hemos obtenido ISO 9001, ISO 14001, ISO 45001, CE, certificación de calificación crediticia de nivel AAA, etc.
ASTM A554 Standard Specification for Welded Stainless Steel Mechnical Tubing. This specification covers welded austenitic,ferritic,and austenitic-ferritic duplex stainless steel mechanical tubing intended for use in ornamental,structural,exhaust,and other applications where appearance,mechanical properties,or corrosion resistance is needed.
This specification covers as-welded or cold-reduced mechanical tubing in sizes to 16 in.(406.4mm)outside dimension,and in wall thicknesses 0.020in.(0.51mm) and over.
Chemical Composition
UNS# |
Grade |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
|
Austentic |
|||||||
S31655 |
MT-301 |
0.150 |
2.00 |
0.045 |
0.030 |
1.00 |
6.0-8.0 |
16.0-18.0 |
MT-302 |
0.150 |
2.00 |
0.045 |
0.030 |
1.00 |
8.0-10.0 |
17.0-19.0 |
|
MT-304 |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
8.0-11.0 |
18-20.0 |
|
MT-304L |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
8.0-13.0 |
18.0-20.0 |
|
MT-305 |
0.120 |
2.00 |
0.045 |
0.030 |
1.00 |
10.0-13.0 |
17.0-19.0 |
|
MT-309S |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
12.0-15.0 |
22.0-24.0 |
|
MT-309S-Cb |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
12.0-15.0 |
22.0-24.0 |
|
MT-310S |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
19.0-22.0 |
24.0-26.0 |
|
MT-316 |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
10.0-14.0 |
16.0-18.0 |
|
MT-316L |
0.035 |
2.00 |
0.045 |
0.030 |
1.00 |
10.0-15.0 |
16.0-18.0 |
|
MT-317 |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
11.0-14.0 |
18.0-20.0 |
|
MT-321 |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
9.0-13.0 |
17.0-20.0 |
|
MT-330 |
0.150 |
2.00 |
0.045 |
0.030 |
1.00 |
33.0-36.0 |
14.0-16.0 |
|
MT-347 |
0.080 |
2.00 |
0.045 |
0.030 |
1.00 |
9.0-13.0 |
17.0-20.0 |
|
|
Ferrtic |
|||||||
|
MT-429 |
0.120 |
1.00 |
0.045 |
0.030 |
1.00 |
0.50max |
14.0-16.0 |
MT-430 |
0.120 |
1.00 |
0.045 |
0.030 |
1.00 |
0.50max |
16.0-18.0 |
|
MT-430T |
0.100 |
1.00 |
0.045 |
0.030 |
1.00 |
0.075max |
16.0-19.5 |
Mechanical Properties
Grade |
Tensile
Strength |
Yield
Strength |
Elongation in 2in.(min,%) |
||
MT429 and MT430 |
60 |
414 |
35 |
241 |
20 |
MT-430-Ti |
60 |
414 |
30 |
207 |
20 |
MT 304L&MT316L |
70 |
483 |
25 |
172 |
35 |
S31655 |
92 |
635 |
45 |
310 |
35 |
All other austentic steels |
75 |
517 |
30 |
207 |
35 |
MT 409 |
55 |
379 |
30 |
207 |
20 |
All other ferritic |
60 |
414 |
35 |
241 |
20 |
S31803 |
90 |
620 |
65 |
450 |
25 |
S32003 |
100 |
690 |
70 |
485 |
25 |
S32202 |
94 |
650 |
65 |
450 |
30 |
S32205 |
95 |
655 |
65 |
450 |
25 |
S32304 |
87 |
600 |
58 |
400 |
25 |
S32550 |
110 |
760 |
80 |
550 |
15 |
S32750 |
116 |
795 |
80 |
550 |
15 |
S32760 |
108 |
750 |
80 |
550 |
25 |
S81921 |
90 |
620 |
65 |
450 |
25 |
S82011 |
101 |
700 |
75 |
515 |
30 |