Rebar 4eth representative

『One』What does 4cg14 on rebar mean

What does 4cg14 on rebar mean:
1, 4 represent HRB500.
2. cg represents the manufacturer.
3, 14 represent that the diameter of the rebar is 14 mm.
4. 4cg14 on the rebar represents a hot-rolled ribbed steel bar with a yield strength of 500 and a diameter of Φ14 produced by the manufacturer abbreviated as cg.
5. The grade of rebar 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.
6. Hot-rolled ribbed steel bars are divided into three grades: HRB335 (the old brand is 20MnSi), HRB400 (the old brand is 20MnSiV, 20MnSiNb, 20Mnti), and HRB500.
7. There are two commonly used classification methods for rebar: one is classification by geometric shape, and the classification or classification is performed according to the cross-sectional shape of the transverse rib and the spacing of the ribs. This classification method mainly reflects the grip of the rebar. tight performance. The second is based on performance classification (grade), and the rebar is divided into several grades according to the strength level (yield point/tensile strength). In addition, rebars can also be classified according to their uses, such as ordinary steel bars for reinforced concrete and heat-treated steel bars for prestressed reinforced concrete.

『Ⅱ』What does the 4e on the threaded rebar mean?

The 4e on the threaded rebar means HRB400 seismic rebar (HRB400e). 4 is HRB400 (formerly known as grade 3 steel bar), e is the e of earthquake, which means earthquake resistance. The steel bars marked with e have reached the “seismic” steel standard published by the state.

hrb400e refers to the three-level seismic reinforcement. Compared with ordinary steel bars, the biggest advantage is that the tensile strength and elongation are relatively large. For example, the tensile strength of ordinary hrb400 grade 3 steel bars is required to be greater than 400 MPa; and if it is hrb400e seismic steel bars, the tensile strength needs to reach Above 550MPa.

In addition, the elongation of anti-seismic steel bars is required to be no less than 9%, which is much higher than the standard of ordinary steel bars. It is the improvement of these technical indicators that strengthens the seismic resistance of steel bars, so that when they are tilted and deformed, they can be stably lifted without breaking, reducing some casualties.

HRB335 (20MnSi), the standard value of the yield strength of this steel bar is 335MPa, the diameter is 6~50mm, and the elastic modulus is 200GPa. HRB400 (20MnSiV, 20MnSiNb, 20MnTi), the standard value of yield strength of this steel bar is 400MPa, and the design value is 330MPa. Diameter 6 ~ 50mm, elastic modulus 200GPa.

(2) Rebar 4eth represents extended reading:

The difference between rebar and smooth round bar is that there are longitudinal ribs and transverse ribs on the surface, usually With two longitudinal ribs and transverse ribs evenly distributed along the length. Rebar is a small section steel, mainly used for the skeleton of reinforced concrete building components.

It is required to have certain mechanical strength, bending deformation performance and process welding performance in use. The raw material billets for producing rebar are carbon structural steel or low-alloy structural steel that has been smelted by sedation, and the finished steel bars are delivered in hot-rolled, normalized or hot-rolled state.

Chemical Properties

1. Yield point (physical yield strength): During the tensile process of the sample, the load does not increase or begins to decrease, and the sample can continue to deform and remains constant. The stress obtained by dividing the maximum or minimum load by the original cross-sectional area is the yield point, upper yield point, and lower yield point of the specimen, respectively.

2. Tensile strength (strength limit): when the sample is stretched, the maximum load it bears before breaking is divided by the original cross-sectional area, which is called tensile strength. The maximum ability of rebar to resist damage under tension.

3. Elongation (elongation): After the sample is broken, the percentage of the length of the gauge length increased to the original gauge length is called the elongation.

The difference between tertiary rebar and secondary rebar can be divided into the following aspects:

1. Different steel types (different chemical compositions). HRB335 steel bar is 20MnSi (20 manganese silicon); HRB400 steel bar is 20MnSiV or 20MnSiNb or 20MnTi, etc.; The tensile and compressive design strength of the steel bar is 360MPa.

3. Due to the difference in the chemical composition and ultimate strength of steel bars, there are also differences in toughness, cold bending, fatigue resistance and other properties.

『三』What does 4ZY on the rebar mean

4 represents the grade of rebar, and hrb400e represents the third grade rebar. As for zy referring to a steel mill, I am not very clear about what steel mill, it should be an unknown small factory.

『四』 What does 4GJ mean on the rebar of 22 straight warp

The letters on the rebar are registered factory names or trademarks. The number at the front of the rebar represents the grade of the rebar, such as 3 for grade 2 steel, 4 for grade 3 steel, and 5 for grade 4 steel. The next two digits represent the specifications of the rebar, and the letters between the grade and the specification represent the rebar manufacturer.
Reinforcement grades are represented by Arabic numerals or Arabic numerals plus English letters, HRB335, HRB400, HRB500 are represented by 3, 4, 5 respectively, HRBF335, HRBF400, HRBF500 are represented by C3, C4, C5 respectively. The factory name is indicated by the Chinese pinyin prefix. The nominal diameter in millimeters is expressed in Arabic numerals.

4GJ22 These are the basic information of steel bars, which are equivalent to ID card information. The steel mill representing the fourth grade steel (HRB500) code GJ is Hangzhou Iron and Steel; then the nominal diameter is 22.

『Wu』 Rebar grade 3, grade 4, grade 5 represent what

The material of grade 3 rebar is HRB400E. The material of grade 4 rebar is HRB500E. Grade 5 rebar I haven’t heard of yet. Take a look at these for reference.

『Lu』 Who knows what the letters on the rebar stand for. Thank you.

4E is the steel bar grade HRB400E, the back 16 is the steel bar diameter, and the middle may be the manufacturer Code name: just my personal opinion, I hope it can be helpful to you; This is the first time to see steel bars. Usually, the steel bars used in construction projects are of HPB or HRB grades. Even if it is
seismic steel bars
, E is added after the grade, such as
HRB400
E.

『渌』What do the letters on the rebar mean

grade, nominal diameter and strength grade

『玖』 What does the number on the rebar represent, what does 4 GMH 12 mean, what grade of steel, and which steel mill produced it

Abstract 4 refers to the third grade rebar, GMH refers to the abbreviation of the steel mill, It should be Guiyang Iron and Steel Plant, 12 refers to the specification of the steel bar, the diameter is 12mm Common name for steel. 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.

The hot-rolled ribbed steel bar is divided into three grades: HRB335 (old grade is 20MnSi), grade three HRB400 (old grade is 20MnSiV, 20MnSiNb, 20Mnti), grade four HRB500.

1. First-class rebar symbol:

Extended material:

The rebar is a hot-rolled rib Common name for steel. 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.

There are two commonly used classification methods for rebar: one is classification by geometric shape, which is classified or classified according to the cross-sectional shape of the transverse rib and the spacing of the ribs. For example, in the British Standard (BS4449), the Rebar is divided into type I and type II. This classification mainly reflects the gripping performance of the rebar.

The second is based on performance classification (grade), such as the current implementation standard in my country, rebar is (GB1499.2-2007) wire rod is 1499.1-2008), according to the strength level (yield point / tensile strength Strength) divides rebar into 3 grades.

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