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A36 Round Steel Bar

A36 Round Steel Bar

A36 is a low-carbon steel containing manganese, phosphorus, sulfur, silicon and copper. A36 has good weldability and high yield strength. A36 carbon steel bar is commonly used as a variety of structural steel parts.
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Product Parameters

Carbon Steel: Properties, Production, Examples and Applications


Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.


Types of carbon steel and their properties


Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel . Their carbon content, microstructure and properties compare as follows:



Carbon content (wt.%)MicrostructurePropertiesExamples
Low-carbon steel< 0.25Ferrite, pearliteLow hardness and cost. High ductility, toughness, machinability and weldability
Medium-carbon steel0.25 – 0.60MartensiteLow hardenability, medium strength, ductility and toughness
High-carbon steel0.60 – 1.25PearliteHigh hardness, strength, low ductility



Carbon Steel Description



Grade:


1)GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E


2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q 


3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80 


4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE



PRODUCT DETAILS



A36  Round Steel Bar Description
A36 is  a carbon structural steel whose chemical composition and mechanical  properties strictly conform to American ASTM standards. A36 steel bar mainly consists of iron, carbon,  silicon, manganese, phosphorus, sulfur and other elements. Iron constitutes more than 99% of the entire chemical composition. Its carbon content proportion is relatively  high, around 0.2%,  ensuring that the steel has a certain hardness and toughness. The addition of  silicon, manganese and other elements enhances the strength and toughness of  steel. Phosphorus  and sulfur are low so that the steel bar has  good welding performance and corrosion resistance. A36 steel bar is used for  welded, bolted or riveted construction of bridges and buildings, as well as  for general structural purposes. Due to its lowest yield point, A36 can be  used to design lighter-weight structures and equipment, and provide good  weldability.


Product   Parameters
Product NameA36 Round Steel Bar
StandardEN/DIN/JIS/ASTM/BS/ASME/AISI, etc.
Common   Round Bar Specifications3.0-50.8 mm, Over 50.8-300mm
Flat   Steel Common Specifications6.35x12.7mm, 6.35x25.4mm, 12.7x25.4mm
Hexagon   Bar Common SpecificationsAF5.8mm-17mm
Square   Bar Common SpecificationsAF2mm-14mm, AF6.35mm, 9.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm
Length1-6meters, Size Accept Custom
Diameter(mm)Hot Rolling   Round Bar25-600Cold   Rolling Square Bar6-50.8
Hot Rolling Square Bar21-54Cold   Rolling Hexagon Bar9.5-65
Cold Rolling Round bar6-101.6Forged Rebar200-1000
Surface ProcessBright, Polished, Black
Other   ServicesMachining(cnc), Centerless Grinding(cg), Heat   Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting,   Bending, Small Machining, etc.


Chemical Composition
CCuFeMnPSiS
0.25~0.2900.2981.030.040.280.05
Physical  Performance
Physical PerformanceMetricImperial
Density7.85 g/cm30.284 lb/in3
Scope of  Application
Bolted,  riveted or welded structures for bridges, buildings and oil drilling rigs.
Used  for forming storage tanks, silos, bearing plates, fixtures, rings, templates,  fixtures, sprockets, cams, gears, bottom plates, forgings, decoration  engineering, piles, brackets, automobiles and agricultural equipment, frames,  mechanical parts, etc.
Equivalent Material
National  Standard GBEuropean  Standard ENAmerican  Standard ASTMGerman Standard DIN,WNrJapanese  Standard JISFrench Standard AFNORBritish  Standard BSCanada HG
Q235BS235JRA283CSt37-2SM400AE24-240A/40B230G
Italy UNIIndia ISSwitzerland SSAustralia ONORMNorway NSSpain UNEInternational Standards ISOPortugal NP
Fe360BIS20621311/1312RSt360BNS12123AE235B-FNE235B/Fe360BFE360-B


Product Display


A36 Round Steel Bar

Product Application


A36 Round Steel Bar

Product Packaging

A36 Round Steel Bar


Factory Display

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FAQ

A:

All our steel products are manufactured using genuine materials that meet national standards; we strictly adhere to national production regulations and strictly prohibit the use of non-standard specifications, adulterated materials, or defective goods. For every shipment, we provide a complete set of documentation—including material specifications, quality inspection reports, and factory certificates—free of charge. Our products support third-party re-inspection, on-site acceptance, and project filing, ensuring full traceability of quality throughout the process.

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We support custom processing for a full range of steel products. For items such as steel plates, profiles, pipes, and round bars, we provide tailored services—including cutting, bending, drilling, trimming, beveling, anti-corrosion painting, and hot-dip galvanizing—based on client construction drawings and on-site requirements. We can process materials to any dimension or non-standard specification, meeting the unique needs of various engineering projects and equipment manufacturing applications.

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We offer free sample delivery. To ensure peace of mind during the procurement process, we provide steel samples matching your specifications, allowing you to verify material quality, check manufacturing processes, and facilitate acceptance inspections by the project owner. Testing samples prior to placing bulk orders helps minimize procurement risks.

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Steel is a commodity with prices that fluctuate in real-time based on futures markets, raw material costs, and inventory levels; since fixed list prices can lead to discrepancies, we provide standardized, real-time manual quotes. All pricing is transparent with no hidden costs; quotes can be provided on either a tax-inclusive or tax-exclusive basis, and special VAT invoices can be issued upon request.

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Our company has no strict minimum order quantity requirements and supports various procurement models, including small-scale purchases, bulk stocking, and full-order supply for engineering projects. We can handle orders ranging from small top-up supplies for construction sites and ad-hoc store purchases to bulk procurement for large-scale projects, flexibly meeting the diverse needs of our customers.

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We support monthly settlement and deferred payment terms for high-quality project clients and long-term partner distributors. Long-term partners enjoy exclusive pricing, as well as priority in order scheduling and shipment; please contact your account manager to discuss specific partnership policies.

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