Round Steel Bar

Classification by process Round steel is divided into three kinds of hot rolling, forging and cold drawing. The specification of hot rolled round steel is 5.5-250 mm. Among them: 5.5-25 mm of small round bar mostly to the supply of straight bundles, commonly used as steel bars, bolts and a...

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Classification by process

Round steel is divided into three kinds of hot rolling, forging and cold drawing. The specification of hot rolled round steel is 5.5-250 mm. Among them: 5.5-25 mm of small round bar mostly to the supply of straight bundles, commonly used as steel bars, bolts and a variety of mechanical parts, more than 25 mm round bar, mainly used for manufacturing machinery parts, seamless steel tube billet.

Classification by chemical composition

carbon steel according to chemical composition (that is, carbon content) can be divided into low-carbon, medium carbon and high carbon steels.

1.Low-carbon, also known as soft, carbon content from 0.1% to 0.3% low carbon steel easy to accept a variety of processing such as forging, welding and cutting, often used to make chains, rivets, bolts, shafts, etc.

2.Medium carbon,Carbon steel 0.25%~0.60%. There are calm steel, half calm steel, boiling steel and many other products. In addition to carbon can also contain a small amount of manganese (0.70%~1.20%). According to product quality is divided into ordinary carbon structural steel and high-quality carbon structural steel. Thermal processing and cutting performance is good, welding performance is poor. The strength and hardness are higher than that of low carbon steel, and the plasticity and toughness are lower than that of mild steels. The maximum hardness that can be achieved is about HRC55 (HB538) and σb for 600~1100mpa. So in the medium intensity of various uses, medium carbon steel is the most widely used, in addition to as building materials, but also a large number of mechanical parts for the manufacture.

3.High carbon steels, often called tool steel, carbon content from 0.6% to 1.7%, can harden and temper. Hammers, crowbar, etc. are made of steel with a carbon content of 0.75%, and cutting tools such as drills, taps, reamers, etc. are made of steel with a carbon content of 0.9% to 1%.

The material of round bar :

Q195、Q235、10#、20#、35#、45#、Q215、Q235、Q345、12Cr1Mov、15CrMo、304、316、20Cr、40Cr、20CrMo、35CrMo、42CrMo、40CrNiMo、GCr15、65Mn、50Mn、50Cr、3Cr2W8V、20CrMnTi、5CrMnMo

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