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Natron Steel is a trusted manufacturer of Stainless Steel Welded Pipes and Tubes in India. Our welded pipes are known for their durability, corrosion resistance, and versatility, making them suitable for various industrial applications. As one of the leading manufacturers in India, we are committed to delivering top-quality stainless steel pipes tubes that meet the diverse requirements of our clients. With ISO 9001:2000 certification, Natron Steel upholds the highest standards of excellence in manufacturing and customer service, with a proven track record in producing premium stainless steel welded pipes and tubes.

ASTM A312 SS Welded Pipes and Tubes, Stainless Steel Welded Pipes and Tubes, Stainless Steel ERW Pipes, SS ERW Pipes, AISI SS Welded Pipes, ASTM A312 Stainless Steel Welded Pipes and Tubes

As a prominent supplier of stainless steel welded pipes and tubes, we offer a comprehensive range of products manufactured using high-quality stainless steel. Our product lineup includes pipes of various sizes, wall thicknesses, and finishes, catering to industries such as automotive, construction, and food processing. Known for their exceptional corrosion resistance, durability, and cost-effectiveness, our SS welded pipes and tubes are designed to meet the rigorous demands of these sectors.


Stainless Steel Welded Pipes and Tubes Specification

Dimensions ASTM, ASME and API
Specifications ASTM A312, ASTM A249, ASTM A213, ASTM A268, ASTM A269, ASTM A270, ASTM A778
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type ERW / Welded / Fabricated / LSAW Pipes
Grades 304, 304L, 304H, 321H, 321, 316, 316L, 316Ti, 310S, 347, 347H, UNS31803 Duplex
Form Round, Square, Rectangular, Hydraulic Etc
Size 1/8” NB to 36” NB, 1/4” OD to 36” OD sizes stainless steel welded tubes also available
Length Single Random, Double Random & Cut Length.
Thickness 1mm to 20mm, SCH 5/5S, 10/10S, 20/20S, 40/40S, 80/80S, 120/120S, 160/160S as per ANSI B36.19/36.10
End Plain End, Beveled End, Treaded
Finish No.1 Pickled Finish, No.4 finish, BA Finish, Electropolished Welded Pipes
Delivery Condition Hot Finish, Cold Finish, Bright Annealed, Polished, Annealed and Pickled, Passivated, Stress Relived, As Welded, Welded & Externally Polished, Welded Annealed & Pickled, Welded Cold Drawn Annealed & Pickled, Welded Cold Drawn Annealed Pickled & Externally Polished
Test Reports PMI Test Reports, EN 10204 3.1 Certificate, NABL Approved Lab Report on Chemical and Mechanical Properties, NDT or Other Test Reports, 100% X-Ray Welding Reports

We also provide an extensive range of 304, 316 grade stainless steel welded pipes and tubes. These pipes are manufactured from high-quality 304 and 316 stainless steel, renowned for its superior corrosion resistance, strength, and adaptability. Our 316 SS welded pipes are widely used in industries such as oil and gas, petrochemicals, pharmaceuticals, and more, where they are required to endure harsh environments, high pressure, and extreme temperatures. With advanced welding techniques and stringent quality control, Natron Steel ensures that our 304 and 316 SS welded pipes meet industry standards and exceed customer expectations for reliability and performance.


For more information about our stainless steel welded pipes or to place an order, contact Natron Steel today. We are dedicated to delivering high-quality, reliable solutions tailored to meet your specific industrial needs.

SS Welded Pipe and Tube Chemical Properties

Grade C Mn Si P S Cr Mo Ni N Ti Fe
304 min. 18.0 8.0
max. 0.08 2.0 0.75 0.045 0.030 20.0 10.5 0.10
304L min. 18.0 8.0
max. 0.030 2.0 0.75 0.045 0.030 20.0 12.0 0.10
304H min. 0.04 18.0 8.0
max. 0.010 2.0 0.75 0.045 0.030 20.0 10.5
SS 310 0.015 max 2 max 0.015 max 0.020 max 0.015 max 24.00 26.00 0.10 max 19.00 21.00 54.7 min
SS 310S 0.08 max 2 max 1.00 max 0.045 max 0.030 max 24.00 26.00 0.75 max 19.00 21.00 53.095 min
SS 310H 0.04 0.10 2 max 1.00 max 0.045 max 0.030 max 24.00 26.00 19.00 21.00 53.885 min
316 min. 16.0 2.03.0 10.0  
max. 0.035 2.0 0.75 0.045 0.030 18.0 14.0  
316L min. 16.0 2.03.0 10.0    
max. 0.035 2.0 0.75 0.045 0.030 18.0 14.0  
316TI 0.08 max 10.00 14.00 2.0 max 0.045 max 0.030 max 16.00 18.00 0.75 max 2.00 3.00
317 0.08 max 2 max 1 max 0.045 max 0.030 max 18.00 20.00 3.00 4.00 57.845 min
SS 317L 0.035 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 20.00 3.00 4.00 11.00 15.00 57.89 min
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 19.00 9.00 12.00 0.10 max 5(C+N) 0.70 max
SS 321H 0.04 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 19.00 9.00 12.00 0.10 max 4(C+N) 0.70 max
347/ 347H 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 20.00 9.0013.00
410 min. 11.5
max. 0.15 1.0 1.00 0.040 0.030 13.5 0.75
446 min. 23.0 0.10
max. 0.2 1.5 0.75 0.040 0.030 30.0 0.50 0.25
904L min. 19.0 4.00 23.00 0.10
max. 0.20 2.00 1.00 0.045 0.035 23.0 5.00 28.00 0.25

Mechanical Characteristics of Stainless Steel Pipe and Tubes

Grade Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
304/ 304L 8.0 g/cm3 1400 °C (2550 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
304H 8.0 g/cm3 1400 °C (2550 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 40 %
310 / 310S / 310H 7.9 g/cm3 1402 °C (2555 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 40 %
306/ 316H 8.0 g/cm3 1400 °C (2550 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
316L 8.0 g/cm3 1399 °C (2550 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
317 7.9 g/cm3 1400 °C (2550 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
321 8.0 g/cm3 1457 °C (2650 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
347 8.0 g/cm3 1454 °C (2650 °F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
904L 7.95 g/cm3 1350 °C (2460 °F) Psi 71000 , MPa 490 Psi 32000 , MPa 220 35 %

Stainless Steel Welded Pipe and Tube Equivalent material

STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 304 1.4301 S30400 SUS 304 304S31 08Х18Н10 Z7CN18‐09 X5CrNi18-10
SS 304L 1.4306 / 1.4307 S30403 SUS 304L 3304S11 03Х18Н11 Z3CN18‐10 X2CrNi18-9 / X2CrNi19-11
SS 304H 1.4301 S30409 – – – – –
SS 310 1.4841 S31000 SUS 310 310S24 20Ch25N20S2 – X15CrNi25-20
SS 310S 1.4845 S31008 SUS 310S 310S16 20Ch23N18 – X8CrNi25-21
SS 310H – S31009 – – – – –
SS 316 1.4401 / 1.4436 S31600 SUS 316 316S31 / 316S33 – Z7CND17‐11‐02 X5CrNiMo17-12-2 / X3CrNiMo17-13-3
SS 316L 1.4404 / 1.4435 S31603 SUS 316L 316S11 / 316S13 03Ch17N14M3 / 03Ch17N14M2 Z3CND17‐11‐02 / Z3CND18‐14‐03 X2CrNiMo17-12-2 / X2CrNiMo18-14-3
SS 316H 1.4401 S31609 – – – – –
SS 316Ti 1.4571 S31635 SUS 316Ti 320S31 08Ch17N13M2T Z6CNDT17‐123 X6CrNiMoTi17-12-2
SS 317 1.4449 S31700 SUS 317 – – – –
SS 317L 1.4438 S31703 SUS 317L – – – X2CrNiMo18-15-4
SS 321 1.4541 S32100 SUS 321 – – – X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H – – – X12CrNiTi18-9
SS 347 1.4550 S34700 SUS 347 – 08Ch18N12B – X6CrNiNb18-10
SS 347H 1.4961 S34709 SUS 347H – – – X6CrNiNb18-12
SS 904L 1.4539 N08904 SUS 904L 904S13 STS 317J5L Z2 NCDU 25-20 X1NiCrMoCu25-20-5
Stainless Steel EFW Welded Pipe and Tube Dimensions
PIPE SCHEDULES WALL THICKNESS (Inches)
Nominal
O.D. Inches
10s
10
40s & Std
40
80s & E.H.
80
160
1/8
.405
.049
.049
.068
.068
.095
.095
1/4
.540
.065
.065
.088
.088
.119
.119
3/8
.675
.065
.065
.091
.091
.126
.126
1/2
.840
.083
.083
.109
.109
.147
.147
.187
3/4
1.050
.083
.083
.113
.113
.154
.154
.218
1
1.315
.109
.109
.133
.133
.179
.179
.250
1 1/4
1.660
.109
.109
.140
.140
.191
.191
.250
1 1/2
1.900
.109
.109
.145
.145
.200
.200
.281
2
2.375
.109
.109
.154
.154
.218
.218
.343
2 1/2
2.875
.120
.120
.203
.203
.276
.276
.375
3
3.500
.120
.120
.216
.216
.300
.300
.437
3 1/2
4.000
.120
.120
.226
.226
.318
.318
4
4.500
.120
.120
.237
.237
.337
.337
.531
4 1/2
5.000
.247
.355
5
5.563
.134
.134
.258
.258
.375
.375
.625
6
6.625
.134
.134
.280
.280
.432
.432
.718
7
7.625
.301
.500
8
8.625
.148
.148
.322
.322
.500
.500
.906
9
9.625
.342
.500
10
10.750
.165
.165
.365
.365
.500
.593
1.125
11
11.750
.375
.500
12
12.750
.180
.180
.375
.406
.500
.687
1.312
14
14.000
.188
.250
.375
.437
.500
.750
1.406
16
16.000
.188
.250
.375
.500
.500
.843
1.593
18
18.000
.188
.250
.375
.562
.500
.937
1.781
ASTM A312 SS Welded Pipe and Tube Pressure Rating
Pipe Size O.D. Inches 5s TRUE 5 10s TRUE 10 20 30 40s & STD TRUE 40 60
1/8 0.405   0.35 0.049 0.049     0.068 0.068  
    0.1383 0.1863 0.1863     0.2447 0.2447  
1/4 0.54   0.049 0.065 0.065     0.088 0.088  
    0.257 0.3297 0.3297     0.4248 0.4248  
3/8 0.675   0.049 0.065 0.065     0.091 0.091  
    0.3276 0.4235 0.4235     0.5676 0.5676  
1/2 0.84 0.065 0.065 0.083 0.083     0.109 0.109  
  0.5383 0.5383 0.671 0.671     0.851 0.851  
3/4 1.05 0.065 0.065 0.083 0.083     0.113 0.113  
  0.6838 0.6838 0.8572 0.8572     1.131 1.131  
1 1.315 0.065 0.065 0.109 0.19     0.133 0.133  
  0.8678 0.8678 1.404 1.404     1.679 1.679  
1 1/4 1.66 0.065 0.065 0.109 0.109     0.14 0.14  
  1.107 1.107 1.806 1.806     2.273 2.273  
1 1/2 1.9 0.065 0.065 0.109 0.109     0.145 0.145  
  1.274 1.274 2.638 2.638     2.718 2.718  
2 2.375 0.065 0.065 0.109 0.109     0.154 0.154  
  1.604 1.604 2.638 2.638     3.653 3.653  
2 1/2 2.875 0.083 0.083 0.12 0.12     0.203 0.203  
  2.475 2.475 3.531 3.531     5.793 5.793  
3 3.5 0.083 0.083 0.12 0.12     0.216 0.216  
  3.029 3.029 4.332 4.332     7.576 7.576  
3 1/2 4 0.083 0.083 0.12 0.12     0.226 0.226  
  3.472 3.472 4.97 4.97     9.109 9.109  
4 4.5 0.083 0.083 0.12 0.12     0.237 0.237 0.281
  3.915 3.915 5.613 5.613     10.79 10.79 12.66
4 1/2 5             0.247    
              12.53    
5 5.563 0.109 0.109 0.134 0.134     0.258 0.258  
  6.349 6.349 7.77 7.77     14.62 14.62  
6 6.625 0.109 0.109 0.134 0.134     0.28 0.28  
  7.585 7.585 9.289 9.289     18.97 18.97  
7 7.625             0.301    
              23.57    
8 8.625 0.109 0.109 0.148 0.148 0.25 0.277 0.322 0.322 0.406
  9.914 9.914 13.4 13.4 22.36 24.7 28.55 28.55 35.64
9 9.625             0.342    
              33.9    
10 10.75 0.134 0.134 0.165 0.165 0.25 0.307 0.365 0.365 0.5
  15.19 15.19 18.65 18.65 28.04 34.24 40.48 40.48 54.74
11 11.75             0.375    
              45.55    
12 12.75 0.156 0.165 0.18 0.18 0.25 0.33 0.375 0.406 0.562
  21.07 22.18 24.2 24.2 33.38 43.77 49.56 53.53 73.16
14 14 0.156   0.188 0.25 0.312 0.375 0.375 0.437 0.593
  23.06   27.73 36.71 45.68 54.57 54.57 63.67 84.91
16 16 0.165   0.188 0.25 0.312 0.375 0.375 0.5 0.656
  27.9   31.75 42.05 52.36 62.58 62.58 82.77 107.5
18 18 0.165   0.188 0.25 0.312 0.437 0.375 0.562 0.75
  31.43   35.76 47.39 59.03 82.06 70.59 104.8 138.2
20 20 0.188   0.218 0.25 0.375 0.5 0.375 0.593 0.812
  39.78   46.05 52.73 78.6 104.1 78.6 122.9 166.4
24 24 0.218   0.25 0.25 0.375 0.562 0.375 0.687 0.968
  55.37   63.41 63.41 94.62 140.8 94.62 171.2 238.1
26 26       0.312 0.5   0.375    
        85.6 136.2   102.6    
28 28       0.312 0.5 0.625 0.375    
        92.26 146.8 182.7 110.6    
30 30 0.25   0.312 0.312 0.5 0.625 0.375    
  79.43   98.93 98.93 157.5 196.1 118.6    
32 32       0.312 0.5 0.625 0.375 0.688  
        105.6 168.2 209.4 126.7 230.1  
34 34       0.312 0.5 0.625 0.375 0.688  
        112.3 178.9 222.8 134.7 244.8  
36 36       0.312   0.625 0.375 0.75  
        118.9   236.1 142.7 282.3  
40 40             0.375    
              158.7    
42 42             0.375    
              166.7    
48 48             0.375    
              190.7    
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