What does stainless steel screw A193 B7 mean?

A193 is a standard number of the American Materials Society, and B7 is the code of one of the materials in the standard.

B7 is the ASTM A193 A193M "Alloy Steel and Stainless Steel Bolt Materials at High Temperatures" standard applicable to alloy steel and stainless steel bolt materials on pressure vessels, valves, flanges, and fittings used at high temperatures.

A193 B7 (or A193 B7M) standard grade of mechanical properties, the corresponding minimum tensile strength is;

The minimum yield strength is; The elongation is 16(18); The maximum hardness is HRC35 (HB235), material: chromium-molybdenum alloy steel, the American grade is selected, which is equivalent to 40CRMO in China.

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

A193 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. A193 B7 steel is suitable for manufacturing large and medium-sized plastic molds and high-strength, high-temperature bolts and nuts that require certain strength and toughness.

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

Strictly speaking, A193, B8-2, A194-8 is not a material, but a grade. A193 B8-2 is the American standard.

Bolt grade, high mechanical property requirements, small specifications of tensile strength.

To reach more than 860MPa, the hardness should be below 35HRC. A194 8 is an American standard nut grade.

It belongs to the American standard stainless steel for high-temperature bolts, and the implementation standard: ASTM A193 A193M-2017

Due to the addition of MO, stainless steel has particularly good corrosion resistance, atmospheric corrosion resistance and high temperature strength, and can be used under harsh conditions; Excellent work hardening (non-magnetic); It has excellent high temperature strength, and is mainly used in seawater equipment, chemicals, dyes, papermaking, oxalic acid, fertilizer and other production equipment; Photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.

The chemical composition is shown below:

A194-8 is the performance grade of stainless steel nuts in the United States, which is used for high temperature and high pressure or low temperature and high pressure stainless steel nuts, which is one of the most commonly used stainless steel nuts, and we specialize in producing.

It belongs to the American standard of stainless steel for high-temperature bolts, and the executive standard: ASTM A193 A193M-2017

It is a general-purpose stainless steel, which is widely used in the production of equipment and parts that require good comprehensive properties (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel.

The chemical composition is shown below:

What is the material of bolt A193 B8 Bolt A193B8 is made of stainless steel Lingtang. A193 refers to the standard specification for alloy steel and stainless steel bolt materials for high-pressure and high-temperature operation. B8 refers to the hardness, and the chemical composition of B8 is the same as that of 304m.

The bolt performance Woodsan grade label consists of two numbers, which represent the nominal tensile strength value and yield ratio of the bolt material, respectively. Stainless steel bolts are divided into A1-50, A1-70, A1-80, A2-50, A2-70, A2-80, A3-50, A3-70, A3-80, A4-50, A4-70, A4-80, A4-80, A5-50 and the first letter and number represent the stainless steel group, and the second and third numbers represent the tensile strength of 1 10. The performance level of bolts for steel structure connection is divided into .,

More than 10 grades such as 9. Its intermediate and above bolts are made of low-carbon alloy steel or medium-carbon steel, and after heat treatment (quenching, tempering), they are generally called high-strength bolts, and others are generally called ordinary bolts. @2019

Bolt A193B8 is not made of rusty steel. A193 refers to the standard specification for alloy steel and stainless steel bolt materials for high-pressure and high-temperature operation. B8 refers to hardness.

The chemical composition of B8 is the same as that of 304m. The bolt performance grade is composed of two Latan part numbers, which represent the nominal tensile strength value and yield ratio of the bolt material. Stainless steel bolts are divided into A1-50, A1-70, A1-80, A2-50, A2-70, A2-80, A3-50, A3-70, A3-80, A4-50, A4-70, A4-80, A5-50, A5-70, A5-80, C1-50, C1-70, C1-110, C4-50, C4-70, C3-80, F1-45, F1-60.

The first letter and number represent the group of stainless steel, and the first number represents the tensile strength of 1 10. Bolt performance rating for steel structure connectionThere are more than 10 grades such as 9, and the intermediate and above bolts are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched and tempered), which are commonly known as high-strength bolts, and the rest are commonly referred to as ordinary bolts.

Summary. The basic explanation of stainless steel: according to the classification of the structure of the steel, it is generally divided into austenitic stainless steel, ferritic stainless steel and martensitic stainless steel, etc., according to the chemical composition of the steel, it is generally divided into chromium stainless steel, chromium-nickel stainless steel, chromium-manganese nitrogen stainless steel and ultra-low carbon stainless steel, according to the performance characteristics and use of steel, it is generally divided into nitric acid resistant stainless steel, sulfuric acid resistant stainless steel, pitting corrosion resistant stainless steel, stress corrosion resistant stainless steel and high-strength stainless steel, etc. Non-magnetic stainless steel, free-cutting stainless steel and superplastic stainless steel, etc.

What is the material of bolt A193 B8-2 A194-8?

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Hello dear, the clear answer I found for you is: bolt A193 B8-2 A194-8 is made of stainless steel.

The basic explanation of stainless steel: according to the classification of the structure of the steel, it is generally divided into austenitic stainless steel, ferritic stainless steel and martensitic stainless steel, etc., according to the chemical composition of the steel, it is generally divided into chromium stainless steel, chromium-nickel stainless steel, chromium-manganese nitrogen stainless steel and ultra-low carbon stainless steel, according to the performance characteristics and use of steel, it is generally divided into nitric acid resistant stainless steel, sulfuric acid resistant stainless steel, pitting corrosion resistant stainless steel, stress corrosion resistant stainless steel and high-strength stainless steel, etc. Non-magnetic stainless steel, free-cutting stainless steel and superplastic stainless steel, etc.

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 Pairang 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 the A193 GR B7 standard, and the chemical composition and mechanical properties of the A194 GR 2H nut should meet the requirements of the A194 GR 2H nut standard. 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.