A572/S355JR Round Steel Bar
A572 steel bars have good strength, ductility and workability, making them ideal for structural applications. These characteristics make the A572 relatively simple to shape into different structures, while maintaining the ability to withstand large stresses and loads.
WhatsApp:+86 18906192815
Email:andrew@huiyingsteel.com
Contact Us
Products center

Product Description

A572/S355JR Round Steel Bar Description

A572 steel bar is made of a low-carbon, low-alloy high-strength steel employing the electric furnace steelmaking technology. So the main component is scrap iron. Resulting from its reasonable composition design and strict process control, A572 steel bar is widely favored for high purity and excellent performance. Its molten steel pouring manufacturing method not only gives the steel coil good density and uniformity, but also ensures that the steel bar has superior mechanical properties after cooling. A572 carbon steel bar is widely used in construction, bridges, heavy machinery and other fields. At the same time, it shows outstanding performance in welding, forming and corrosion resistance with its low carbon and low alloy characteristics.


Product Parameters

Product Name

A572/S355JR Round Steel Bar

Standard

EN/DIN/JIS/ASTM/BS/ASME/AISI, etc.

Common Round Bar Specifications

3.0-50.8 mmOver 50.8-300mm

Flat Steel Common Specifications

6.35x12.7mm, 6.35x25.4mm, 12.7x25.4mm

Hexagon Bar Common Specifications

AF5.8mm-17mm

Square Bar Common Specifications

AF2mm-14mm, AF6.35mm9.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm

Length

1-6meters, Size Accept Custom

Diameter(mm)

Hot Rolling Round Bar

25-600

Cold Rolling Square Bar

6-50.8

Hot Rolling Square Bar

21-54

Cold Rolling Hexagon Bar

9.5-65

Cold Rolling Round bar

6-101.6

Forged Rebar

200-1000

Surface Process

Bright, Polished, Black

Other Services

Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

 

Chemical Composition

A572

C

Mn

P

S

Si

Grade 42

0.21

1.35

0.03

0.03

0.15-0.4

Grade 50

0.23

1.35

0.03

0.03

0.15-0.4

Grade 60

0.26

1.35

0.03

0.03

0.40

Grade 65

0.23-0.26

1.35-1.65

0.03

0.03

0.40

 

Mechanical Properties

A572

Yield Strength (Ksi)

Tensile Strength (Ksi)

Elongation 8 inches

Grade 42

42

60

20

Grade 50

50

65

18

Grade 60

60

75

16

Grade 65

65

80

15

 

Physical Performance

Physical Performance

Metric

Imperial

Density

7.80 g/cc

0.282 lb/in³

 

Scope of Application

ASTM A572 carbon steel low-alloy steel is widely used as bridge panels, support plates, mechanical mounting plates, etc. for construction equipment, transmission towers, racks and other equipment.

 

Equivalent Material

EU

German Standard

Japanese Standard

French Standard

British Standard

Canada

Italy

Spain

National Standard

International

Portugal

India

EN

DIN,WNr

JIS

AFNOR

BS

HG

UNI

UNE

GB

ISO

NP

IS

S355JR

St52-3

SM490A

E36-2

50B

350W

Fe510B

AE355B

Q345B

E355C

FE510-B

IS961

Products center

Product Application

  • 1775551249900060937244790784
  • 1724983128687962864209162240
  • 1724983125687962850678337536
  • 1724983121687962836648390656
  • 1700360854_huge
  • a79728cbbd8040cb9dcee1b7a5e8e557
Products center

Packaging and shipping

  • 1
  • 2
  • 3
  • 4
  • 5
  • 9
Products center

Factory Display

  • a635e6aa8af749b3b20947091f812fdd
  • 011177a38e499b8b50e0993f29e85558
  • 60a465fb6d089d1e3a0c90958431d3c3
  • 未标题-2
  • 摄图网_600975422_钢铁仓库(非企业商用)-(1)
  • vecteezy_modern-industrial-steel-manufacturing-facility-with-advanced_49740735
  • 0b42940c953e9e845fc286c7d6151ed6
  • 25a2288e2c3f5a265b436ee9de2c6480
  • bf4177c383f74c00f80e0bca1aae52a7
  • 工厂车间 (4)
  • Stainless-Steel-Pipe-Manufacturers
  • 4ba06389467ca90624596b987abe434be8635cba188343-TdLEpR 拷贝
  • 645f88ceb28016b71deb44d0eca6ae91346ff4f633046-YV9trp
  • 76e854f676be41a74b86935d2042824d
Products center

FAQ

Q1: What types of steel products does your company primarily manufacture and supply?
A: We are a direct manufacturer specializing in carbon steel, hot-dip galvanized steel, PPGI (pre-painted galvanized iron), and stainless steel (grades 201, 304, and 316) in the form of sheets, coils, pipes, and various structural profiles, along with complementary steel structural components. Our products serve a wide range of industries, including infrastructure, photovoltaics, machinery manufacturing, chemicals, and new energy.

 

Q2: Do you support customization regarding material grades, thicknesses, and dimensions?
A: Customization is available across our entire product range. For carbon steel, galvanized steel, and stainless steel, we can adjust thickness, width, and cut-to-length dimensions according to GB, ASTM, or EN standards. Various profiles can be cut and bent based on customer drawings, and special steel grades can be produced through customized scheduling.

 

Q3: What is the difference between galvanized steel and color-coated (PPGI) steel, and how should I choose for my project?
A: Hot-dip galvanized steel features a pure zinc anti-rust layer; it is cost-effective and impact-resistant, making it ideal for mounting brackets, guardrails, and load-bearing factory structures (and it can be painted over). PPGI color-coated steel uses a galvanized base, offering both rust protection and aesthetic appeal with a wide range of colors; it is commonly used for factory roofing, wall cladding, and energy storage equipment casings. We recommend thicker galvanized coatings for projects in rainy coastal areas, color-coated sheets for outdoor projects requiring visual appeal, and weather-resistant fluorocarbon (PVDF) coatings for high-temperature desert environments.

 

Q4: Does the factory keep stock on hand, and what is the minimum order quantity (MOQ)?
A: We operate our own standardized, zoned warehouse with a capacity of over 10,000 tons, maintaining ample stock of carbon steel, galvanized steel, and stainless steel. The MOQ for standard specifications is 1 ton, though we also accept sample orders as small as a few dozen kilograms. There is no upper limit for large-scale projects, and we support mixed-load shipments combining different steel products in a single container.

 

Q5: What are the lead times for stock items versus customized products?
A: Standard stock items take 3–7 days for processing, packaging, and container loading. Simple cutting and bending orders take 7–10 days. Orders requiring mold creation or special steel customization take 15–30 days; exact delivery dates are confirmed based on the customer's specific order specifications.

Products center

Contact Us

Submit
Products center

recommendation