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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.
Product Description
The following is a comprehensive analysis of the "S460ML Z35 HOLLOW SECTION" steel pipe, combined with European standards, performance requirements, application fields and comparative analysis:
1. Basic Definitions and standards
Name resolution:
S460ML: High-strength fine-grained structural steel in the European standard (EN 10025-4).
S: Structural Steel
When the thickness is ≤16mm, the minimum yield strength is 460MPa.
M: Thermo-Mechanical Rolling, which refines the grains through the controlled rolling and controlled cooling process;
L: Low-temperature toughness requirement (impact energy ≥27J at -50℃).
Z35: Performance grade in the thickness direction, with a reduction of area ≥35%, and resistance to lamellar tearing (such as Z-direction stress at welded joints).
Execution standard:
EN 10210 (hot-formed welded hollow profiles) or EN 10219 (cold-formed welded hollow profiles), both refer to EN 10025-4 as the material basis standard.
2. Chemical composition requirements
To balance strength, toughness and weldability, the composition is strictly controlled:
Low carbon (C≤0.16%) : Reduces hardening tendency and enhances weldability.
Low sulfur and phosphorus (S≤0.005%, P≤0.025%) : Reduce inclusions, ensure Z-direction performance and low-temperature toughness.
Microalloying: Adding niobium (Nb), vanadium (V), and titanium (Ti) to refine the grains and enhance the strength.
Typical component range (wt%) :
| Elements | C | Si | Mn | P | S | Nb+V+Ti |
| Content | ≤0.16% | ≤0.60% | ≤1.70% | ≤0.025% | ≤0.005% | ≤0.22% |
3. Mechanical properties and technical requirements
strict control of internal defects in EN 10160 S3E4 and above, and is applicable to load-bearing structures
| Performance Index | Required Value | Remarks |
| Yield strength (ReH) | ≥460 MPa (thickness ≤16mm) | The strength slightly decreases as the thickness increases (e.g., 40mm thick ≥430MPa). |
| Tensile strength (Rm) | 540-720 MPa | a balance between high strength and good plasticity |
| Elongation (A) | ≥17% | gauge length 5.65√S₀ |
| Low-temperature impact toughness | -50℃ impact energy ≥27J (Charpy V-notch) | ensures the ability to resist brittle fracture in extremely cold environments |
| The Z-direction performance | reduction of area ≥35% (Z35 grade) | controlled by ultra-low sulfur (≤0.005%) |
| Flaw detection requires | EN 10160 S3E4 and above | Internal defects are strictly controlled and it is suitable for load-bearing structures |
4. Main application fields
Structure of Polar and Alpine regions
Such as Arctic ships, low-temperature Bridges, and wind turbine towers (still maintaining toughness at -50℃)..
Heavy-duty welded structure
Marine platform nodes, pressure pipelines of hydropower stations, and beams and columns of high-rise buildings (with high resistance to layered tearing).
Energy and Chemical Equipment
Liquefied natural gas (LNG) storage tanks and gas transmission pipelines (with low-temperature resistance and pressure-bearing requirements).
Summary
The S460ML Z35 hollow profile is a high-performance welded structure tube under the European standard. It achieves a fine-grained structure through the hot mechanical rolling process. The ultra-low temperature toughness at -50℃ and the Z35 grade resistance to layered tearing are its core advantages. It is applicable to scenarios with extremely high requirements for material uniformity and welding reliability, such as polar engineering, Marine platform nodes, and super high-rise buildings. Compared with ordinary structural steel, it combines high strength and low-temperature toughness. Compared with quenched and tempered high-strength steel, its superior low-temperature performance under controllable costs is outstanding.
Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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