Zn Coating Mild Steel Black Galvanized Unequal Angle Steel
Component indicators: the chemical composition of the angle steel is a general structural rolling steel series, the main verification indicators are C, Mn, P, S four. Depending on the grade, the content varies, with the approximate range of C<0.22%, Mn: 0.30-0.65%, P<0.060%, S<0.060%.
1. Test methods.
1) Tensile test method. Commonly used standard test methods are GB/T228-87, JISZ2201, JISZ2241, ASTMA370, ГОСТ1497, BS18, DIN50145, etc.
2) Bending test method. Commonly used standard test methods are GB/T232-88, JISZ2204, JISZ2248, ASTME290, ГОСТ14019, DIN50111, etc.
2. performance indicators: the test items to assess the performance of angle steel are mainly tensile test and bending test. Indicators include yield point, tensile strength, elongation and bending qualified items.
Angle steel is widely used in various building structures and engineering structures, such as house beams, bridges, power transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouse shelves, etc.
It is mainly divided into two categories: equal-sided angle and unequal-sided angle, of which unequal-sided angle can be further divided into unequal-sided equal-thickness and unequal-sided unequal-thickness.
The specifications of the angle steel with side length and side thickness of the size of the representation. At present, the domestic angle steel specifications for 2-20, the number of centimeters for the number of side length, the same number of angles often have 2-7 different side thickness. Imported angles are marked with the actual size of both sides and the side thickness and indicate the relevant standards. Generally, the side length of 12.5cm or more is large angle, between 12.5cm-5cm is medium angle, and the side length of 5cm or less is small angle.
Equilateral angle vector drawing
Equilateral Angle Vector
The order of import and export angle steel is generally based on the specifications required in use, and its steel number is the corresponding carbon knotted steel number. Also angle steel has no specific composition and performance series in addition to the specification number. The delivery length of angle steel is divided into two kinds of fixed length and double length. The range of fixed length selection of domestic angle steel is 3-9m, 4-12m, 4-19m and 6-19m depending on the specification number. The length selection range of Japan-made angle steel is 6-15m.
The section height of unequal angles is calculated by the width of the long side of unequal angles. It refers to steel with an angular cross section and unequal lengths on both sides. It is one of the angles. Its side length is from 25mm×16mm to 200mm×l25mm, which is rolled by hot rolling mill.
The general specifications of unequal angles are: ∟50*32--∟200*125 Thickness is 4-18mm.
GB/T2101-2008 (general provisions for acceptance, packaging, marking and quality certification of steel sections)
GB/T706-2008 (replacing GB/T9787-88 GB/T9788-88) (size, shape, weight and permissible deviation of hot-rolled equilateral / unequal angles).
JISG3192-94 (Shapes, dimensions, weights and their allowable deviations of hot-rolled sections).
DIN 17100-80 (quality standards for ordinary structural steel).
ГОСТ535-88 (technical conditions for ordinary carbon sections).
According to the above-mentioned standards, the angles shall be delivered in bundles, the bundles shall be tied, and the length of the bundles shall be in accordance with the regulations. Angles are generally delivered in bare packages and need to be protected from moisture for transportation and storage.
| Specification(side length*thickness)mm | Mass(kg/m) | Specification(side length*thickness)mm | Mass(kg/m) |
| 20~75*3~10 | 0.89~11.9 | 80~200*5~18 | 6.21~48.63 |
| 200*16 | 48.68 | ||
| 200*18 | 54.4 | ||
| 200*20 | 60.06 | ||
| 200*24 | 71.17 |
| Specification(L*W*Th)mm | Quality(kg/m) | Specification(L*W*Th)mm | Quality(kg/m) |
| 25~90*16~56*3~10 | 0.91~10 | 100~200*63~125*6~18 | 7.55~43.6 |
| 90*56*8 | 8.78 |
