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seamless stainless steel pipe

Seamless stainless steel pipe is a type of economical mix section steel which is an essential product in iron and steel industry. Stainless steel tube is broadly applied in decorative and industrial line, for instance, many people use it to create stair handrail, protective home windows, railings and furniture etc. The most popular two materials are 201 and 304, which is paid for 8Percent-16% from the total steel and it has an array of programs. Anson steel is a professional stainless steel pipe manufacturer with many production and supplying experiences to meet consumers’ different requirements.

Seamless Stainless Steel Pipe

seamless stainless steel pipe

Because of hollow section, the seamless stainless pipe is appropriate for moving pipeline of liquid, gas, and solid In comparison with similar weight of round steel. Moreover, seamless stainless steel pipe has large section coefficient and enormous bending torsional strength, so it is a significant material for a myriad of mechanical and architectural structure. Underneath the equal weight condition, the dwelling and components created using stainless tube have lager section modulus compared to solid parts.  Most importantly, the oil drilling, refining and transportation have bigger demand. In addition, stainless steel tube possess a wide scope in geological drilling, chemical industry, building industry, aircraft and automobile manufacture as well as boiler, medical equipment, furniture and bicycle production etc. With growth and development of new technology in rocket, missile and aerospace industry, stainless pipe has grown to be increasingly more essential in defense industry, science and economic development.

Main Grade of Stainless Steel Pipe and Applications

Grades Applications
301 It is used for forming products with good ductility and good weldability. Abrasion resistance and fatigue strength is better than that of304 stainless steel. It can harden rapidly by mechanical processing.
302 The corrosion resistance of 302 is the same with 304. Due to high carbon content, intensity is better.
303 It is easier to cut processing than 304 by adding a little sulfur and phosphorus.
304 It is18/8 stainless steel. GB brand is 0Cr18Ni9.
316 After 304, it is the second to get widest applications. It is mainly used to food industry, pharmaceutical industry and surgical equipment. Adding molybdenum elements make 316 stainless steel gets a special structure of corrosion resistant. Because it has much better ability to resist chloride corrosion, it is often used as marine steel. SS316 is usually used for nuclear fuel recycling equipment.
400 400 series Ferrite and martensite stainless steel
408 Weak corrosion resistance and good heat resistance. Cr: 11%;Ni:8%
409 The cheapest model (), it is usually used as auto vent pipe and is a ferritic stainless steel (chrome steel).
410 Martensite stainless steel with good abrasion resistance and weak corrosion resistance.
416 Adding sulfur can improve the processing properties of material.
420 Rj martensitic steel which is similar to brinell high chromium steel. It is used as surgical tools.
430 Ferritic stainless steel with good formability and poor temperature resistance and corrosion resistance. It is mainly used to decorate.
440 High strength cutting steel with high carbon. After appropriate heat treatment, it can obtain higher yield strength, the hardness can reach 58 HRC. It belongs to the most hardest stainless steel. The most common example is razor blade. Common models:440A, 440B, 440C.
500 500 series-heat resistant chromium alloy steel
600 600 series-martensitic precipitation hardening stainles

Based on different programs, stainless pipe is split into oil well pipe (casing pipe, oil pipe and drill pipe), line pipe, boiler pipe, mechanical structural pipe, hydraulic prop tube, vessel tube, geological tube, chemical pipe (ruthless fertilizer pipe, oil cracking pipe) and marine pipe etc.

Table 2 Chemical Compositions of Martensite, Ferrite, Austenite and Diphasic Stainless Steel

Grade Mark Chemical Compositions(%)
C Cr Ni Mn P S Mo Si Cu N Others
201 1Cr17Mn
6Ni5N
≤0.15 16.00-
18.00
3.50-
5.50
5.50-
7.50
≤0.060 ≤0.03 - ≤1.00 - ≤0.25 -
201L 03Cr17Mn
6Ni5N
≤0.03 16.00-
18.00
3.50-
5.50
5.50-
7.50
≤0.060 ≤0.03   ≤1.00   ≤0.25  
202 1Cr18Mn
8Ni5N
≤0.15 17.00-
19.00
4.00-
6.00
7.50-
10.00
≤0.060 ≤0.03   ≤1.00 - ≤0.25 -
204 03Cr16Mn
8Ni2N
≤0.03 15.00-
17.00
1.50-
3.50
7.00-
9.00
          0.15-
0.30
 
China 1Cr18Mn10Ni
5Mo3N
≤0.10 17.00-
19.00
4.00-
6.00
8.50-
12.00
    2.8-
3.5
    0.20-
0.30
 
Russia 2Cr13Mn
9Ni4
0.15-
0.25
12.00-
14.00
3.70-
5.00
8.00-
10.00
             
China 2Cr15Mn
15Ni2N
0.15-
0.25
14.00-
16.00
1.50-
3.00
14.00-
16.00
          0.15-
0.30
 
  1Cr18Mn
10Ni5Mo3N
≤0.15 17.00-
19.00
4.00-
6.00
8.50-
12.00
≤0.060 ≤0.03 2.8-
3.5
≤1.00 - 0.20-
0.30
-
301 1Cr17Ni7 ≤0.15 16.00-
18.00
6.00-
8.00
≤2.00 ≤0.065 ≤0.03 - ≤1.00 - - -
302 1Cr18Ni9 ≤0.15 17.00-
19.00
8.00-
10.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - - -
303 Y1Cr18Ni9 ≤0.15 17.00-
19.00
8.00-
10.00
≤2.00 ≤0.20 ≤0.03 1) ≤1.00 - - -
303se Y1Cr18Ni
9Se
≤0.15 17.00-
19.00
8.00-
10.00
≤2.00 ≤0.20 ≤0.03 - ≤1.00 - - Se≥0.15
304 0Cr18Ni9 ≤0.07 17.00-
19.00
8.00-
10.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - - -
304L 00Cr19Ni10 ≤0.03 18.00-
20.00  
8.00-
10.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - - -
304N1 0Cr19Ni9N ≤0.08 18.00-
20.00  
7.00-
10.50
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - 0.10-
0.25
-
304N2 0Cr18Ni
10NbN
≤0.08 18.00-
20.00  
7.00-
10.50
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - 0.15-
0.30
Nb≤0.15
304LN 00Cr18Ni
10N
≤0.03 17.00-
19.00
8.50-
11.50
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - 0.12-
0.22
-
305 1Cr18Ni12 ≤0.12 17.00-
19.00
10.50-
13.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 -   -
309S 0Cr23Ni13 ≤0.08 22.00-
24.00
12.00-
15.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 -   -
310S 0Cr25Ni20 ≤0.08 24.00-
26.00
19.00-
22.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - - -
316 0Cr17Ni
12Mo2
≤0.08 16.00-
18.50
10.00-
14.00
≤2.00 ≤0.035 ≤0.03 2.00-
3.00
≤1.00 - - -
  1Cr18Ni
12Mo2Ti6)
≤0.12 16.00-
19.00
10.00-
14.00
≤2.00 ≤0.035 ≤0.03 1.80-
2.50
≤1.00 - - Ti5
(C%-0.02)~
0.08
  0Cr18Ni
12Mo2Ti
≤0.08 16.00-
19.00
10.00-
14.00
≤2.00 ≤0.035 ≤0.03 1.80-
2.50
≤1.00 - - Ti5*C%-
0.70
316L 00Cr17Ni
14Mo2
≤0.03 16.00-
18.00
12.00-
15.00
≤2.00 ≤0.035 ≤0.03 2.00-
3.00
≤1.00 - - -
316N 0Cr17Ni
12Mo2N
≤0.08 16.00-
18.00
10.00-
14.00
≤2.00 ≤0.035 ≤0.03 2.00-
3.00
≤1.00 - - -
316N 00Cr17Ni
13Mo2N
≤0.03 16.00-
18.50
10.50-
14.50
≤2.00 ≤0.035 ≤0.03 2.00-
3.00
≤1.00 - - -
316J1 0Cr18Ni
12Mo2Cu2
≤0.08 17.00-
19.00
10.50-
14.50
≤2.00 ≤0.035 ≤0.03 1.20-
2.75
≤1.00 1.00-
2.50
- -
316J1L 00Cr18Ni
14Mo2Cu2
≤0.03 17.00-
19.00
12.00-
16.00
≤2.00 ≤0.035 ≤0.03 1.20-
2.75
≤1.00 1.00-
2.50
- -
317 0Cr19Ni
13Mo3
≤0.12 18.00-
20.00
11.00-
15.00
≤2.00 ≤0.035 ≤0.03 3.00-
4.00
≤1.00 - - -
317L 00Cr19Ni
13Mo3
≤0.08 18.00-
20.00
11.00-
15.00
≤2.00 ≤0.035 ≤0.03 3.00-
4.00
≤1.00 - - -
  1Cr18Ni
12Mo3Ti6)
≤0.12 16.00-
19.00
11.00-
14.00
≤2.00 ≤0.035 ≤0.03 2.50-
3.50
≤1.00 - - Ti5
(C%-0.02)~
0.08
  0Cr18Ni
12Mo3Ti
≤0.08 16.00-
19.00
11.00-
14.00
≤2.00 ≤0.035 ≤0.03 2.50-
3.50
≤1.00 - - Ti5*C%-
0.70
317J1 0Cr18Ni
16Mo5
≤0.04 16.00-
19.00
15.00-
17.00
≤2.00 ≤0.035 ≤0.03 4.00-
6.00
≤1.00 - - -
321 1Cr18Ni9Ti6) ≤0.12 17.00-
19.00
8.00-
11.00
≤2.00 ≤0.035 ≤0.030 - ≤1.00 - - Ti5
(C%-0.02)~
0.08
  0Cr18Ni10Ti ≤0.08 17.00-
19.00
9.00-
12.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - - Ti≥5*C%
347 0Cr18Ni11Nb ≤0.08 17.00-
19.00
9.00-
13.00
≤2.00 ≤0.035 ≤0.03 - ≤1.00 - - Nb≥10*C%
XM7 0Cr18Ni9Cu3 ≤0.08 17.00-
19.00
8.50-
10.50
≤2.00 ≤0.035 ≤0.03 - ≤1.00 3.00-
4.00
- -
XM15J1 0Cr18Ni13Si4 ≤0.08 15.00-
20.00
11.50-
15.00
≤2.00
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