What material is A4 70? What material is A4 70?

A4-70 is made of 316 class I stainless steel.

A4 is a 316 class of stainless steel, and the "70" at the back refers to the tensile strength of stainless steel.

Performance Rating. SUS 316 (0Cr18Ni12Mo2) and SUS 316L (00Cr17Ni14Mo2), which is often referred to as A4, are mainly used for the manufacture of stainless steel bolts, screws, washers and nuts with high corrosion resistance, and the strength grade is 70 for general bolts, and it can also reach 80 for high strength.

Stainless steel bolts: The strength grade mark of stainless steel is separated by a "-" middle bar, the left side represents the material, and the right side represents the tensile strength, for example: A2-70 and A4-70;

Some fastener industry will be 302HQ and 304 abbreviation: A2; 316 and 316L (Stainless steel bolts with a lower carbon C content can be increased.)"l"logo) is called A4.

The grade of stainless steel bolts is divided into materials, mainly austenite.

A1, A2, A4, martensite.

and ferrite C1, C2, C4, which are expressed in such a way as A2-70, and the "- front and back indicate the bolt material and strength grade, respectively.

1 strength rating, a stands for quot; Austenite quot; 2 represents the second material (in fact, 2 refers to 304), and -70 represents the strength level is 700mpa

The common materials are A2 and A4, which are 304 and 316 respectively, but as long as the mechanical properties can be guaranteed, the chemical composition can be different. Common grades are:

A2-60 (basically no more).

A2-70A2-80 (rare).

a4-70a4-80

A4-90 (it seems that it cannot be produced in China at present).

What are ordinary carbon steel screws labeled, A4-70 and A4-80 are no different in the material itself?

is the yield strength.

A1, A2, A4 for ; 45, 50, 60, 70, 80 represent 1 10 of the minimum tensile strength of the fastener

2, A4 group belongs to austenitic stainless steel, is developed for boiling sulfuric acid, so named acid-resistant steel, belongs to the sub-stable acid-resistant steel, typical representatives and A4-80 behind the 70 and 80 represent the minimum tensile strength of fasteners 1 10, A4-70 and A4-80 in the material itself is no different, because it is austenitic stainless steel, so can not be improved by means of heat treatment, the improvement of its tensile strength is through the dislocation barrier after deformation (commonly known as cold hardening), A4-70 bolts on the market are more circulating, A4-80 is rare, 3

A4-70 is made of 316 class I stainless steel.

A4 is a class of 316 stainless steel, and the "70" at the back refers to the tensile strength performance and good grade of stainless steel.

SUS 316 (0Cr18Ni12Mo2) and SUS 316L (00Cr17Ni14Mo2), which is often referred to as A4, are mainly used for the manufacture of stainless steel bolts, screws, washers and nuts with high corrosion resistance, and the strength grade is 70 for general bolts, and it can also reach 80 for high strength.

Stainless steel bolts: The strength grade mark of stainless steel is separated by a "-" middle bar, the left side represents the material, and the right side represents the tensile strength, for example: A2-70 and A4-70; Calendar.

Some fastener industry will be 302HQ and 304 abbreviation: A2; 316 and 316L (Stainless steel bolts with a lower carbon C content can be increased.)"l"logo) is called A4.

The grade of stainless steel bolts is divided into A1, A2, A4, martensitic and ferrite C1, C2, C4, and its expression method is such as A2-70, "- before and after indicating the bolt material and strength grade.

<>A4-70 is made of stainless steel. A4-70 needs to be maintained on a daily basis, if it is not maintained, this type of imitation steel will corrode very quickly, and will be more serious than other types of ordinary steel. A4-70 is mainly used to make a pair of orange pie tool steel, A4-70 This steel can also be used to make knives, but it is usually shorter, not because it can't be made into long knives just now.

Rather, it is because considering the practicality of the knife, it is useless to make the knife too long, and it is not very convenient to use, so in general, the knife basically does not exceed 25 cm.

1. A4-70 is made of 316 class of stainless steel.

2. A4 is a class of 316 stainless steel, and the "70" behind refers to the tensile strength performance grade of stainless spike steel.

3. SUS 316 (0Cr18Ni12Mo2), SUS 316L (00Cr17Ni14Mo2), that is, A4 is often used for the manufacture of stainless steel bolts, screws, washers and nuts with high corrosion resistance.

4. Stainless steel bolts: The strength grade mark of stainless steel is separated by the "-" middle bar, the left side represents the material, and the right side represents the tensile strength, such as: A2-70 and A4-70;

5. Some fastener industries refer to 302HQ and 304 as A2; 316 and 316L (stainless steel bolts with less carbon C, L can be marked) are called A4.

6. The grade of stainless steel bolts is divided into materials mainly divided into austenitic A1, A2, A4, martensitic and ferritic C1, C2, and C4, and its representation method is such as A2-70, "- before and after indicating the bolt material and strength grade.

<>A4-70 is made of stainless steel. A4-70 needs to be maintained on a daily basis, and if it is not maintained, this type of steel will corrode quickly and will be more severe than other types of ordinary steel. A4-70 is mainly used to make some tool steel, A4-70 this steel can also be used as a knife, but it is usually shorter, not because it can't be a long knife just now, but because considering the practicality of the knife, it is useless to make the knife too long, and it is not very convenient to use, so Sobi generally said in the afterlife that the knife basically does not exceed 25 cm.

<> stainless steel. It has a wide variety of properties, such as corrosion resistance and heat resistance. The corrosion resistance is better than that of 304 stainless steel, and it also has excellent corrosion resistance in the production of pulp and paper.

At the same time, the material is resistant to ocean erosion and the erosion of the aggressive industrial atmosphere. In addition, it has excellent oxidation resistance when used intermittently at temperatures below 871°C and at temperatures above 927°C. It cannot be used continuously in the range of 427°C-857°C, but it has excellent heat resistance when used continuously outside of this temperature range.