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Q355 Hot rolled steel round bar

Size:Ф20～350 Round steel and square steel are both types of carbon structural steel widely used in construction and machinery. Round steel is predominantly used for drawing wire, forging rivets, bolts, nuts, and other metal products. On the other hand, square steel is commonly employed in machinery applications.

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Carbon Steel Round Bar

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Keywords: Zerchen Energy

Round steel and square steel are both types of carbon structural steel widely used in construction and machinery. Round steel is predominantly used for drawing wire, forging rivets, bolts, nuts, and other metal products. On the other hand, square steel is commonly employed in machinery applications.

These two types of steel are known for their straightforward section designs, with round steel having a circular cross-section and square steel featuring a square cross-section. Low carbon round and square steel are especially important as primary materials for manufacturing a wide range of metal products, thanks to their versatility and durability.

Meanwhile, medium carbon round steel and square steel are commonly utilized in the manufacturing of mechanical structural components because of their high strength and long-lasting durability. In general, round steel and square steel are essential materials in various industrial sectors, serving as the basic foundation for construction and machinery industries. These two types of steel are widely recognized for their reliability and versatility in a multitude of applications, making them indispensable in modern manufacturing processes. With their superior mechanical properties and resistance to wear and tear, round steel and square steel continue to be the materials of choice for engineers and manufacturers looking to create high-quality and long-lasting products. From large-scale construction projects to intricate machinery designs, these types of steel are instrumental in ensuring the structural integrity and performance of a wide range of products. In conclusion, the importance of round steel and square steel in the industrial sector cannot be overstated, as they are integral components that contribute to the overall success and advancement of various industries worldwide.

Category	Grade	Size	Implementation Standards	Application	Remark
High quality carbon structural steel	20~45, 50Mn, S15~55C, S20C,S35C,S45C,C45,C50，SAE1045 1015, A105，Cf53,UC1; S235JR、S235J0、S235J2 S355JR、S355J0、S355J2	φ16~φ350	GB/T 699， JIS G4051， EN10083-2， ASTM A29， Technical aggrement for supply Technical protocol	Used for making all kinds of shafts, connecting rods, crankshafts, crank pins, gears, rotary supports, valve bodies and fasteners of automobiles, engineering machinery and other machinery. For Manufacturing of All Kinds of Bearing Parts, Screw, Connecting Rod, Rigging, Metal Tools, etc.
Q355 series LF2, LF6, S355J2 series S355NL series	Q355 LF2 S355J2	Ф20～350	GB/T 1591 EN 10025 EN 10021 Technical protocol	Used for making structural parts such as equipment connectors, shafts, valve bodies,etc. Of machinery, petroleum, water conservancy, shipbuilding, construction and other fields.
Structural alloy Steel/Alloy structure steel	20-45Mn2， 20-45Cr 15-42CrMo，40CrMnMo，38CrMoAI， 20-40CrNiMo，42-50CrMo4，B7， SCM415-440， SNCM431， AISI4130， AISI4140， AISI4137H ，AISI4145H， AISI4340， AISI8630	Ф16～Ф350	GB/T 3077 JIS G4053 EN 10083-3 ASTM A29 Q320582 JYG22 Technical protocol	Used for making structural parts such as shafts, connecting rods, gear wheels, etc. of wind driven generater, mining machinery, engineering machinery, petroleum machinery, machine tools, automobiles and lifting equipment.
Tube billet steel	20G， 15CrMoG， 12Cr2MoG， 12CrlMoVG，10Cr9MolVNbN， SA-210C， Tla， Til， T12， T22， T5， WB36， T91， 25CrMo， 30CrMo， 4130， 34CrMo4， 15NilMnMoNbCu， 10Cr9MolVNbN， CB770， CB890， 27CrMo-F， ZD135， 33Mn2V， 36Mn2V， 22Cr3MoTi， 29CrMoVNb	Ф20～Ф300	YB/T 5137 GB 30584 API 5CT ASME SA-213/SA-213M ASTM A335/A335M Technical protocol	Used for making steel pipes in oil exploitation, natural gas transmission, crane boom, thermal power generation, high-pressure gas cylinders, mechanical structures and other fields.	Carbon steel round pipe billet； Alloy structure round pipe billet； High pressure smls pipe billet
Grinding ball steel	B2 B3 B250A B300A B350A B400A S550A S550C S650A S-704 S-901	Ф20～120	Technical protocol	Used for making grinding balls in metallurgy, mining, cement and other fields.
Gear steel/Gearing steel	20CrMnTiH， 22CrMoH(SCM822H)， 20CrMnMoH， 20CrNiMoH， 16-28MnCr5H， 18CrNiMo7-6H， SCM420H， SAE8620H， TL4227H； 45H，15CrH～45CrH，42CrMoH，16CrMnH，15CrMnBH，40MnBH，20MnVBH，20MnTiBH，SCr420H	Ф20～350	GB/T 5216 EN 10084 ASTM A304 Technical agreement for supply Technical protocol	Used for making gear wheels of automobiles, wind power, engineering machinery and other fields.

Warehouse Storage

The company has a warehouse over 3000 square meter and always keep at least 8000 Tons of different grades of steel materials as stock, including coil, plates and pipes.We professionally provide our customers with all kinds of stainless steel plates, coils, pipes, as well as various of carbon steel, galvanized and aluminum coils, sheets, and pipes

Packing and shipping

We have stable and reliable business channels with many famous manufacturers of steel product, such as Baosteel, Baoxin, TISCO, ZPSS/QPSS, JISCO, Shougang Group,Tsing Tuo Group,Angang Steel,SKS,etc,thus, we can meet the different requirements from our customers, especially for some urgent orders and small orders.

Application field

The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision Processing, auto parts, machinery, electronic products, molds, medical equipment, construction, decoration, etc.