Product Overview
ASTM A572 Grade 50 is a High-Strength Low-Alloy (HSLA) structural steel section, engineered for projects that demand a superior strength-to-weight ratio.
ASTM A572 Grade 50
By incorporating micro-alloying elements like Niobium (Columbium) and Vanadium, our A572 Gr.50 H-beams provide higher yield strength than conventional carbon steel (A36), allowing for lighter, more efficient, and cost-effective structural designs.
As a leading manufacturer, we strictly adhere to ASTM A6/A6M dimensional tolerances, ensuring precision for bridges, high-rise buildings, and heavy equipment frames.
Key Technical Specifications of ASTM A572 Grade 50
| Property | Imperial (Standard) | Metric (Equivalent) |
| Yield Strength | 50 ksi min. | 345 MPa |
| Tensile Strength | 65 ksi min. | 450 MPa |
| Minimum Elongation | 18% (in 8") / 21% (in 2") | 18% - 21% |
| Material Category | HSLA (High-Strength Low-Alloy) | Micro-alloyed (Nb + V) |
| Equivalent Grades | EN S355JR, GB Q355D, JIS SS490, ISO S355 |
Comprehensive Size Range & Customization
We supply a full range of H-sections and Wide Flange (W-series) beams. All products can be customized in length and surface treatment.
Height (Depth): 100 mm – 900 mm (W4" to W36" series)
Flange Width: 50 mm – 400 mm
Web Thickness: 5 mm – 30 mm
Length: 6m, 9m, 11.8m, 12m, or Customized up to 14 meters.
Surface Treatment:
Black (Self-colored/Oiled)
Shot Blasting (SA 2.5) + Primer Painting
Hot-Dip Galvanized (ASTM A123) for 50+ years of corrosion protection.
Technical Insight: ASTM A572 Gr.50 vs. ASTM A36
One of the most critical decisions for engineers is choosing between A36 and A572 Gr.50.
| Feature | ASTM A36 | ASTM A572 Gr. 50 | Why it Matters? |
| Yield Strength | 36 ksi (250 MPa) | 50 ksi (345 MPa) | Gr.50 is 40% stronger. |
| Weight Usage | Standard | Reduced by 20-25% | Lighter structures = Lower costs. |
| Weldability | Excellent | Superior (HSLA) | Low carbon equivalent (CE) for easy welding. |
| Best For | Light construction | Heavy-duty/High-load | Bridges, skyscrapers, machinery. |
The Bottom Line: While A572 Gr.50 has a slightly higher price per ton, the total project cost is often 15-20% lower due to reduced material volume, lower shipping costs, and simplified foundation requirements.
Why Partner with Us?
- 15 Production Lines: We operate 8 ERW lines, 4 pre-galvanized lines, and 3 hot-dipped galvanized lines, ensuring a stable supply even for large-scale global tenders.
- Logistics Edge: Our factory is located just 40km from Xingang Port (Tianjin), the largest port in North China, significantly reducing inland freight costs and lead times.
- Quality Innovation: We hold 3 national patents for specialized piping and structural sections, reflecting our commitment to R&D and engineering excellence.
- International Compliance: Fully certified by ISO, CE, BV, and SGS. All H-beams are delivered with a Mill Test Certificate (MTC) according to EN 10204 3.1.
Commercial Terms & Support
Payment: 30% T/T deposit; 70% against B/L copy | 100% Irrevocable L/C at sight.
Delivery: Average 25 days after deposit confirmation.
Loading Port: Tianjin/Xingang, China.
Samples: Free samples available upon request for quality verification.
Our technical team is ready to assist with your structural requirements, including custom cutting, drilling, and welding services.
Contact Us Now for a A572 Gr.50 Fast Quotation within 24 Hours
What is A572 GR 50 material?
Grade 50 is a Columbium-Vanadium steel that offers a minimum yield of 50,000 PSI. In addition, ASTM A572 Grade 50 is noted for its increased resistance to atmospheric corrosion.
Is A572 grade 50 formable?
A572-50 steel is less formable than other grades of A572, but for the most part it has good formability, weldability, and machinability.
Is A572 grade 50 the same as A36?
Similar to A36, it utilizes carbon and manganese for strength, but it also includes additional alloys such as columbium or vanadium. These extra alloys boost its overall strength, making A572-50 typically priced at around 2.5% - 5% higher than A36.
Is A572 grade 50 equivalent to S355?
ASTM has identified A572-50 as an acceptable substitution for S355. Both grades have similar chemical compositions and are high-strength, low-alloy structural steels.