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| Item | Stainless Steel Seamless Tube/Pipe | |
| Standard | ASTM A213,A312,ASTM A269,ASTM A778,ASTM A789,DIN 17456, DIN17457,DIN 17459,JIS G3459,JIS G3463,GOST9941,EN10216, BS3605,GB13296 | |
| Material | 200 Series: 201,202 300 Series: 301,304,304L,304H,316,316L,316Ti,317L,321,309s,310s 400 Series: 403,405,409L,410,416,420,431, 434 Duplex Steel: 904L,2205,2507,2101,2520,2304 |
|
| Surface | Polishing,annealing,pickling,bright | |
| Shape | Round Pipe/Tube, Round Rod(Bar), Rectangular Pipe & Square Pipe | |
| Type | Hot rolled and cold rolle | |
| Application | Hydraulic Tubes & Instrumentation Tubes | |
| size | Length | 5.8m/6m/ 11.8m/ 12m or Customized |
| Outer diameter | 6mm-1600mm | |
| Delivery time | Within 5-30 days after receiving the prepaid | |
| Package | Standard export seaworthy package,or as required | |
This specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. ASTM A312 316L properties and ASTM A312 316L chemical composition are listed in the ASTM A312 specification.
OD: NPS 1/8" to 30"
WT: SCH 5S, 10S, 40S, 80S
Length: 5.8M, 6M, 11.8M, 12M, or any other economical length
Manufacturing Process: Seamless and Welded.
Grade: TP304, TP304L, TP316, TP316L, TP309S, TP310S, TP317, TP317L, TP321, TP347, TP348, 904L
6% Mo (UNS S31254, UNS N08367, UNS N08926), 7% Mo (UNS S32654),
4% Si (UNS S30600), 5% Si (UNS S30601), 5% Si (UNS S32615), 6% Si (UNS S38815)
Table 1 con't Nominal composition of nickel-containing alloys most are used in sulphuric acid systems | |||||||||
Nominal composition, % |
ASTM Spec. b |
||||||||
|
Alloy |
UNS numbera |
Ni |
C |
Cr |
Mo |
Cu |
Fe |
Plate |
Seamless tube and pipe |
Austenitic stainless steels | |||||||||
304 |
S30400 |
8 |
0.04 |
18 |
- |
- |
Bal |
A240 |
A312 |
304L |
S30403 |
8 |
0.02 |
18 |
- |
- |
Bal |
A240 |
A312 |
316 |
S31600 |
10 |
0.04 |
16.5 |
2.1 |
- |
Bal |
A240 |
A312 |
316L |
S31603 |
10 |
0.02 |
16.5 |
2.1 |
- |
Bal |
A240 |
A312 |
CF8M |
J92900 |
10 |
0.04 |
19 |
2.3 |
- |
Bal |
- |
- |
310 |
S31000 |
21 |
0.05 |
25 |
- |
- |
Bal |
A240 |
A312 |
20 |
N08020 |
33 |
0.02 |
19.5 |
2.2 |
3.2 |
Bal |
A240 |
B729 |
CN7M |
N08007 |
29 |
0.04 |
20 |
2.3 |
3.5 |
Bal |
- |
- |
904L |
N08904 |
24 |
0.01 |
20 |
4.5 |
1.5 |
Bal |
A240 |
A312 |
6%Moc |
S31254 |
18 |
0.01 |
20 |
6.2 |
0.7 |
Bal |
A240 |
A312 |
6%Moc |
N08367 |
24 |
0.01 |
21 |
6.2 |
- |
Bal |
A240 |
A312 |
6%Moc |
N08926 |
25 |
0.01 |
20.5 |
6.2 |
1 |
Bal |
A240 |
A312 |
7%Mo |
S32654 |
22 |
0.01 |
24 |
7.3 |
0.5 |
Bal |
A240 |
A312 |
4% Sid |
S30600 |
15 |
0.01 |
17.5 |
0.1 |
0.3 |
Bal |
A240 |
A312 |
5% Sid |
S30601 |
17.5 |
0.01 |
17.5 |
0.1 |
0.2 |
Bal |
A240 |
A312 |
5% Sid |
S32615 |
20 |
0.04 |
18 |
1 |
2 |
Bal |
A240 |
A312 |
6% Sid |
S38815 |
15 |
0.02 |
14 |
1 |
1 |
Bal |
A240 |
A312 |
Duplex stainless steel | |||||||||
2205 |
S32205 |
5 |
0.02 |
22 |
3.2 |
- |
Bal |
A240 |
A790 |
255 |
S32550 |
5.5 |
0.02 |
25 |
3.5 |
2 |
Bal |
A240 |
A790 |
7-Mo Plus |
S32950 |
4 |
0.03 |
27.5 |
2 |
- |
Bal |
A240 |
A790 |
CD4MCu |
J93370 |
5 |
0.2 |
25 |
2 |
3 |
Bal |
- |
- |
a - UNS numbers beginning with an “N” indicate a nickel alloy, but the definition of a nickel alloy is different than that used by ASTM.
b - in ASTM specifications, most nickel alloys fall into the “B” specifications. However, due to a redefinition of a nickel alloy, a few alloys such as 800 and 20 are being reclassified as stainless steels and will be included in the “A” specifications. That work is still in progress.
c - the 6%Mo alloys are a series of stainless steels, many of which are proprietary, all with roughly 6%Mo content and roughly equivalent in performance.
d - the austenitic stainless steels with high Si are proprietary and were developed from nitric acid grades for use in strong sulphuric acid.
The most common grades are TP 304 and TP 316. Grades TP 304H, TP 304N, TP316H, TP316N, TP321H, TP347H and TP348H are modifications of Grades TP 304, TP 316, TP 321.Grades TP 347 and TP 348 and are intended for high-temperature service.
Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP309Cb, TP309S, TP310Cb, TP310S, TP316, TP321, TP347, and TP348, and are intended for service at temperatures where creep and stress rupture properties are important.
These pipes are used in the process, petrochemical, pharmaceutical, and food industries.
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