What does A193 GR B7 mean?

ASTM A193 B7 belongs to the American standard alloy structural steel for high-temperature bolts, and the executive standard: ASTM A193 A193M-2017

ASTM A193 B7 steel is an ultra-high strength steel, which has high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness. ASTM A193 B7 steel is suitable for the manufacture of large and medium-sized plastic molds and high-strength, high-temperature bolts and nuts that require a certain strength and toughness.

The chemical composition of ASTM A193 B7 is shown in the following figure:

The above brother's explanation makes many people not understand, A193 B7 refers to a material, 35 chromium-molybdenum and 42 chromium-molybdenum materials used in China, this bolt is actually called a screw or stud bolt. It is generally used in places with strong pressure. It is used in many industries such as pressure vessels, valves, and marine equipment.

Hope it helps.

A193 is A193 class B7, which is a type of ASTM standard.

ASTM is the English abbreviation of the American Society for Testing and Materials. The technical association was founded in 1898.

Among them, A193 is the standard number of "alloy steel and stainless steel bolt materials for high-temperature equipment".

For more information, please read here.

Alloy steel bolt material for high temperature, A193 is a standard code for American standard bolt materials, American standard, ASTMA193B7 alloy steel bolt material for high temperature.

It is equivalent to the domestic 42CrMOA material, and B7 is the material grade.

Basic Information. 42crmoa

Alloy structural steel abbreviation, 42CRMOA is one of the bonded steel, the implementation standard GB T3077-1999.

Unified numerical code A30422; Grade: 42Crmoa;

Alloy steel bolt material for high temperature, A193 is a standard code of American standard bolt material, B7 is the material grade;

It is equivalent to the domestic 42CRMO or 42CRMOA chromium-molybdenum alloy structural steel, which is suitable for alloy steel and stainless steel bolt materials on pressure vessels, valves, flanges and fittings used at high temperatures.

The chemical composition and mechanical properties of A193 GR B7 bolts should meet the requirements of A193 GR B7 standard, and the chemical composition and mechanical properties of A194 GR 2H nuts should meet the requirements of A194 GR 2H nut standards. A194 GR 2H nut material can be made of 45 steel, A193 GR B7 bolt material can buy B7 material, B7 material can be bought in China.

This is the American standard, the chemical composition and mechanical properties of A193 GR B7 bolts should meet the requirements of A193 GR B7 standard, and the chemical composition and mechanical properties of A194 GR 2H nuts should meet the requirements of A194 GR 2H nut standard. Yu Wenlong, a fastener consultant, believes that the A194 GR 2H nut material can be made of 45 steel, and the A193 GR B7 bolt material can be bought with B7 material, and the B7 material can be bought in China. The strength grade must be American standard, and there is no domestic standard that can replace it.

For details, please refer to the American Fastener Standard Encyclopedia IFI British Fastener Standard Manual 8th Edition, and the FI Imperial Fastener Standard Manual 8th Edition can be purchased from me. Yu Wenlong, a fastener consultant, believes that it is best to check the relevant standards by yourself, and it is always fake on the Internet. The light ones are unqualified in terms of product quality, and the heavy ones will be fined.

Of course, fastener consultant Yu Wenlong believes that if you have the strength, ask a fastener consultant to refer to your technology, grasp the direction of enterprise development, positioning products, positioning customers is also a good choice.

ASTMA193, GR B7, is close to the domestic 42CrMo material, but the Mo and MN elements in B7 are slightly higher than the national standard 42CrMo. Now there are special materials in China, and various chemical compositions fully meet the requirements of ASTMA193, GR B7. Our company can also produce bolt studs that fully comply with the requirements of ASTMA 193, GR B7.

Specifically, you can refer to the relevant standards, or you can refer to the American fastener standard encyclopedia "IFI 7th Edition", or "IFI 8th Edition", etc. There is a detailed introduction inside.

The material of 35 chromium-molybdenum and 42 chromium-molybdenum used in China.

ASTM A193 GR B7 belongs to the American standard alloy structural steel for high-temperature bolts, the implementation standard: ASTM A193 A193M-2017

ASTM A193 GR B7 steel is an ultra-high-strength steel with high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness. ASTM A193 GR B7 steel is suitable for the manufacture of large and medium-sized plastic molds and high-strength, high-temperature bolts and nuts that require a certain strength and toughness.

The chemical composition of ASTM A193 GR B7 is shown in the following figure:

In terms of chemical composition, ASTM A193 GR B7 is equivalent to the domestic grade: 42CrMo

Shorthand for grade. It is A193 B7 grade steel, which is used as petrochemical bolts for medium and high temperatures!

It is equivalent to the domestic 42CrMOA material.

Equivalent to 40 steel.

A193 GR B7 A194 GR 2H Bolts of this combination are available in China.

This is the bolt material, our company generally uses the commonly used 35CrMoA 30Crmo generation. This is recognized by the Beijing Design Institute, and this rule is widely used within Sinopec.

This is the American standard, the chemical composition and mechanical properties of A193 GR B7 bolts should meet the requirements of A193 GR B7 standard, and the chemical composition and mechanical properties of A194 GR 2H nuts should meet the requirements of A194 GR 2H nut standard. A194 GR 2H nut material can be made of 45 steel.

A193 GR B7 bolt material to buy B7 material, B7 material can be bought in China. The strength grade must be American standard, and there is no domestic standard that can replace it. For details, please refer to the American Fastener Standard Encyclopedia IFI Imperial Fastener Standard Manual 8th Edition, IFI Imperial Fasteners.

The eighth edition of the Standard Manual can be purchased from me.

1. The bolt material indicated above is high-temperature alloy steel B7; The back indicates the material of the nut 2h; This kind of supporting usage is generally common in petrochemical industry, drilling platform, pressure vessel and other fields;

2. The front indicates that the bolt material is high-temperature stainless steel, a requirement; 660 is divided into A, B, and C in the ASTM standard; The back indicates the material of the nut 8c; The material of 8C is the stainless steel 347 material of American Standard; This kind of supporting usage is generally common in nuclear power, petrochemical industry, drilling platform, boiler, pressure vessel and other fields;

This is the American fastener standard. ASTM A193 A194, bolt material is ASTM A193, nut material is ASTM A194. ASTM A453 A194, Bolt Material ASTM A453, Nut Material ASTM A194.

For the standard, please refer to the latest fastener standards in the United States, "IFI Inch Fastener Standards Book" (English Edition) (published in 2011), bolts and nuts can be ordered by me.