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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
BASIC INFORMATION
NZS 1163 HOLLOW SECTION
Standard: NZS 1163
Grade: C250, C250L0, C350, C350L0, C450, C450L0
Outside diameter: 20*20 - 1200*1200 Wall Thickness: 1.3 - 50mm
Outside diameter: 20*20 - 1200*1500 Wall Thickness: 1.2 - 50mm
The Wall Thickness Tolerance: ±5%
Length: normally 5.8m, 6m, 12m or as your required
Surface Treatment: Bare Finish, Painting, Oiling, Galvanzation, 3PE, FBE coated......
CHEMICAL COMPOSITION
Grade | Chemiacal Composition | ||||||||
C | Si | Mn | P | S | Cr | Mo | Al | Ti | |
C250 | 0.12 | 0.05 | 0.50 | 0.03 | 0.03 | 0.15 | 0.10 | 0.10 | 0.04 |
C350 | 0.20 | 0.45 | 1.60 | 0.03 | 0.03 | 0.30 | 0.10 | 0.10 | 0.04 |
C450 | 0.20 | 0.45 | 1.70 | 0.03 | 0.03 | 0.50 | 0.35 | 0.10 | 0.04 |
PHYSICAL REQUIREMENT
Grade | Minimum yield strength(MPa) | Minimum tensile strength(MPa) | Minimum Elongation(%) | |||||
Circular hollow section | Rectangular hollow section | |||||||
≤15 | ＞15≤30 | ＞30 | ≤15 | ＞15≤30 | ＞30 | |||
C250 | 250 | 320 | 18 | 20 | 22 | 14 | 16 | 18 |
C350 | 350 | 430 | 16 | 18 | 20 | 12 | 14 | 16 |
C450 | 450 | 500 | 12 | 14 | 16 | 10 | 12 | 14 |
FEATURES OF NZS 1163 HOLLOW SECTION
The NZS 1163 HOLLOW SECTION is a cold formed welded structural steel hollow profile with the following characteristics:
With a high strength-to-weight ratio, such as the yield strength of the C250 and C350 grades of 250 MPa and 350 MPa respectively. This characteristic allows it to withstand large loads without adding too much weight.
Due to its closed section shape, it is highly resistant to torsional forces and can provide better stability under complex load conditions.
The closed section design distributes stress more evenly and reduces the possibility of buckling under compressive loads.
Although the price per unit weight may be slightly higher than that of solid profiles, their material utilization is more efficient, transport costs are low, processing and installation are simple, and the construction period can be shortened, thus achieving cost savings for the overall project.
The standard specifies a variety of surface treatments, such as coating, galvanizing, etc., to enhance corrosion resistance and service life.
The production process needs to carry out dimensional accuracy, mechanical performance testing, chemical composition analysis, welding quality inspection and other comprehensive quality testing.
Application of NZS 1163 HOLLOW SECTION
Structural frames: Load-bearing structures such as columns, beams and trusses used in residential, commercial and industrial buildings.
Tall buildings: key load-bearing components for tall buildings.
Architectural features and decorations: Used for walkways, railings, sign structures, etc., their lightweight and easy installation characteristics make them ideal for enhancing the function and beauty of public Spaces and urban landscapes.
Bridge construction: Beams, columns and support structures for Bridges that can withstand large loads and complex stress conditions.
Transportation infrastructure: Supporting structures and framing systems for transportation facilities such as highways and railways.
Industrial buildings and facilities: Frame structures for industrial plants and warehouses, as well as machinery, material handling systems and shelves.
Mechanical frame: used to manufacture various mechanical parts and industrial equipment, such as conveying systems, processing lines, etc.
Temporary structure and emergency response: Due to its rapid installation and disassembly characteristics, it is often used in the construction of temporary structures and emergency response structures.
Furniture manufacturing: Because of its lightweight and high strength characteristics, it can also be used in the manufacture of furniture frames.
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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