Language 
English
Español
русский
Applications:
Oil and Gas pipeline
Heat exchangers
Boiler
Instrument industry
Pressure vessel
Product material
Alloys 304 (S30400) and 304L (S30403) stainless steels are variations of the 18 percent chromium – 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family.
It is common practice for 304L to be dual certified as 304 and 304L. The low carbon chemistry of 304L combined with an addition of nitrogen enables 304L to meet the mechanical properties of 304.
Alloy 304/304L resists atmospheric corrosion, as well as, moderately oxidizing and reducing environments. The alloy has excellent resistance to intergranular corrosion in the as-welded condition. Alloy 304/304L has excellent strength and toughness at cryogenic temperatures.
Alloy 304/304L is non-magnetic in the annealed condition, but can become slightly magnetic as a result of cold working or welding. It can be easily welded and processed by standard shop fabrication practices.
Chemical Composition & Mechanical properties as per ASTM A249
|
Grade |
CHEMICAL COMPOSITION(%) |
Mechanical Properties |
||||||||
|
C(max) |
Mn(max) |
P(max) |
S(max) |
Si(max) |
Cr |
Ni |
TS,Min(Mpa) |
YS, Min(Mpa) |
Elongation Longitudinal, min% |
|
|
TP304/S30400 |
0.08 |
2.00 |
0.045 |
0.03 |
1.00 |
18.0-20.0 |
8.0-11.0 |
515 |
205 |
35 |
|
TP304L/S30403 |
0.035 |
2.00 |
0.045 |
0.03 |
1.00 |
18.0-20.0 |
8.0-13.0 |
485 |
170 |
35 |
-
Toko pipe/tube products Forms:
Coiled welded tube with bright annealed and pickled.
Stainless steel U tube welded.
Stainless steel welded tube with annealed and pickled.
Stainless steel welded tube with bright annealed and polished.
-
Toko Typical Manufacturing standard:
ASTM A312 TP304, ASTM A312 TP304L
ASTM A213 TP304, ASTM A213 TP304L
ASTM A269 TP304, ASTM A269 TP304L
EN10216 1.4306 EN10217-1 1.4306
|
ASTM A249 Dimension tolerance for stainless steel welded tube |
|
||
|
O.D. mm |
O.D. tolerance(mm) |
Average Thickness Tolerance |
Min Wall thickness tolerance |
|
＜1"(25) |
-0.1,+0.11 |
-10%,+10% |
-0/+18% |
|
≥1" to 11/2" (25-40),incl |
-0.15,+0.15 |
-10%,+10% |
|
|
＞11/2" to 2" (40-50),excl |
-0.2,+0.2 |
-10%,+10% |
|
|
≥2" to 21/2"(50-65),excl |
-0.25,+0.25 |
-10%,+10% |
|
|
≥21/2" to 3"(65-75), excl |
-0.3,+0.3 |
-10%,+10% |
|
|
≥3" to 3"(75-100), incl |
-0.38,+0.38 |
-10%,+10% |
|
|
＞4"to71/2"(100-200), incl |
-0.38,+0.64 |
-10%,+10% |
|
|
＞71/2" to 0"(200-225), incl |
-0.38,+1.14 |
-10%,+10% |
|
