Keywords:
ferritic/austenitic stainless steel
seamless steel pipe
steel pipe
welded steel pipe
Abstract
The specification covers seamless and straight-seam welded ferritic/austenitic steel pipe for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation. Heat analysis [...]

Product Description
1) Commodity: Seamless austenitic stainless steel pipes
2) Process method: Cold drawn/cold pilgered
3) Delivery conditions: Annealed and pickled
4) Material: TP304/304L/304H/304LN, TP310/S, TP316/316L, TP317L, TP321/321H, TP347/TP347H, duplex s31803, 2205, and we also produce other specification according to the customers’ requirements.
5) Standards: ASTM (ASME) SA/A213/M,
6) Size: 6-630mm OD, 1mm thickness min.
7) Length: according to customer’s requirements.
[...]

The chromium content in stainless steel alloys is what generally prevents corrosion. Pure iron, the primary element of stainless steel, is extracted from its natural state as iron ore, it is unstable by itself, and naturally wants to corrode (rust). The chromium helps to procrastinate nature’s attempts to combine the pure iron with oxygen and [...]

300 Series—austenitic chromium-nickel alloys
 Type 301—highly ductile, for formed products. Also hardens rapidly during mechanical working. Good weldability. Better wear resistance and fatigue strength than 304.
Type 302—same corrosion resistance as 304, with slightly higher strength due to additional carbon.
Type 303—free machining version of 304 via addition of sulfur and phosphorus. Also referred to as “A1″ in [...]

According to different production methods, seamless steel pipe can be divided into pipe, cold-rolled pipe, extruded pipe, etc.
Seamless steel pipes are produced in auto-pipe mill generally. Cut the solid tube blanks, set the centering on the surface of the tube blanks, heat the tubes by heating furnace, and punch holes in punchers. Tube blanks becomes [...]

 MECHANICAL COMPOSITION

Grade Designation
Chemical Composition
Per Cent Nearest
Environment Specification

AISI
C Max
Mn Max
P Max
S Max
SI Max
Cr
N
MO
Other element
I.S
En

201
0.15
5.50/7.50
0.06
0.03
1
16.0/18.0
3.5/5.5
-
N-25 Max
I.S
-

202
0.15
7.50/10.0
0.06
0.03
1
17.0/19.0
4.0/6.0
-
N-25 Max
-
-

301
0.15
2.0 max
0.045
0.03
1
16.0/18.0
6.0/8.0
-
-
10Cr17Ni7
-

302
0.15
2
0.045
0.03
1
17.0/19.0
8.0/10.0
-
-
07Cr18Ni9
En-58A

303
0.15
2
0.045
-
1
17.0/19.0
8.0/10.0
-
-
15Cr18Ni9
En-58M

304
0.08
2
0.045
0.03
1
18.0/20.0
8.0/10.0
-
-
04Cr18Ni10
En-58E

304L
0.03
2
0.045
0.03
1
18.0/20.0
8.0/10.0
-
-
02Cr18Ni11
-

308
0.08
2
0.04
0.03
1
10.0/21.0
10.0/12.0
-
-
-
-

309
0.2
2
0.045
0.03
1
22.0/24.0
12.0/15.0
-
-
20Cr24Ni12
-

309S
0.08
2.0 max
0.045
0.03
1.5
22.0/24.0
12.0/15.0
-
-
-
-

310
0.25
2
0.045
0.03
1.5 to 3
24.0/26.0
19.0/22.0
-
-
10Cr25Ni12
-

310S
0.08
2
0.045
0.03
1
24.0/26.0
19.0/22.0
-
-
-
-

314
0.25
2
0.04
0.03
1
25.0/26.0
19.0/22.0
-
-
-
-

316
0.08
2
0.045
0.03
1
16.0/18.0
10.0/14.0
2.0/3.0
-
04Cr17Ni12M02
En-58H

316L
0.03
2
0.045
0.03
1
16.0/18.0
10.0/14.0
2.0/3.0
-
03Cr17Ni12M03
-

317
0.08
2
0.045
0.03
1
18.0/20.0
11.0/15.0
3.0/4.0
-
04Cr17Ni12M04
-

317L
0.03
2
0.045
0.03
1
18.0/20.0
11.0/15.0
3.0/4.0
-
Tly5cmin
-

316TI
0.08
2
0.045
0.03
1
16.0/18.0
10.0/14.0
2.0/3.0
Ti5 x Cmin
-
-

321
0.08
2
0.045
0.03
1
17.0/19.0
9.0/12.0
-
Ti5 x Cmin
04Cr18Ni10Ti20
En-58C

347
0.08
2
0.045
0.03
1
17.0/19.0
9.0/12.0
-
Nb/Ta10 x Cmin
04Cr18Ni10Nb-40
En-58C

430
0.12
1
0.04
0.03
0.75
14.0/18.0
0.6
-
-
07Cr17
En-60

446
0.2
1.50 max
0.04
0.03
1
23.0/27.0
0.60 Max
-
N-25 Max
-
-

403
0.15
1
0.04
0.03
0.5
11.5/13.5
0.6
-
-
-
-

410
0.15
1
0.04
0.03
1
11.5/13.5
0.6
-
-
12Cr13
En-58A

410S
0.08
1
0.04
0.03
1
11.5/13.5
0.60 Max
-
-
-
-

414
0.15
1.0 max
0.04
0.03
1
11.5/13.5
1.25/2.50
0.75 Max
-
-
-

420
Over.15
1
0.04
0.03
1
12.0/14.0
0.6
-
-
22Cr13
En-56C&D

431
0.2
1.0 max
0.04
0.03
1
15.0/17.0
1.25/2.50
0.75 Max
-
15Cr16Ni2
En-57

440 A
0.60/0.70
1
0.04
0.03
1
16.0/18.0
-
-
-
-
-

440B
0.75
1
0.04
0.03
1
16.0/18.0
-
0.75 Max
-
-
-

-
0.95
-
-
-
-
16.0/18.0
-
-
-
-
-

440 C
0.95
1
0.03
0.03
1
23.0/27.0
-
-
-
No25 Max
-

-
1.2
-
-
-
-
-
-
-
-
-
-

446
0.2
1.5
0.03
0.03
1
-
-
-
-
-
-

The cleaner stainless steel can be kept while in storage, being processed or during use, the greater the assurance of optimum corrosion resistance. Some tips on the care of stainless steel are listed below:
1) Use paper or other protective wrapping on the surface of the stainless steel until processing is complete.
2) Handle stainless steel with [...]

General Precautions
 In selecting cleaning practices, consider the possibility of scratching and the potential for post-cleaning corrosion caused by incompletely removed cleaners. Scratching can occur on a bright mirror finish by
cleaners that contain hard abrasives, or even by “grit” in wash water. This is usually not a problem on dull finishes, or those surfaces finished with [...]