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About Service

Zhongrun Steel (Foshan) Co., Ltd. is located in the beautiful Foshan City, Guangdong Province. It has 25 years of production and sales experience, exported to more than 30 countries, and has more than 500 cooperative customers. At present, it is an excellent enterprise in the Foshan market in terms

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2023-08-21

About Company

AISI Cold Drawn Structure Mild Carbon Forged Bright Cylinder Steel Round Bar

Cold Drawn Carbon Steel Bar – Precision Round Bar with Superior Surface & Dimensional Tolerance

High-precision cold drawn carbon steel bars with enhanced dimensional accuracy, smooth surface finish, and increased mechanical strength. Ideal for shafts, fasteners, machine parts, and automotive components.

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Model:
Carbon round Bar
Brand:
ZHONG RUN

Product Description

Cold drawn carbon steel bars are manufactured by pulling hot-rolled bars through a die to achieve improved dimensional tolerance, higher tensile strength, and a bright, smooth surface finish. This cold working process enhances the mechanical properties of the bar while ensuring excellent machinability and tight tolerances, often eliminating the need for further machining.

Available in round, hexagonal, square, and flat bar profiles, cold drawn bars are widely used in precision engineering, tooling, manufacturing, and automotive industries.

Steel Grade	Q195/Q235/Q345/45#/ S20C
Standard	ASTM A615Gr40/60,BSS4449 Gr460B,500B etc
Diameter	6mm-1200mm
Length	3000mm-12000mm or as client's request
Straightness	3mm/M max
Tolerance	+0.5mm/-0(dia),+5mm/-0(L)
MOQ	1 tons
Heat treatment	Normalized / Annealed / Quenched / tempered
Surface	black,mill,polished,brush,etc
Test	Ultrasonic test according to SEP 1921-84 G3 C/c
Trade Term	FOB,CFR,CIF
Payment	30% advance by TXT; Balance pay before the shipment against shipping documents or irrevocable LC at sight
Packaging	Export standard, seaworthy
Delivery time	10-20days after confirmed order
Loading port	Tianjin port
Container size	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
	40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
	40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)
Item Type	Diameter (MM)	Length
Round Bar	8-400	6/9/12m or follow client's requirment.
Steel Wire Rod	5.5-34	Coil
Steel Rebar	5.5-40	Cut to length or Coil

Category	Grades	Sizes	Standard
Carbon structure steel	Q195,Q215,Q235,Q275	16mm-250mm	GB/T700-2006
Low alloy high strength structure steel	Q295,Q345,Q390,Q420, Q460	16mm-250mm	GB/T1591-2008
Prime Carbon structure steel	10#, 20#, 35#, 45#, 60#, 20Mn,65Mn,B2, B3,JM20, SH45,S45C,C45	16mm-250mm	GB/T699-1999
Alloy structure steel	30Mn2,40Mn2,27SiMn, 42Crmo, 20Cc40Cr,20CrMo, 35CrMo,20CrMnTi, 30CrMnTi,20MnVB, 20MnTiBf 45MnV 20CrNiMo, Q345B, 35MnBM,40MnB,36Mn2V	16mm-250mm	GB/T3077-1999
Spring Steel	65Mn,60Si2Mn, 50CrVA	16mm-250mm	GB/T1222-84
Bearing Steel	GCr15tGCr15GD,55SiMoV	16mm-250mm	GB/T18254-2002
Structural steels subject to end-quench hardenability requirements	20CrMnTi,30CrMnTi, 20Cr, 40Crf30CrMo,42CrMoA,27SiMn, 40Mn2H, 20CrNiMo, 40Mn2,q345b,35MnBM, 40MnB,45MnV.	16mm-250mm	GB/T5216-2004
Oil wells structural steel	37Mn5,36Mn2V	16mm-250mm	Q/LYS248-2007
Marine anchor chain steel	CM490,CM690,M30Mn2	16mm-250mm	YB/T66-1987 GB/T18669-2002

Chemical Composition ASTM A105 / 105N Carbon Steel Round Bars
Carbon Steel Grades	C	Mn	Si	S Max.	P Max.
Ck 45	0.42/0.50	0.50/0.80	0.15/0.35	0.04	0.04
Ck 55	0.52/0.60	0.60/0.90	0.15/0.35	0.04	0.04
Ck 60	0.57/0.65	0.60/0.90	0.15/0.35	0.04	0.04
SAE1006	0.08 max	0.25/0.40	0.10/0.30	0.05	0.04
SAE1008	0.10 max	0.30/0.50	0.10/0.30	0.05	0.04
SAE1010	0.08/0.13	0.30/0.60	0.10/0.30	0.05	0.04
SAE1018	0.15/0.20	0.60/0.90	0.10/0.30	0.05	0.04
SAE1020	0.18/0.23	0.30/0.60	0.10/0.30	0.09	0.04
SAE1030	0.28/0.34	0.60/0.90	0.10/0.40	0.05	0.04
SAE1035	0.32/0.38	0.60/0.90	0.10/0.40	0.05	0.04
SAE1040	0.37/0.44	0.60/0.90	0.10/0.40	0.05	0.04
SAE1045	0.40/0.50	0.60/0.90	0.10/0.40	0.05	0.04
En-8D	0.40/0.45	0.70/0.90	0.05/0.35	0.06	0.06
En-9	0.50/0.60	0.50/0.80	0.05/0.35	0.06	0.06

ASTM A105 / A105N Carbon Steel round bars Mechanical Properties:
Property	Ultimate Tensile Strenght	0.2% Yield Strenght	Elongation	Reduction of Area	Charpy Impact Toughness	Hardness
Value	70 Min	36 Min	30% Min	22% Min	30	187 HBW MAX
	Ksi(485 Mpa)	Ksi (250 Mpa)

Product Show

Carton steel bar

Carbon round rod

hexagonal rod

Carbon steel square rod

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Advantage

COMPLETE IN SPECIFICATIONS

Various optional models are complete

EXQUISITE CRAFT

After strict surface treatment,

color.Heavy and durable

GOOD MECHANICAL PROPERTIES

The product has good mechanical

performance andis resistant

to processing.

Mechanical Properties (Typical for AISI 1045, Cold Drawn):

Tensile Strength: ≥ 620 MPa
Yield Strength: ≥ 350 MPa
Elongation: ≥ 14%
Hardness: 170–210 HB
Straightness: ≤ 0.2mm/m
Roughness: ≤ Ra 3.2 (bright drawn)

Applications

Cold drawn carbon steel bars are ideal for applications that demand tight tolerances, smooth surfaces, and enhanced performance in load-bearing or rotational components: