A572/S355JR Carbon Steel Bar

Name: A572/S355JR Carbon Steel Bar - Erikco World
Brand: Carbon Steel Bar

The A572/S355JR Carbon Steel Bar is a high-strength, low-alloy steel bar with excellent weldability, toughness, and corrosion resistance, making it ideal for construction, engineering, and industrial applications.

Category Carbon Steel Bar

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A572/S355JR Carbon Steel Bar
The A572/S355JR Carbon Steel Bar is a high-strength, low-alloy structural steel bar designed for applications requiring superior strength, toughness, and weldability. It meets ASTM A572 and EN 10025 S355JR standards, making it ideal for use in construction, engineering, and industrial manufacturing. The A572 grade features excellent yield strength, impact resistance, and corrosion resistance, while S355JR is known for its outstanding mechanical properties and good machinability. This steel bar is widely used in structural applications such as bridges, buildings, offshore platforms, and heavy equipment manufacturing. It is available in various sizes, shapes, and finishes to meet specific project requirements.

Product Parameter
Product Name	A572/S355JR Carbon Steel Bar
Type	Carbon Steel Bar
Material Grade	ASTM A572 / EN 10025 S355JR
Standard	ASTM A572, EN 10025-2
Yield Strength	A572: 290-345 MPa (Grade 50) / S355JR: 355 MPa
Tensile Strength	A572: 450-620 MPa / S355JR: 470-630 MPa
Elongation	18-21% (Varies by thickness and grade)
Impact Strength	27J at -20°C (S355JR Charpy V-Notch)
Density	7.85 g/cm³
Hardness	140-180 HB (Brinell Hardness)
Weldability	Excellent (Preheating may be required for thick sections)
Machinability	Good
Corrosion Resistance	Moderate (May require additional coatings for enhanced durability)
Length	3m, 6m, 9m, 12m, or Custom Length
Surface Finish	Black, Polished, Bright, Galvanized
Applications	Structural engineering bridge construction heavy machinery offshore platforms automotive frames

Chemical Composition
	Carbon (C)	Manganese (Mn)	Phosphorus (P)	Sulfur (S)	Silicon (Si)	Copper (Cu)	Nickel (Ni)	Chromium (Cr)	Molybdenum (Mo)
ASTM A572 (Grade 50)	≤ 0.23%	≤ 1.35%	≤ 0.030%	≤ 0.030%	0.15 – 0.40%	≥ 0.20% (min)	≤ 0.40%	≤ 0.40%	≤ 0.10%
EN 10025 S355JR	≤ 0.24%	≤ 1.60%	≤ 0.045%	≤ 0.045%	≤ 0.55%	≤ 0.55%	≤ 0.30%	≤ 0.30%	≤ 0.08%

Mechanical Properties
	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Impact Toughness (Charpy V-Notch)
ASTM A572 (Grade 50)	290-345 MPa	450-620 MPa	18-21% (depends on thickness)	≥ 27J at -20°C
EN 10025 S355JR	355 MPa	470-630 MPa	17-20%	≥ 27J at 0°C

Physical Performance
Density	7.85 g/cm³
Hardness (Brinell)	140-180 HB
Elastic Modulus	200 GPa
Thermal Conductivity	45-50 W/m·K
Electrical Resistivity	0.15 µΩ·m
Melting Point	1420-1460°C

Scope of Application
✅ Structural Engineering – Bridges, high-rise buildings, industrial structures, and steel frameworks. ✅ Heavy Equipment Manufacturing – Cranes, bulldozers, and lifting machinery. ✅ Offshore & Marine Structures – Oil platforms, shipbuilding, and dockyards. ✅ Automotive Industry – Chassis, frames, and support structures. ✅ Rail & Transport Infrastructure – Railway tracks, train components, and support beams. ✅ Energy Sector – Wind turbine towers, power plant structures, and transmission towers. ✅ Construction & Fabrication – Prefabricated buildings, pressure vessels, and metal fabrication.

Equivalent Material
ASTM	EN	DIN	JIS	GB (China)	ISO
A572 Grade 50	S355JR	St52-3	SM490A	Q345B	E355

Packing and delivery
These Product are packed using seaworthy export packaging to ensure protection during transit. Each coil is wrapped with waterproof paper, plastic film, and steel sheet, secured with high-tensile steel straps, and placed on wooden pallets for stability. Edge protectors are used to prevent damage. These Product are safely loaded for efficient domestic and international delivery, ensuring they arrive in perfect condition.

FAQs

How long does your delivery time take?

Generally, our delivery time is within 7-45 days, if there is a great demand or special circumstances, it may be delayed.

How could you guarantee your products?

Each piece of products is manufactured by certified workshops, inspected by Linxu piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.

Do you accept the third party inspection?

Yes absolutely we accept.

Do you provide samples ? Is it free or extra ?

The sample could can provide for customer with free, but the courier freight will be covered by customer account.

Will you delivery the goods on time?

Yes, we promise to provide best quality products and delivery on time. Honesty is our company’s tenet.

Are you trading company or manufacturer ?

We are professional manufacturer with rich experience, and our company also is a very professional a trade company for steel products. We can also provide a wide range of steel products.