A2-60, A2-70, A2-80 Austenitic stainless steel round bars and hexagonal bar
A1, A2, A4 represent 302, 304, 316; 45, 50, 60, 70, 80 represent 1/10 of the minimum tensile strength of fasteners. A4 is austenitic stainless steel, developed for boiling sulfuric acid, Therefore, the name is acid-resistant steel, which belongs to metastable acid-resistant steel, typically on behalf of SUS316.
A represents “austenite”, 2 represents the second material (in fact, 2 refers to 304), and -70 represents the strength level is 700 MPa. Common materials are A2 and A4, which are 304 and 316 respectively, but as long as the mechanics can be guaranteed Performance, chemical composition can come in and out. Common grades are:
A2-60
A2-70
A2-80
A4-70
A4-80
A4-90
A1, A2, A4 represent 302, 304, 316; 45, 50, 60, 70, 80 represent 1/10 of the minimum tensile strength of the fastener.
The A4 is an austenitic stainless steel that was developed for boiling sulfuric acid. Therefore, the acid-resistant steel is named as a metastable acid-resistant steel, typically SUS316. The 70 and 80 behind the A4-70 and A4-80 represent 1/10 of the minimum tensile strength of the fastener. A4-70 and A4-80 are no different from the material itself. Since they are austenitic stainless steels bar, they cannot be treated by heat treatment. The means to improve the tensile strength, the increase in tensile strength is through the deformation of the dislocation barrier (commonly known as cold hardening), A4-70 bolts on the market than the circulation, A4-80 rare.
Post time: Jun-05-2018