hemos obtenido ISO 9001, ISO 14001, ISO 45001, CE, certificación de calificación crediticia de nivel AAA, etc.
ASTM A381 Standard Specification for Metal-Arc-Welded Steel Pipe for Use With High-Pressure Transmission Systems.This specification covers straight seam, double-submerged-arc-welded steel pipe suitable for high-pressure service, 16 in. (406 mm) and larger in outside diameter, with wall thicknesses from 5 ⁄ 16 to 1 1 ⁄ 2 in. (7.9 to 38mm). The pipe is intended for fabrication of fittings and accessories for compressor or pump-station piping. Pipe ordered to this specif i cation shall be suitable for bending,flanging (vastoning), corrugating, and similar operations.
Chemical Composition
|
Element |
Compostion,%,max |
|
|
Ladle |
Check |
|
|
C |
0.26 |
0.3 |
|
Mn |
1.4 |
1.5 |
|
P |
0.025 |
0.03 |
|
S |
0.025 |
0.025 |
Mechanical Properties
|
Class |
Yield Strength |
Tensile Strength |
Elongation in 2in.(50.8mm) |
|
min,Mpa |
min,Mpa |
min,% |
|
|
Y35 |
240 |
415 |
26 |
|
Y42 |
290 |
415 |
25 |
|
Y46 |
316 |
435 |
23 |
|
Y48 |
330 |
430 |
21 |
|
Y50 |
345 |
440 |
21 |
|
Y52 |
360 |
455 |
20 |
|
Y56 |
385 |
490 |
20 |
|
Y60 |
415 |
515 |
20 |
|
Y65 |
450 |
535 |
20 |
