Rebar Hrb355 Hrb400 Hrb500 8mm 10mm 12mm 14mm 16mm Ribbed bar Deformed bar Bar

Short Description:

Size: 6mm-22mm

Length: 6m/9m/12m standard length

Rebar is a common name for hot-rolled ribbed steel bars. The grade of ordinary hot-rolled steel bar consists of HRB and the minimum yield point of the grade. H, R, and B are the first letters of the three words, Hotrolled, Ribbed, and Bars, respectively.


Product Detail

Product Tags

classification

The hot-rolled ribbed steel bar is divided into three grades: HRB335 (the old grade is 20MnSi), grade three HRB400 (the old grade is 20MnSiV, 20MnSiNb, 20Mnti), and grade four HRB500.
There are two commonly used classification methods for reinforcing bars: one is to classify according to geometric shape, and the other is to classify or classify according to the cross-sectional shape of transverse bars and the spacing of bars. Type II.This classification mainly reflects the clamping performance of the reinforcement.

The second is according to the performance classification (grade), such as the current implementation standard in my country, the rebar is (GB1499.2-2007) the wire is 1499.1-2008), and the rebar is divided into 3 according to the strength grade (yield point/tensile strength). Grade; in Japanese Industrial Standard (JI SG3112), steel bars are divided into 5 categories according to their comprehensive properties; in British Standard (BS4461), several grades of steel bar performance tests are also specified. In addition, steel bars can also be classified by use, such as ordinary steel bars for reinforced concrete and heat-treated steel bars for prestressed reinforced concrete.

rebar (8)
rebar (7)

aspect

1) Nominal diameter range and recommended diameter
The nominal diameter of steel bars ranges from 6 to 50mm, and the standard recommended nominal diameters of steel bars are 6, 8, 10, 12, 14, 16, 20, 25, 32, 40, and 50mm.
2) The allowable deviation of the surface shape and size of the ribbed steel bar
The design principles of ribbed steel bars should meet the following requirements:
The angle β between the transverse rib and the steel bar axis should not be less than 45 degrees. When the included angle is not greater than 70 degrees, the direction of the transverse bars on both sides of the steel bar should be opposite;
The nominal spacing l of the transverse bars should not be greater than 0.7 times the nominal diameter of the bars;
The angle α between the side of the transverse rib and the surface of the steel bar shall not be less than 45 degrees;
The sum of the gaps (including the width of longitudinal ribs) at the ends of transverse ribs on both adjacent sides of the steel bar shall not be greater than 20% of the nominal perimeter of the steel bar;
When the nominal diameter of the steel bar is not more than 12mm, the relative rib area should not be less than 0.055; when the nominal diameter is 14mm and 16mm, the relative rib area should not be less than 0.060; when the nominal diameter is greater than 16mm, the relative rib area should not be less than 0.065. See Appendix C for calculation of relative rib area.
Ribbed steel bars generally have longitudinal bars, and there are also those without longitudinal bars;

rebar (9)
rebar (10)

3) Length and allowable deviation
One. length
Steel bars are usually delivered in fixed lengths, and the specific delivery length should be indicated in the contract;
Steel bars can be delivered in rolls, each roll should be one steel bar, and 5% of the number of rolls per batch (less than two rolls is two rolls) consists of two steel bars. The disk weight and disk diameter are determined through negotiation between the supplier and the buyer.
b. Length tolerance
When the fixed length is delivered, the allowable deviation of the length of the steel bar is not more than ±25mm;
When the minimum length is required, the deviation is +50mm;
When the maximum length is required, the deviation is -50mm.
c. Curvature and ends
The end of the steel bar should be cut straight, and the local deformation will not affect the use

picture presentation

rebar (6)
rebar (5)

  • Previous:
  • Next:

  • shibushiwojnushuohuawomenjiuyongyuandoushiyzngyangde,nigaosuwodadiwomenzhiqinayouanaxieweneti,womenzhijandeewtnidaodikebukeyijiejue.zaishiwoemgnagwomenzhijiqnadaodidzennmene.

    werrtg

    spring

    west

    asjgowdhaogrhg

  • Write your message here and send it to us

    Related products

    • China factory direct quality stainless steel roll 304 316 stainless steel coil can be customized

      China factory direct quality stainless steel ro...

      PRODUCT DESCRIPTION Stainless steel coil is also called roll, roll material, roll plate, plate roll, with a lot of hardness. Stainless steel features: 1. Complete specifications, diverse materials; 2. High dimensional accuracy, up to ±0.1mm; 3. Good surface quality, good brightness; 4. Strong corrosion resistance, high tensile strength and fatigue strength; 5. St...

    • Steel Coil SS330 SS400 High Quality Hot Rolled Steel Coil

      Steel Coil SS330 SS400 High Quality Hot Rolled ...

      Product pictures According to different uses, it can be divided into: cold forming steel, structural steel, automobile structural steel, corrosion-resistant structural steel, mechanical structural steel, welded gas cylinder and pressure vessel steel, pipeline steel, etc. Due to its high strength, good toughness, easy processing and good weldability and other excellent properties, hot continuous rolled steel sheet products are widely used in sh...

    • Factory supply 202 301 302 304 304L 316 mirror polished stainless steel coil

      Factory supply 202 301 302 304 304L 316 mirror ...

      PRODUCT DISPLAY   PRODUCT PARAMETER Product name Factory supply 202 301 302 304 304L 316 mirror polished stainless steel coil Keyword stainless steel Technique Cold Drawn or Hot Rolled Thickness 0.1-300mm Width 1000, 1219, 1500, 2000, 2500, 3000mm etc. Length According to the actual requirements of customers. Standard ASTM JIS AISI GB DIN EN Surface Finished ...

    • China direct sales cold rolled steel coil DC01-DC06 high strength steel rolls

      China direct sales cold rolled steel coil DC01-...

      description Cold rolled coil refers to the steel strip which is rolled into a certain thickness directly by the roller at room temperature and rolled into the whole coil by the coiler. Compared with hot rolled coil, cold rolled coil surface bright, higher finish, but will produce more internal stress, after cold rolling often need annealing treatment. Hot rolled steel coil is used as raw material, after acid pickling to remove the oxide scale,...

    • Large and small diameter thick and thin wall seamless steel tube No. 20 45#20cr40crQ345B alloy seamless pipe support cutting

      Large and small diameter thick and thin wall se...

      PRODUCT DESCRIPTION Stainless steel plate surface smooth, high plasticity, toughness and mechanical strength, acid, alkaline gas, solution and other media corrosion. It is an alloy steel that is resistant to rust, but not absolutely resistant to rust. Stainless steel platerefers to atmospheric, steam and water and other weak medium corrosion of steel plate, and a...

    • Hot Rolled Steel Sheet astm A36 Ss400 Q235b Sheet Carbon Steel Plate 30mm Thick Price

      Hot Rolled Steel Sheet astm A36 Ss400 Q235b She...

      description Hot-rolled coils are made of slabs (mainly continuous casting slabs) as raw materials, which are heated and made into strips by rough rolling mills and finishing mills. The hot steel strip from the last rolling mill of the finishing rolling is cooled to the set temperature by laminar flow, and is coiled into a steel coil by the coiler. The finishing line (leveling, straightening, cross-cutti...