American standard: ASTM B381
Material: Gr1, Gr2, Gr3, Gr4, Gr5, Gr7, Gr9, Gr12
Delivery state: annealed state (M) hot working state (R) cold working state (Y) (annealed, supergenerated wave flaw detection)
Packing: carton or wooden case packing
Surface treatment: car light, chamfer
Specification: outer diameter * section height /mm
Surface quality: the surface roughness Ra of the two end surfaces should be no more than 3.2l mum (subject to ultrasonic inspection requirements), the surface roughness Ra of the inner and outer surfaces should be no more than 12.5m (Ra should be no more than 3.2m when ultrasonic inspection is needed on the outer circumference surface), and the chamfering radius should be 5-15mm.
The surface of the product should not be cracked, folded, heavy leather and other visible defects. Local surface defects are allowed to be removed by grinding. The cleaning depth shall not exceed the dimensional tolerance, and the * small allowable size shall be guaranteed. The ratio of cleaning depth to width shall not be greater than 1:6 on both ends, and the inner and outer sides shall not be greater than 1:10. External side grinding should be axial.
Surface finish: clean, dust-free, better acid - resistant service life.
Testing: mechanical properties, chemical composition testing, ultrasonic testing.
Performance: unique corrosion resistance, good ductility, light and strong, widely used in medicine, chemical industry, aerospace navigation, petroleum exploration and so on.
We insist on providing customers with the most competitive price series of products as the cornerstone of our sustainable development; On the basis of ensuring high quality products and services, relying on the effective control of the comprehensive cost of production and operation, to create more profit space for customers.