Carbon steel bar
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  • Carbon Thread Steel
  • Carbon Thread Steel
  • Carbon Thread Steel

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Carbon Thread Steel
Screw thread steel is a steel bar with ribs on the surface, also known as ribbed steel bar, usually with two longitudinal ribs and evenly distributed transverse ribs along the length direction.
yarik@qdyssteel.com
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PARAMETER

Product Namecarbon steel round bar
Outer Diameter6mm-1020mm, or as per requirements
Length500mm-6000mmor as customer request
StandardASME, ASTM, EN, BS, GB, DIN, JIS, etc
Low alloy high strength structure steelQ295, Q345, Q390, Q420, Q460
Prime Carbon structure steel10#, 20#, 35#, 45#, 60#, 20Mn, 65Mn, B2, B3, JM20, SH45,S45C, C45 1015 1020 1025 1030 1035 1045 1050
Alloy structure steel30Mn2, 40Mn2, 27SiMn, 42Crmo,20Cr, 40Cr, 20CrMo, 35CrMo, 20CrMnTi, 30CrMnTi,20MnVB, 20MnTiB, 20CrNiMo, Q345B, 35MnBM,40MnB,36Mn2V,45MnV,
Spring Steel65Mn, 60Si2Mn, 50CrVA
Bearing SteelGCr15, GCr15GD,55SiMoV

CHEMICAL COMPOSITION

GradeCSiMnPSCu
S20C0.18-0.230.15-0.350.30-0.600.0350.035-
S25C0.22-0.280.15-0.350.30-0.60≤0.030≤0.035≤0.20
S30C0.27～0.340.17～0.370.50～0.80≤0.035≤0.035≤0.25
S40C0.37～0.430.15～0.350.60～0.90≤0.030≤0.030≤0.25
S45C0.42-0.480.15-0.350.60-0.90≤0.030≤0.0350.25-0.55
S50C0.47～0.550.17～0.370.50～0.80≤0.035≤0.035≤0.25
S55C0.52~0.580.15~0.350.60~0.90≤0.030≤0.035≤0.30
S60C0.57～0.650.17～0.370.50～0.80≤0.035≤0.035≤0.25

MECHANICAL PROPERTIES

Carbon content (wt.%)MicrostructurePropertiesExamples
Low-carbon steel< 0.25Ferrite, pearliteLow hardness and cost. High ductility, toughness, machinability and weldabilityAISI 304, ASTM A815, AISI 316L
Medium-carbon steel0.25 – 0.60MartensiteLow hardenability, medium strength, ductility and toughnessAISI 409, ASTM A29, SCM435
High-carbon steel0.60 – 1.25PearliteHigh hardness, strength, low ductilityAISI 440C, EN 10088-3

PACKAGING & DELIVERY

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COMPANY STRENGTH

The company's products are widely used in fields such as petrochemical, ocean engineering, shipbuilding, boiler heat exchangers, environmental protection equipment, mechanical processing, automobiles, pharmaceuticals and food, hydropower, fertilizers, refrigeration, new energy equipment, etc.

Since its establishment, we have always adhered to the business philosophy of "quality, customer first, honest management, and win-win cooperation", with the corporate spirit of "seeking truth, pragmatism, reform and innovation", and the service philosophy of "honesty first, professional service". We warmly welcome new and old customers from all over the country to call and negotiate business!

FAQ

Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.

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