GB/T 699 35# round bar

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11-May-2024

GB/T 699 35# carbon steel is a medium carbon steel at chinese standard. Compared with 30# carbon steel, 35# has higher carbon element, so the strength is better. We henan KUNFENG can offer forged round bars OD 80 mm - 1200 mm.

Because of its properties, GB/T 699 35# round bar is widely used for manufacturing various machinery parts heat pressing components which bear heavy load with small section,such as axle pin,shaft, crank axle,crossbeam, connecting rod,lever,etc. GB/T 699 35# round bar can not be applied to produce welded structural parts.

GB/T 699 35# round bar, is usually used after normalizing treatment, or quenching and tempering treatment, to get good properties and machinability. GB/T 699 35# round bar is in a large need,so we henan KUNFENG stock large quantity of forged bars in the warehouse, and various size round bars included. If you have any need on GB/T 699 35# round bar, please do not hesitate to contact us.

s are usually produced under the followed procedures: EAF arc furnace + LF purify affinage + VDF + ingot steel(bottom gating /argon) + forged + annealing + black polishing (turnery) + GB/T6402-92 ΙΙ UT test + smooth edges with sawing .

s chemical composition by %,maximum

Grade	C	Si	Mn	P	S	Ni	Cr	Cu
GB/T 699 35#	0.32-0.39	0.17-0.37	0.5-0.8	≤0.035	≤0.035	≤0.3	≤0.25	≤0.25

s mechanical properties

Grade	Delivery State	T.S. N/mm2 Min	Y.S. N/mm2 Min	A,% Min	Z,% Min	Hardness, (annealing or tempering) HB,max	Forging ratio	Grain Size (level)	Nonmetal ratio
GB/T 699 35#	Hot rolled, forged, or heat treatment	530	315	20	45	197	≥ 4:1	≥ 6	≤ 2.0