S275JR Round Bars – High Yield Strength Carbon Steel for Structural Applications
S275JR round bars are widely used carbon steel products known for their strength, durability, and excellent fabrication properties. Manufactured in accordance with EN 10025 S275JR, these bars are designed for structural and engineering applications where reliability and safety are essential.
We supply S275JR carbon steel round bars that are trusted by engineers, fabricators, and construction professionals. With hands-on experience in supplying structural steel to real-world projects, we understand what matters most—consistent quality, certified material, and dependable performance on site.
This page explains S275JR grade steel in simple terms, including specifications, chemical and mechanical properties, applications, and why it is one of the most popular high-yield strength round bars used today.
What Are S275JR Round Bars?
S275JR round bars are solid cylindrical bars made from non-alloy structural steel. The grade is defined by its minimum yield strength and impact resistance at room temperature.
Grade Breakdown:
- S – Structural steel
- 275 – Minimum yield strength of 275 MPa
- JR – Impact tested at +20°C
These bars are supplied as per EN 10025 S275JR, a European standard accepted worldwide for structural steel products.
Mild Steel Round Bar Black S235/S275M vs S275JR
Mild steel round bar black S235/S275M is often used for lighter structures, while S275JR carbon steel round bar is preferred when:
- Higher load capacity is required
- Better mechanical performance is needed
- Structural safety margins are important
S275JR remains the more popular choice for structural steel round bars in commercial projects.
Mild Steel Half Round Bar Black S235/S275
In addition to full round bars, we also supply mild steel half round bar black S235/S275, commonly used for:
- Edge protection
- Fabrication reinforcements
- Decorative metal structures
- Industrial design applications
These half-round bars combine structural strength with functional design.
S275JR Round Bars – Specification Chart
The EN 10025 standard governs hot-rolled structural steel. S275JR is one of the most commonly used grades within this standard due to its balanced mechanical strength and ease of fabrication.
| Parameter | Specification |
| Standard | EN 10025 |
| Grade | S275JR |
| Product Form | Round Bars |
| Delivery Condition | Hot Rolled / Black |
| Yield Strength | Min 275 MPa |
| Impact Test | +20°C (JR) |
| Weldability | Excellent |
| Machinability | Good |
| Surface Finish | Black / Hot Rolled |
This specification makes S275JR round bar suitable for both structural and general engineering use.
Chemical Properties of S275JR Carbon Steel Round Bar
The chemical composition of S275JR grade steel is carefully controlled to ensure good strength, weldability, and resistance to cracking during fabrication.
| Element | Maximum Percentage |
| Carbon (C) | 0.21% |
| Manganese (Mn) | 1.50% |
| Phosphorus (P) | 0.035% |
| Sulfur (S) | 0.035% |
| Nitrogen (N) | 0.012% |
| Copper (Cu) | 0.55% |
The low carbon content helps maintain excellent weldability, making S275JR carbon steel round bar ideal for fabrication and construction.
Mechanical Properties of S275JR High-Yield Strength Round Bars
One of the main reasons engineers prefer S275JR high-yield strength round bars is their dependable mechanical performance.
| Property | Value |
| Yield Strength | ≥ 275 MPa |
| Tensile Strength | 410 – 560 MPa |
| Elongation | ≥ 20% |
| Impact Strength | Tested at +20°C |
| Hardness (Typical) | 120 – 180 HB |
Applications of S275JR Round Bar
S275JR round bars are used across multiple industries due to their strength and versatility.
Common Uses:
- Structural frameworks
- Construction supports
- Base plates and anchor bolts
- Shafts, pins, and couplings
- General engineering components
- Fabricated machinery parts
- Infrastructure projects
Because of its reliable strength, S275JR high yield strength round bar is widely used where safety and load-bearing capability are important.
Why choose S275JR grade steel and S275JR round bars?
From practical experience in steel supply and fabrication support, S275JR grade steel is chosen because it offers:
- Higher yield strength than basic mild steel
- Easy welding without special pre-heating
- Good ductility reduces the risk of brittle failure
- Cost-effective structural performance
- Wide acceptance in global projects
This balance of properties makes S275JR round bars a dependable option for long-term use.
S275JR High-Yield-Strength Round Bar Suppliers in India
As experienced S275JR high-yield-strength round bar suppliers in India, we focus on delivering material that meets both technical standards and real-site expectations.
Each supply is backed by:
- EN 10204 3.1 Mill Test Certificate
- Chemical & mechanical test reports
- Dimensional inspection
- Traceable heat numbers
S275JR round bars offer an ideal balance of strength, weldability, and cost efficiency. With certified EN 10025 S275JR specifications, reliable mechanical properties, and a wide application range, they are a trusted choice for structural and engineering needs.
Whether you are looking for S275JR carbon steel round bar, mild steel round bar black S235/S275M, or mild steel half round bar black S235/S275, choosing quality-certified material ensures long-term performance and safety.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality S275JR Round Bars. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
