical Composition

Grade	Level	Chemical Composition %					Deoxygenation Method	Use
		C	Mn	Si	S	P
				No greater than
Q195	-	0.06~0.12	0.25~0.50	0.30	0.050	0.045	F、b、Z	General bridges, building structures, general mechanical parts, such as screws, nuts, etc.
Q215	A	0.09~0.15	0.25~0.55	0.30	0.050	0.045	F、b、Z
	B				0.045
Q235	A	0.14~0. 22	0.30~0.65	0.30	0.050	0.045	F、b、Z
	B	0.12~0.20	0.30~0.70		0.045
	C	≤ 0.18	0.35~0.80		0.040	0.040	Z
	D	≤ 0.17			0.035	0.035	TZ
Q255	A	0.18~0.28	0.40~0.70	0.30	0.050	0.045	F、b、Z	It can be used for mechanical parts with large force, such as sprockets, tie rods, etc.
	B				0.045
Q275	-	0.28~0.38	0.50~0.80	0.35	0.050	0.045	b、Z

Deoxidation method: boiling steel F, semi-killed steel b, killed steel Z, special killed steel TZ

What is carbon steel round bar?

Carbon steel round bar is a solid long steel bar with a circular cross-section. Its specifications are expressed in diameter in millimeters (mm). Round bars are divided into three types: hot rolled round bars, forged round bars and cold drawn round bars according to the process section. According to the chemical composition (ie carbon content), it can be divided into low carbon steel round steel, medium carbon steel round steel and high carbon steel round steel. According to the quality of steel, it can be divided into ordinary carbon steel round steel and high-quality carbon steel round steel. According to the use, it can be divided into carbon structural steel and carbon tool steel.

carbon steel round bar
carbon steel bar

The difference between round steel and other rebars

The appearance is different, the round steel has a smooth appearance, no texture and no ribs, and other rebars have engraved or ribbed surface appearance, which causes the bonding force between the round steel and the concrete to be small, while the other rebars and the concrete have less adhesion. Great adhesion.

The composition is different. Round steel (grade 1 steel) belongs to ordinary low carbon steel, and other rebars are mostly alloy steel.

The strength is different, the strength of the round steel is low, and the strength of other rebars is high, that is, the round steel with the same diameter can withstand less tensile force than other rebars, but the plasticity of the round steel is higher than that of other rebars. Strong, that is, the round steel has a large deformation before being broken, while the deformation of other rebars is much smaller before being broken.

Common steel grades and chemical compositions of high-quality carbon steel round steel

Steel Number	Chemical Composition, %					σs, MPa ≥
Steel Number	C	Mn	Si	S	P	σs, MPa ≥
08F	0.05-0.11	0.25-0.50	≤0.03	<0.035	<0.035	175
10	0.07-0.13	0.35-0.65	0.17-0.37	<0.035	<0.035	205
20	0.17-0.23	0.35-0.65	0.17-0.37	<0.035	<0.035	245
35	0.32-0.39	0.50-0.80	0.17-0.37	<0.035	<0.035	315
40	0.37-0.44	0.50-0.80	0.17-0.37	<0.035	<0.035	335
45	0.42-0.50	0.50-0.80	0.17-0.37	<0.035	<0.035	355
50	0.47-0.55	0.50-0.80	0.17-0.37	<0.035	<0.035	375
60	0.57-0.65	0.50-0.80	0.17-0.37	<0.035	<0.035	400
65	0.62-0.70	0.50-0.80	0.17-0.37	<0.035	<0.035	420

08-25 steel has low carbon content, low strength and hardness, good plasticity, toughness and weldability. It is mainly used to manufacture stamping parts, welded structural parts and mechanical parts with low strength requirements.

30-55 belongs to quenched and tempered steel, which has good comprehensive mechanical properties after being quenched and tempered, and is mainly used to manufacture mechanical parts with greater stress.

The steel above 60 belongs to spring steel, which can obtain a higher elastic limit after heat treatment, and is mainly used for the manufacture of elastic parts.

What is carbon steel square steel?

Carbon steel square steel is a solid long strip of steel with a square cross-section. Square steel is made from steel ingots, billets or steel through pressure processing. Square steel can be divided into two types: hot-rolled and cold-rolled; hot-rolled square steel refers to steel that is rolled or processed into a square section. Square steel is generally used in light steel structures, such as steel roof trusses, civil housing skeletons, etc.

Carbon steel square bar
Carbon Steel Bar

Epilogue

Ganghua Steel focuses on the production of steel products, providing you with high-quality carbon steel bars, such as round steel, square steel, hexagonal steel, etc., providing samples and quality assurance. Looking forward to working with you to become a forever partner! We have experienced technicians and a complete production line, which can provide services such as cutting and product customization. Welcome to communicate with us!

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