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Carbon round Bar
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
video
Advantage
Tensile Strength: ≥ 620 MPa
Yield Strength: ≥ 350 MPa
Elongation: ≥ 14%
Hardness: 170–210 HB
Straightness: ≤ 0.2mm/m
Roughness: ≤ Ra 3.2 (bright drawn)
Cold drawn carbon steel bars are ideal for applications that demand tight tolerances, smooth surfaces, and enhanced performance in load-bearing or rotational components:
Automotive shafts, gear pins, steering parts
Machinery axles, bushings, spindles
Precision tools and engineering parts
Construction fasteners and anchor rods
Furniture frames, railings, decorative structures
Guide rails, mold parts, bearing seats
