Is the material stainless steel A2 70 stainless steel 304?

A2-70 generally refers to the bolt grade.

A2: Material classification code, "A2" indicates the material group, that is, the second group of austenitic steel A2, generally 304 class of materials, A4 refers to 316L

50, 70 indicates the performance level of the product, and its number is the nominal tensile strength.

The 1 10a - represents austenitic stainless steel.

C - represents martensitic stainless steel, F - represents ferritic stainless steel. The groups are divided into A1 and A5, and the chemical composition of each group is different, as detailed in Appendix B in GB.

A2-70 means: austenitic steel, cold worked, the minimum tensile strength is 700MPa

You can read the Mechanical Design Handbook

Fourth Edition, Vol. 2, p5-72.

Wrong concept, A2-70 is not the code name for stainless steel materials. "A2-70" is a performance mark for stainless steel bolts, screws, studs and nuts.

Here, A2: material classification code, "A2" indicates the material group, that is, the second group of austenitic steel A2, generally 304 class of materials, A4 refers to 316L.

70" indicates the performance level of the product, and its number is 1 10 of the nominal tensile strength, that is, the performance tensile strength of this product is 700MPa.

No, stainless steel 304 is 0cr19ni9, the national standard SUS304 American standard. A2-70 is ordinary steel.

A2-70 is not necessarily stainless steel 304;

A2-70 is the bolt strength marking, where A2 is indicatedOrdinary sub-stable austenitic stainless steel。The most representative grade of common sub-stable austenitic stainless steel is 304 stainless steel, but it is notDefinitelyIt's 304. Similar grades are sometimes used.

The meaning of A2-70 bolt is the strength standard of 304 stainless steel screw, which reaches a performance level of 70. According to Chapter 8 of "Mechanical Design (Sixth Edition)" edited by Moose: A2 means material group, that is, the second group of austenitic steel, that is, stainless steel 304 material; 70 is the performance level of the product, and the tensile design value of A2-70 bolt is 700MPa

The difference between stainless steel A2-70, A4-70, A2-50, A4-50.

Hello dear, happy to help you. 1. Different chemical composition: A2 is the second group of austenitic steel, and A4 is the fourth group of austenitic steel. The chemical composition of A2 and A4 is different (A2-70 and A2-50 are both A2 groups and have the same chemical composition; A4-50 and A4-70 are both A4 groups, the chemical composition is the same), 2, the mechanical properties are different A2, the number 70 after A4, 50 represents the performance level, and the mechanical properties of A2 and A4 of different performance grades are different (A2-70 and A4-70 performance grades are 70, and the mechanical properties are the same; A2-50 and A4-50 performance grades are both 50, and the mechanical properties are the same,) 3. The processing methods are different, and the processing methods of austenitic steels of different performance grades are different.

Performance class 70 is cold-worked, while performance class 50 is specially processed.

"A2-70" is the performance mark of stainless steel bolts, screws, studs and nuts, "A2" before "-" indicates the material group, that is, the second group A2 of austenitic steel, and the number "70" after "-" indicates the performance level of the product, and its value is a minimum tensile strength of 700N mm2 (700MPa).

The meaning of bolt performance grade is the international standard, the same performance level of bolts, regardless of the difference in material and origin, its performance is the same, and only the performance grade can be selected in the design.

Kiss! Hello, happy to answer your <>

The difference between pro-304 stainless steel and 216 stainless steel is as follows: stainless steel 304 and 216 are different in material and have different corrosion resistance. 304 is an austenitic stainless steel with high chromium nickel, strong corrosion resistance, and will not rust when used.

216 is a ferritic metallographic structure, containing chromium alloy, containing low nickel and high manganese, with average corrosion resistance and rust. The thickness of the material is different, the grade is also different, first of all, it is the same stainless steel, but the thickness of the material is still different, so one of these two is 304 thick, the other is 216 thinner 216 stainless steel contains a large amount of manganese, the nature is relatively brittle, the toughness is also relatively poor, can not be used as food utensils or water supply appliances processing and production. It is the production of various cases, straps, case backs, high-quality materials, etc.

It is mainly used to make decorative pipes, industrial pipes, and some easy-to-stretch products. 304 stainless steel: contains more than 18% chromium and more than 8% nickel, high temperature resistance 800, has the characteristics of good processing performance and high toughness, and is widely used in industrial and furniture decoration industry and food and medical industry.

304 is corrosion-resistant, 216's is not corrosion-resistant! Hope mine can help you <>

Do you have any other questions?

A2-80 is the mechanical performance grade of austenitic non-high rust steel bolts, and cannot indicate the material.

The tensile strength of A2-80 is 800MPa (80kg mm2).

Similarly, A2-70 expresses a tensile strength of 700MPa (80kg mm2).

Tensile strength: The tensile strength of A2-80 is greater than that of A2-70.

304 stainless steel is better:

Stainless steel contains more nickel and chromium and has better corrosion resistance than stainless steel, while 201 stainless steel contains less nickel and chromium and has poor corrosion resistance.

Stainless steel has been specially treated and has strong toughness, while stainless steel has insufficient toughness, and it is easy to crack when stretched.

Stainless steel mainly contains nickel and chromium, which is safe and environmentally friendly, and is an edible material Stainless steel has a high manganese content and is harmful to the human nervous system.

Stainless steel is mostly used in anti-corrosion construction, while it has good acid and alkali resistance, which is suitable for decoration and industry.

04 Stainless Steel Features:

304 stainless steel contains a large amount of nickel and chromium, good corrosion resistance, high toughness, **high! It is used for anti-corrosion buildings.

Stainless steel features:

Stainless steel contains less nickel and chromium, weak corrosion resistance, more manganese, good acid and alkalinity, **low! It is mostly used for decorative pipes and industrial pipes.

Summary: 304 stainless steel is better than stainless steel, because 304 stainless steel contains more nickel and chromium, strong corrosion resistance, good toughness and long service life.

are all performance marks for stainless steel bolts, screws, studs and nuts. Take A2-70 as an example: "A2" before - indicates the material group, that is, the second group of austenitic steel A2 (A1 is the first group)," and the number after "70" indicates the performance level of the product, and its number is 1 10 of the nominal tensile strength, that is, the performance tensile strength of this product is 700 N mm2.

A1 is austenitic stainless steel, numbered 201, A2 is austenitic stainless steel, numbered 304, A3 is austenitic stainless steel, marked with 316, -70 is the strength grade, and the strength grade is general.

A2-70 is 304 with a tensile strength of 700 Newtons square mm.

What do you mean? Be clear.

There is no difference between the two.

The raw materials, uses, and characteristics of the two are the same, so 304-2B stainless steel refers to 304-ba stainless steel. 304-is a general model of stainless steel; i.e. 18-8 stainless steel. GB grades are widely used materials.

Corrosion resistance, heat resistance, good mechanical properties, deep drawing, bending and other normal temperature processing performance is good, after heat treatment, it will not cover the lead and not harden, it can withstand general rust in the building, it can resist the corrosion of food processing media (but corrosion may occur in the high-temperature state containing concentrated acid and chloride components), and it can resist organic compounds, dyes and a wide variety of inorganic compounds.

304L stainless steel (low carbon), good nitric acid resistance, and durable sulfuric acid at medium temperature and concentration, widely used as liquid gas storage tanks, used as cryogenic equipment (304N), appliances and other consumer products, kitchen equipment, hospital equipment, transportation tools, wastewater treatment devices.