How do you see the quality of rebar? How to judge the quality of rebar

1. From the perspective of surface quality, there are no cracks, scars and folds on the surface of regular steel. The surface is allowed to have bumps, but not more than the height of the cross rib, and there should also be a quality grade mark on the surface of the reinforcement.

Counterfeit and inferior rebar.

Due to the use of adobe rolling.

Its surface quality is poor, often with burrs, burrs, cracks, scars, some obvious distortions, untidy ends, and even cracks. At the same time, due to the insufficient heating temperature and rolling speed, the surface color of some small rolling mills is reddish and uneven.

2. From the appearance size, vernier calipers can be used.

Simply measure whether the actual size is consistent with the marked size (generally the rebar is rolled with specification marks), and if there is a difference, whether it is in the standard deviation.

Inner (such as the standard inner diameter of 16 rebar, and the inner diameter of fake and inferior rebar is mostly about 13mm).

3. Most of the regular steel products are packaged in large bundles when they leave the factory, and the metal signs corresponding to the physical objects are hung on the bundles of steel, indicating the factory name, steel bar grade, batch number, specification and inspection code.

Due to the poor production conditions, there is no large-scale hoisting equipment, and most of the small bundles (about ten bundles) are packaged or bulk, and there are no metal signs and no quality assurance certificates.

Industry standards. Appearance quality.

Surface. The surface quality of rebar is stipulated in the relevant standards, requiring that the end should be cut straight, and there should be no cracks, scars and folds on the surface, and there should be no harmful defects in use.

Allowable value for dimensional deviation. The requirements for the bending of the rebar and the geometry of the rebar are specified in the relevant standards.

Standard number. Ferroconcrete.

Steel Part 2: Hot-rolled ribbed steel bars.

Steel for reinforced concrete Part 2: hot-rolled ribbed steel bars "National Standard No. 1 Modification List; GB T 2101-2008 (section steel.

General provisions for acceptance, packaging, marking and quality certificates);

reinforcing bars for concrete); JIS G3112-87(98) (reinforced concrete rod steel); JISG3191-66(94) (shape, size, weight and tolerance of hot-rolled bar and coil bar); BS4449-97 (hot-rolled steel bars for concrete structures).

Ingredient testing. 1) Test method: The standard test methods commonly used for the inspection and analysis of the above chemical components are as follows: GB T223, JISG1211?1215, BS1837, BS Manual 19, etc.

2) Composition index: the main indicators for assessing the composition content of rebar are: C, MN, P, S, SI and other items, the grades are different, the content is different, and its approximate range is: C (<

Rebar is a small section steel steel, which is mainly used for the skeleton of reinforced concrete building components.

Weight difference: 6mm 12mm rebar is allowed to have a maximum difference of 7%, 14mm 20mm rebar is allowed to have a maximum difference of 5%, and 22mm 50mm rebar is allowed to have a maximum difference of 4%.

The specification requirements for rebar should be set out in the import and export ** contract. Generally, it should include the standard grade (type code), the nominal diameter of the rebar, the nominal weight (mass), the specified length and the tolerance value of the above indicators. China's standard recommends a series of rebar with a nominal diameter of mm.

The length of supply is divided into two types: fixed length and double ruler.

China's export rebar sizing sizing selection range is 6 12m, and the sizing range of Japanese rebar is; If there is no requirement in the contract for domestic rebar, the length of the domestic rebar is usually 9m and 12m.

Appearance quality. 1. Surface quality. The surface quality of rebar is stipulated in the relevant standards, requiring that the end should be cut straight, and there shall be no cracks, scars and folds on the surface, and there shall be no harmful defects in the use of cores.

2. Allowable value of dimensional deviation. The curvature of the rebar and the requirements for the geometry of the steel rebar are specified in the relevant standards.

Summary. Why do some rebar anti-counterfeiting have some and some don't! Hello, I am glad to answer for you<> the reason why there are some pro-rebar anti-counterfeiting and some are not, which effectively curbs the phenomenon of counterfeit and shoddy steel and maintains the market credibility of Angang brand.

The new high-temperature resin brand is used on the production of rebar, which has the characteristics of anti-counterfeiting, high temperature resistance, water immersion resistance, etc., and the uppercase watermark letter in the lower right corner of the sign is the corresponding bundle number, which is used for the internal warehousing and delivery tracking of the group company; There are two *** on the right side of the front of the sign, and the *** on the top is the sign information***, which is convenient for users to collect material information. The following is the anti-counterfeiting query code, mobile phone WeChat or QQ and other scans directly jump to the authenticity query system interface of Angang quality assurance certificate, enter the corresponding product information to query the authenticity, in this way, you can use mobile phone scanning to identify the authenticity anytime and anywhere, and affix the electronic information label with the nature of "ID card" to Angang rebar, which effectively curbs the phenomenon of counterfeit and shoddy steel and maintains the market credibility of Angang brand. Hope mine can help you <>

Do you have any other questions?

Why do some rebar anti-counterfeiting have some and some don't?

For the dry fierce know what rebar anti-counterfeiting, some have some not, dear! Hello, I am glad to answer for you<> the reason why there are some pro-rebar anti-counterfeiting and some are not, which effectively curbs the phenomenon of counterfeit and shoddy steel and maintains the market credibility of Angang brand. The new high-temperature resin brand is used on the production of rebar, which has the characteristics of anti-counterfeiting, high temperature resistance, water immersion resistance, etc., and the uppercase watermark letter in the lower right corner of the sign is the corresponding bundle number, which is used for the internal warehousing and delivery tracking of the group company; On the right side of the front of the sign, there are a total of two ***, and the *** above is the sign information***, which is convenient for users to collect material information when entering the site.

The following is the anti-counterfeiting query code, mobile phone WeChat or QQ and other scans directly jump to the authenticity query system interface of Angang quality assurance certificate, enter the corresponding product information to query the authenticity, in this way, you can use mobile phone scanning to identify the authenticity anytime and anywhere, and affix the electronic information label with the nature of "ID card" to Angang rebar, which effectively curbs the phenomenon of counterfeit and shoddy steel and maintains the market credibility of Angang brand. I hope mine can help you <>

Do you have any other questions?

Why are there some anti-counterfeiting rebar fish rods of Han Academy, and some are not how to distinguish **.

The way to identify ** is 1. Check the anti-counterfeiting mark. 2. Check the appearance, finish, and feel of the closed stove fishing rod. Paint uniformity. 3. Check whether the orange on the inner wall of the fishing rod is uniform.