Steel plate 1 5 GB708 08 What does GB13237 mean

GB is the meaning of the national standard, 13237 is a standard number, is the following standard name!

Standard number: GB T 13237-1991

Standard name: High quality carbon structural steel cold-rolled thin steel plate and steel strip.

Standard Status: Active.

English title: cold-rolled quality carbon structural steel shects and strips

Alternate case: GB 710-1988

Date of implementation: July 1, 1992

Promulgating department:China Iron and Steel Association.

Brief introduction: This standard stipulates the classification size, shape and technical requirements of cold-rolled thin steel plate and steel strip of high-quality carbon mechanism steel. Test Methods, Inspection Rules, Packaging, Marking and Quality Certificates.

This standard is applicable to thin steel plates and steel strips with a thickness of no more than 4mm and cold-rolled high-quality carbon structural steel used in the automotive, aviation industry and other sectors.

Is GB here the abbreviation of "national standard"?

How to stipulate the added value of GB T713-2014 standard steel plate?

Dear, I am glad to answer for you: the added value of steel plate thickness is the negative deviation of steel plate thickness. The formula for calculating the added value of the sliding thickness of the steel plate is as follows:

C C1 + C2C1 : Negative deviation of steel plate thickness. c2 ：

Corrosion margin. where: C1 represents the negative deviation of the steel plate or steel pipe (mm), and C2 represents the corrosion margin (mm).

According to GB713-2008, the negative deviation of the steel plate is the allowable deviation of the thickness according to the class B deviation of GB T 709, that is, the fixed negative deviation of Huili Zheng. Thickness additions are followed. The negative deviation of the steel plate is determined according to GB713-2008

The allowable deviation of the thickness is according to the class B deviation of GB T 709, i.e. the fixed negative deviation is.

It belongs to the German standard hot work die steel, and the executive standard: DIN 17350-1980 steel has a high CR content, has high hardenability, and the martensitic structure can be obtained by cooling during quenching. After quenching and tempering, the steel has good comprehensive properties, uniform and dense, high wear resistance and thermal fatigue expansion resistance, and small deformation.

The use of steel: hot work steel for forging, tool steel. Die-casting mold steel.

Steel Chemical Composition:

Carbon C: Silicon Si:

Manganese mn:phosphorus p:

Sulfur S: Chromium Cr:

Molybdenum mo:nickel ni:

Vanadium V: Factory Condition: Softened Annealed HB 248

Standard: DIN 17350

Grade: 56nicrmov7

Numerical Code: Chemical Composition: C:,Si:, Mn:,P: ,S: ,Cr:,Mo:, Ni:,V:

Heat treatment, forging, softening, annealing, hardening, tempering.

Purity: 1 each for A, A, 1 each of sulfides, B oxides, C silicates and D spherical oxides according to ASTM E45 or DIN 50602-K1 10 or as per customer requirements.

Shanghai Bingzheng Industrial Steel Factory Condition: Soft annealing, hardness up to 248HB.

Service status: 36-52hrc.

Grade 55NICROV 7

German w-nr

Corresponding to the standard DIN EN ISO 4957-2018 for tool steels.

tool steels

Classified as alloy steel.

Tags: Hot Work Alloy Tool Steel.

Note It is used when the surface temperature is generally more than 200 °C.

Density g cm3

Tool steel grade: 56nicrmov7

Number standard: DIN 17350

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Chromium Cr: Nickel molybdenum.

Vanadium phos p :

Sulfur s:

German DIN standard die steel is a kind of steel used in mold manufacturing.

Chemical composition. Carbon C:

Silicon si:manganese mn:

Phosphorus p: sulfur s:

Chromium Cr:Molybdenum Mo:

Nickel Ni:Vanadium V:

Factory condition: soft annealed, hardness up to 248HB

Features:1Oil-quenched and gas-quenched plastic mold steel has good hardening properties.

2.Good toughness.

3.It has good heat resistance and is also suitable for cold work tool steels.

4.Suitable for surface treatment.

5.Good polishing properties.

Mold steel has good toughness, ductility and crack resistance. Chromium is added to improve the fatigue resistance and toughness of the mold. The steel has a high CR content, high hardenability, and the martensitic structure can be obtained by cooling during quenching, which is suitable for large-scale, complex structure, precision, and long-life die-casting molds, high-performance die-casting molds, extrusion molds, etc.

Features: very good sharpening, easy processing, shortening of mold time, no need for hardening after processing, especially quenching deformation cracking, expansion and contraction, etc.

At present, there is no correspondence with Chinese materials.

Standard: DIN 17350

Grade: 56nicrmov7

Numerical Code: Chemical Composition: C:,Si:, Mn:,P: ,S: ,Cr:,Mo:, Ni:,V:

The meaning is very clear, GB T14977-2008 is a national standard. The quality of the steel plate shall meet the national standards.

GB T 14977-2008 General requirements for surface quality of hot-rolled steel plates.

This standard specifies the terms and definitions, classification, requirements, and numerical modifications of the surface quality of hot-rolled steel plates. This standard is applicable to single-rolled hot-rolled steel plates with a thickness of 3mm and 400mm and sheared steel plates sheared from hot-rolled coils, hereinafter referred to as steel plates.

GB 709-88 "Size, shape, weight and allowable deviation of hot-rolled steel plate and steel strip";

This standard specifies hot-rolled steel plates with a width greater than or equal to 600mm and a thickness of steel strips. This standard also applies to narrow steel strips slitted by wide steel belts.

Marking example: 10mm 1800mm 12000 steel plate rolled with 16mn steel is marked as:

The above information is compiled and released by Tianjin Guowei Iron and Steel;

The above two criteria, which need to be distinguished, are:

Steel for reinforced concrete Part 1: Hot-rolled round steel bars is a mandatory standard;

GB T701-2008 "Mild Steel Hot Rolled Disc Rod" is a recommended standard.

As for the scope of application, you can know it by looking at the name of the standard. But there are three more things to look at:

First, look at the design requirements, what kind of steel bar is required to be used in the design, and the corresponding corresponding standards should be selected. If the design requires the use of hot-rolled round steel bars HPB235, then steel for reinforced concrete must be selected Part 1: hot-rolled round steel bars; If the design requires the use of low-carbon steel hot-rolled disc rod Q235, then GB T701-2008 "low-carbon steel hot-rolled disc rod" should be selected.

Second, if there is no requirement for the design, it depends on the supervision or Party A's requirements.

3. If there is no requirement for design and supervision and Party A, the standards required on the steel quality certificate can be implemented.

Specific to your question, it depends on what kind of steel bar you purchase, whether it is consistent with the steel bar used in the design requirements, whether it is "hot-rolled round steel bar" or "low-carbon steel hot-rolled round rod".