U-shaped steel (full name: hot rolled U-shaped steel for mine roadway support)
U-shaped steel is a kind of steel with a cross section like the English letter "U", and sometimes the cross section is in the shape of the Japanese letter "ひ".
The latest standard is the national recommended standard issued in 2008 and implemented on April 1, 2009
GB/T 4697-2008
U-shaped steel support
Main features: large pressure, long support time, easy installation and not easy deformation.
Main uses: it is mainly used for secondary support of mine roadway, mine roadway, and support of mountain tunnel.
U-shaped steel is widely used at home and abroad as the main section steel for manufacturing the retractable metal support of roadway.
However, due to the different understanding of the properties and requirements of U-shaped steel, the cross-sectional shape, geometric parameters and materials of U-shaped steel are different in different countries.
There are four types of U-shaped steel produced in China: 18u, 25U, 29U and 36U. Among them, the first two are products of the 1960s, which belong to waist positioning; The latter two are products of the 1980s, belonging to ear positioning. U18 is rarely produced due to its low bearing capacity.
In GB / T 4697-2008, 40u is added in addition to the above four types of U-shaped steel.
The unit weight of each type of U-shaped steel is as follows:
18UY 18.96 kg/m
25UY 24.76 kg/m
25U 24.95 kg/m
29U 29 kg/m
36U 35.87 kg/m
40U 40.05 kg/m
Where the model with "Y" on the back indicates waist positioning.
Type name of U-shaped steel: cold-formed U-shaped steel, large-size U-shaped steel, U-shaped steel for automobile, hot-dip galvanized U-shaped steel and other open-ended cold-formed steel.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
|
Thickness
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Outside
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Inside
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Corner Shape
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|---|---|---|---|---|---|---|---|---|---|
| Leg | Base | Base Thickness Tolerance |
Ht. | Ht. Tolerance | Wd. | Ht. | Wd. | Outside | Inside |
| 0.141" | 1/8" | -0.01" to 0.01" | 3/8" | -0.063" to 0.063" | 3/4" | 1/4" | 1/2" | Square | Round |
| 0.141" | 1/8" | -0.01" to 0.01" | 1/2" | -0.063" to 0.063" | 1" | 3/8" | 3/4" | Square | Round |
| 0.141" | 1/8" | -0.01" to 0.01" | 3/4" | -0.063" to 0.063" | 1 1/2" | 5/8" | 1 1/4" | Square | Round |
| 0.141" | 1/8" | -0.01" to 0.01" | 1" | -0.063" to 0.063" | 2" | 7/8" | 1 3/4" | Square | Round |
| 0.25" | 3/16" | -0.015" to 0.015" | 1" | -0.063" to 0.063" | 2" | 13/16" | 1 5/8" | Square | Round |
| 0.25" | 1/4" | -0.02" to 0.02" | 5/8" | -0.063" to 0.063" | 2" | 3/8" | 1 1/2" | Square | Round |
01 DERECT DEAL
We have been specialized in
producing steel for many years
- 02 COMPLETE
- SPECIFICATIONS
SHAPE: U C SECTION
SURFACE TREATMENT:BARE OR OILED OR GALVANIZED
Length:1-12M
3 CERTIFICATION IS
COMPLETE
can produce steel pipe products of world
stardard,such as European standard,American standard,
Japanese standard,Astralian standard,natinal standard
and so on.
04 LARGE INVENTORY
Common specifications perennial inventory of
200000 tons
THE ONLY
rectangular tube manufacturer selected into the top ten steel tube brands in China
THE QUALIFIED RATE OF PRODUCTS >100%
A: We are factory.
A: Generally it is 5-10 days if the goods are in stock. or it is 30 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge with the cost of freight paid by customer.
A: Payment<=1000USD, 100% in advance. Payment>=1000USD 30% T/T in advance ,balance before shippment.If you have another question, pls feel free to contact us as below
The company attaches great importance to the quality of products, invests heavily in the introduction of advanced equipment and professionals, and goes all out to meet the needs of customers at home and abroad.
The content can be roughly divided into: chemical composition, yield strength, tensile strength, impact property, etc
At the same time, the company can also carry out on-line flaw detection and annealing and other heat treatment processes according to customer needs.
https://www.ytdrintl.com/
E-mail :sales@ytdrgg.com
Tianjin YuantaiDerun Steel Tube Manufacturing Group Co., Ltd. is a steel pipe factory certified by EN/ASTM/ JIS specializing in the production and export of all kinds of square rectangular pipe, galvanized pipe, ERW welded pipe, spiral pipe, submerged arc welded pipe, straight seam pipe, seamless pipe, color coated steel coil, galvanized steel coil and other steel products.With convenient transportation, it is 190 kilometers away from Beijing Capital International Airport and 80 kilometers away from Tianjin Xingang.
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