a profile of the classification
| 1. Simple section steel: ① square steel - hot rolled square steel, cold drawn square steel; ② round steel - Hot rolled round steel, wrought round steel, cold drawn bar; ③ wire; ④ flat; (5) spring steel; ⑥ angle - side angle, unequal angle; ⑦ triangular steel; ⑧ six angles; ⑨ arched steel; ⑩ oval steel. | 2. Complex section steel: ① beam - beam, a light beam; ② channel steel - hot rolled channel (channel light channel), the curved channel; ③ The H-section steel (also known as wide-leg beam); ④ rail - heavy rail, light rail, crane rail, dedicated rail; (5) window frames steel; ⑥ steel sheet pile; The ⑦ bending steel - cold-formed steel, bending steel; ⑧ other. |
two, steel, medium and small division
I-beam high ≥ 180mm <180mm;
Channel high ≥ 180mm <180mm;
Side equilateral angle steel side width ≥ 160mm wide 50-140mm edge width 20-45mm;
Unequal angle edge width ≥ 160 × 100mm side width 140 × 90-50 × 32 mm edge width ≤ 45 × 28 mm;
The round bar diameter ≥ 90mm diameter 38-80mm diameter 10-36 mm;
Side edge width ≥ 90mm square steel edge width 50-75 mm, width 10-25 mm;
Flat width ≥ 120mm wide and 60-100 mm wide and 12-55 mm;
Rebar diameter ≥ 40 mm diameter, 10-36 mm;
Rivet steel diameter of 10-22 mm;
Other special-shaped steel track shoes, steel sheet pile steel.
, hot-rolled H section steel
A hot-rolled H-beam representation. H-beam is divided into three types of wide-flange H beam (HK), narrow flange H beam (HZ) and H-shaped steel piles (HU). Expressed as: height H × width B × web thickness t1, × flange thickness t2, such as the H-shaped steel of Q235, SS400 200 × 200 × 8 × 12, said high 200mm wide and 200mm web thickness of 8mm, the flange thickness of 12mm wide-flange H-beam, grade Q235 or of SS400.
Two. Advantages of hot-rolled H section steel. H-shaped steel is a new economic construction steel and H-shaped steel section shape of economic rationality, and good mechanical properties, rolling cross-section extension than the uniform internal stress, compared with the ordinary beam, with a section modulus, light weight saving advantages of metal building structure can reduce 30-40%; but also because of the lateral parallel to the leg, the leg-side is at right angles, and assembled into components, you can save welding, riveting work amounted to 25%. Commonly used in the requirements of the Order of the cut-off ability, good cross-section stability of large buildings (such as factories, high-rise buildings, etc.), as well as bridges, ships, lifting and transport machinery, equipment foundations, brackets, foundation piles.
cold-formed steel cross-section of light is an economical thin-walled steel, also known as steel cold-formed sections or cold-formed profiles. It is based on hot-rolled or cold-rolled strip made blank by bending the cross section shape and size of steel. Cold-formed steel has the following characteristics:
A. Reasonable cross-section of economic and material savings. Cross-sectional shape of the cold-formed steel design, reasonable structure, the modulus of section of the unit weight than hot-rolled steel. In the same load, to reduce component weight, save material. Cold-formed steel for building structures than hot-rolled steel metal 38-50% savings, saving metal by 15-60% for agricultural machinery and vehicles. Facilitate construction and reduce the overall costs.
Two. A wide variety of cold-formed steel hot rolling method generally difficult to produce uniform thickness, and complex cross-section shape a variety of profiles and a variety of materials can be produced.
3. Smooth surface appearance, size, precision, length can be flexibly adjusted, all cut to length or double length supply, improve material utilization.
4. Also with punching processes to match production to meet different needs. A wide variety of cold-formed steel, sub-section shape, openings, semi-closed and closed, the main products are cold-formed channel steel, angle steel, Z section steel, cold-formed corrugated steel, square tube, rectangular tube, welding shaped steel tube, roller shutter doors and so on. Usually the production of cold-formed steel, thickness less than 6mm, width less than 500 mm. The products are widely used in mining, construction, agricultural machinery, transportation, bridges, oil and chemical industry, light industry, electronics and other industries.