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Alloy Steel Seamless Pipe Manufacturers

At Sachin Steel Center, we specialize in supplying high-quality Alloy Steel Seamless Pipes and Tubes for critical industries, including power plants, petrochemical plants, and refineries due to their superior mechanical properties. Our seamless pipes and tubes are engineered to meet the high-temperature service requirements of various applications, offering enhanced performance, durability, and reliability.

Our alloy steel seamless pipes and tubes are manufactured using premium-grade materials, ensuring high strength, corrosion resistance, and long-term durability. We offer customized dimensions to meet specific project requirements, including different wall thicknesses, diameters, and lengths. Using cold drawing or hot drawing methods, we produce smooth, seamless pipes and tubes that are free from defects and ready for immediate use in demanding applications. We offer cost effective solutions without compromising on quality, making Sachin Steel Center the preferred supplier for businesses looking for premium alloy steel products at competitive rates.

Looking for alloy steel seamless pipes and tubes? Contact Sachin Steel Center today for a custom quote and get expert advice on your project requirements. Let us provide you with the best seamless alloy steel products that meet your exact needs.

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Alloy Steel Seamless Pipe & Alloy Steel ERW Pipe Manufacturers in India, ASTM A335 Seamless Pipe, Seamless Ferritic Alloy Steel Pipes, ASTM A519 Alloy Steel Seamless Tubing, Alloy Steel Pipes, Alloy Steel Tubes, Alloy Steel Seamless Pipes

Table Of Content

Introduction to Alloy Steel Seamless Pipe & Tube

Alloy Steel Seamless Pipes and Tubes are high-performance products designed for applications that require strength, durability, and resistance to extreme temperatures and high pressure. An Alloy Steel Seamless Pipe is a pipe manufactured from an alloy steel products that undergoes a seamless forming process, resulting in a uniform, smooth surface without any weld joints. This process provides superior mechanical properties compared to welded pipes, including higher strength and resistance to pressure and corrosion. Alloy steel seamless pipes are manufactured using methods like hot extrusion, cold drawing, or hot rolling. These processes ensure that the pipes maintain uniform thickness, strength, and surface finish. Heat treatments such as annealing and tempering are applied to further enhance the pipe’s mechanical properties and performance.

Characteristics of Alloy Steel (ASTM A335, ASME SA335) Seamless Tube

  • Higher Working Pressure: Seamless alloy steel pipes are designed to handle up to 20% more working pressure than welded pipes, making them ideal for high-pressure applications.
  • Corrosion Resistance: Seamless pipes are highly resistant to corrosion, oxidation, and degradation from high temperatures, ensuring longer service life.
  • No Weld Defects: The absence of a weld seam means there are no risk factors such as intergranular corrosion or weld defects, which is common in welded pipes.
  • Enhanced Strength: They offer higher tensile strength, yield strength, and resistance to fatigue, making them ideal for heavy-duty industrial use.
  • Superior Surface Quality: The smooth surface of seamless pipes reduces flow restrictions, making them ideal for fluid transport applications.

Alloy Steel Seamless Pipes & Tubes are essential components used in industries requiring high strength, durability, and resistance to high temperatures and pressures. Various grades and standards are followed to meet the specific requirements of industries.

  1. ASTM A335 – Chrome Moly Pipe (P-Grades)

ASTM A335 is one of the most widely used standards for seamless ferritic alloy-steel pipes intended for high-temperature service. The pipes manufactured under this specification are commonly referred to as Chrome-Moly pipes due to their composition of Chromium (Cr) and Molybdenum (Mo) which enhance strength, hardness & resistance to oxidation at elevated temperatures.

  • Grades: P5, P9, P11, P22, P91
  • Properties: Excellent high-temperature strength, creep resistance, and corrosion resistance in harsh environments.
  1. ASTM A213 – Alloy Steel Boiler & Heat Exchanger Tubes

ASTM A213 covers the requirements for seamless ferritic and austenitic alloy-steel tubes used in boilers, superheaters, and heat exchangers. This standard is essential for applications that involve high-pressure and high-temperature fluids, such as in steam generation and heat exchange systems.

  • Grades: TP304, TP347, TP316, TP347H
  • Properties: High creep strength, excellent thermal conductivity, corrosion resistance in high-temperature environments.
  1. ASTM A519 – Seamless Mechanical Tubing

ASTM A519 outlines the requirements for carbon and alloy steel seamless mechanical tubing that is used for structural and mechanical applications. These tubes are commonly used in industries that require high strength, durability, and reliability under pressure.

  • Grades: 1020 (Carbon Steel), 4130 (Alloy Steel), 4140 (Alloy Steel), 4340 (Alloy Steel)
  • Properties: High tensile strength, impact resistance, excellent weldability, and mechanical properties suitable for high-pressure applications.
  1. ASME SA335 – Pressure Vessels & Heat Exchanger Tubes

The ASME SA335 standard is almost identical to ASTM A335, but it is a part of ASME Boiler and Pressure Vessel Code (BPVC), specifically designed for use in high-pressure applications. It is used in heat exchangers, boilers, and pressure vessels that operate at high temperatures and pressures.

  • Grades: P5, P9, P11, P22, P91
  • Properties: High-temperature strength, resilience under high pressure, excellent wear resistance.

Types of Alloy Steel Seamless Pipes & Tubes

seamless-pipes

Alloy Steel Seamless Tube

seamless-tubes

Alloy Steel Heat Exchanger Tube

erw

Alloy Steel Hot Finished Tube

Rectangular Pipe

Alloy Steel Cold Drawn Tube

Welded Tube

Alloy Steel High Pressure Tube

Square Pipe

Alloy Steel Heater Tube

Request Quote on Types of Alloy Steel Seamless Pipe & Tube
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Alloy Steel Seamless Tubes, ASTM A335, A213, ASME SA335, SA213, Alloy Steel Seamless Pipe & Tubes Supplier, ASTM A335 Seamless Square Pipes, Alloy Steel Pipes, Alloy Steel Seamless Pipes, ASME SA335 Alloy Pipe Manufacturer in India

Specifications Standards of Alloy Steel Seamless Pipe

Specifications ASTM A 335 ASME SA 335
Dimensions ASTM, ASME and API
Size 1/8″NB TO 30″NB IN
Tubing Size 1 / 2” OD up to 5” OD, customs diameters also available
Outer Diameter 6-2500mm; WT:1-200mm
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Grade STM A335 Gr. P5, P9, P11, P12, P21, P22 & P91, ASTM A213 – T5, T9, T11, T12, T22, T91, ASTM A691
Length Within 13500mm
Type Seamless / Fabricated
Form Round, Hydraulic Etc
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded

ASTM A335 Alloy Steel Seamless Pipes Chemical Compositions

Grade P-5 P-9 P-11 P-22 P-91 P-91 shall also include the following
Element UNS Designation K41545 S50400 K11597 K21590 K91560
Carbon 0.15 max 0.15 max 0.05 – 0.15 0.05 – 0.15 0.08 – 0.12 V at 0.18 – 0.25
Manganese 0.30 – 0.60 0.30 – 0.60 0.30 – 0.60 0.30 – 0.60 0.30 – 0.60 N at 0.030 – 0.070
Phosphorous, max 0.025 0.025 0.025 0.025 0.020 Ni at 0.40 max
Sulfur, max 0.025 0.025 0.025 0.025 0.010 Al at 0.02 max
Silicon 0.50 max 0.25 – 1.00 0.50 – 1.00 0.50 max 0.20 -0.50 Cb at 0.06 – 0.10
Chromium 4.00 – 6.00 8.00 – 10.00 1.00 – 1.50 1.90 – 2.60 8.00 – 9.50 Ti at 0.01 max
Molybdenum 0.45 -0.65 0.90 – 1.10 0.44 – 0.65 0.87 – 1.13 0.85 – 1.05 Zr at 0.01 max

ASTM A213 Alloy Steel Seamless Tubes Chemical Composition

Grade Chemical Composition%
C Si Mn P, S Max Cr Mo Ni Max V Al Max
T11 0.05~0.15 0.50~1.00 0.30~0.60 0.025 1.00~1.50 0.44~0.65 – – –
T12 0.05~0.15 Max 0.5 0.30~0.61 0.025 0.80~1.25 0.44~0.65 – – –
T22 0.05~0.15 Max 0.5 0.30~0.60 0.025 1.90~2.60 0.87~1.13 – – –
T91 0.07~0.14 0.20~0.50 0.30~0.60 0.02 8.0~9.5 0.85~1.05 0.4 0.18~0.25 0.015

Alloy Steel Seamless Pipes Pressure Rating

Maximum Allowable Pressure (psi)
NPS Outside Diameter Schedule
(in) (in) 10 20 30 STD 40 60 XS 80 100 120 140 160 XXS
1/4 0.54 7985 7985 10798 10798
3/8 0.675 6606 6606 9147 9147
1/2 0.84 6358 6358 8575 8575 10908 17150
3/4 1.05 5273 5273 7187 7187 10220 14373
1 1.315 4956 4956 6670 6670 9316 13340
1 1/4 1.66 4133 4133 5638 5638 7380 11276
1 1/2 1.9 3739 3739 5158 5158 7247 10316
2 2.375 3177 3177 4498 4498 7097 8995
2 1/2 2.875 3460 3460 4704 4704 6391 9408
3 3.5 3024 3024 4200 4200 6132 8400
3 1/2 4 2769 2769 3896 3896
4 4.5 2581 2581 3670 3670 4769 5782 7339
5 5.563 2273 2273 3303 3303 4404 5505 6606
6 6.625 2071 2071 3195 3195 4157 5318 6390
8 8.625 1420 1574 1829 1829 2307 2841 2841 3375 4085 4613 5147 4971
10 10.75 1140 1399 1664 1664 2279 2279 2708 3277 3847 4558 5128 4558
12 12.75 961 1268 1441 1560 2160 1922 2644 3244 3843 4324 5042 3843
14 14 875 1092 1313 1313 1533 2079 1750 2625 3283 3829 4375 4921
16 16 766 956 1148 1148 1531 2009 1531 2585 3157 3733 4404 4882
18 18 681 849 1192 1021 1530 2042 1361 2553 3147 3743 4252 4848
20 20 613 919 1225 919 1455 1989 1225 2526 3138 3675 4288 4824
22 22 557 835 1114 835 1949 1114 2506 3063 3619 4176 4733
24 24 510 766 1147 766 1405 1978 1021 2489 3126 3700 4210 4786
30 30 510 817 1021 613 817
32 32 478 766 957 574 1054
34 34 450 721 901 540 992
36 36 425 681 851 510 1021
42 42 583 729 438 875

Alloy Steel Seamless Pipe Weight Chart

Size NPS Pipe O.D. Wall Thickness Pipe I.D. Weight per Foot Standard to XXHY Schedule
Pipe #		 Section Modulus Gallon Capacity Per Linear Foot
1/2 0.84 0.109 0.622 0.85 STD 40 .0407 .0158
    0.147 0.546 1.09 XHY 80 .0478 .0122
    0.188 0.464 1.31   160 .0528 .0088
    0.294 0.252 1.72 XXHY   .0577 .0026
3/4 1.05 0.113 0.824 1.13 STD 40 .0705 .0277
    0.154 0.742 1.48 XHY 80 .0853 .0225
    0.219 0.612 1.95   160 .1006 .0153
    0.308 0.434 2.44 XXHY   .1103 .0077
1 1.315 0.133 1.049 1.68 STD 40 .1328 .0449
    0.179 0.957 2.17 XHY 80 .1606 .0374
    0.250 0.815 2.85   160 .1904 .0271
    0.358 0.599 3.66 XXHY   .2136 .0146
1 1/4 1.66 0.140 1.380 2.27 STD 40 .2346 .0777
    0.191 1.278 3.00 XHY 80 .2913 .0666
    0.250 1.160 3.77   160 .3421 .0549
    0.382 0.896 5.22     .4110 .0328
1 1/2 1.90 0.145 1.610 2.72 STD 40 .3262 .1058
    0.200 1.500 3.63 XHY 80 .4118 .0918
    0.281 1.338 4.86   160 .5079 .0730
    0.400 1.100 6.41     .5977 .0494
2 2.375 0.109 2.157 2.64   10 .4205 .1898
    0.154 2.067 3.66 STD 40 .5606 .1743
    0.218 1.939 5.03 XHY 80 .7309 .1534
    0.250 1.875 5.68     .8045 .1434
    0.281 1.813 6.29     .8666 .1344
    0.344 1.687 7.47   160 .9806 .1161
    0.436 1.503 9.04 XXHY   1.1043 .0922
2 1/2 2.875 0.120 2.635 3.53   10 .6870 .2833
    0.203 2.469 5.80 STD. 40 1.0640 .2487
    0.216 2.443 6.14     1.1169 .2435
    0.250 2.375 7.02     1.2468 .2301
    0.276 2.323 7.67 XHY 80 1.3386 .2202
    0.375 2.125 10.02   160 1.6371 .1842
    0.552 1.771 13.71 XXXHY   1.9971 .1280
3 3.50 0.120 3.260 4.34     1.0411 .4336
    0.156 3.188 5.58     1.3122 .4147
    0.172 3.156 6.12     1.4265 .4064
    0.188 3.124 6.66     1.5342 .3984
    0.216 3.068 7.58 STD. 40 1.7241 .3840
    0.250 3.000 8.69     1.9372 .3672
    0.281 2.938 9.67     2.1207 .3521
    0.300 2.900 10.26 XHY 80 2.2253 .3431
    0.438 2.624 14.34   160 2.8774 .2811
    0.600 2.300 18.6 XXHY   3.4243 .2158
3 1/2 4.0 0.120 3.760 4.98   10 1.3776 .5768
    0.226 3.548 9.12 STD. 140 2.3939 .5136
    0.250 3.500 10.02     2.6001 .4998
    0.281 3.438 11.17     2.8562 .4821
    0.318 3.364 12.52 XHY 80 3.1400 .4617
    0.636 2..728 22.87 XXHY   4.8795 .3085
4 4.5 0.120 4.260 5.62   10 1.7612 .7404
    0.156 4.188 7.24     2.2354 .7156
    0.188 4.124 8.67     2.6296 .6942
    0.203 4.094 9.32     2.8173 .6838
    0.219 4.062 10.02     3.0184 .6725
    0.237 4.026 10.80 STD. 40 3.2145 .6613
    0.250 4.000 11.36     3.3611 .6528
    0.281 3.938 12.67   60 3.7021 .6326
    0.312 3.876 13.97     4.0273 .6126
    0.337 3.826 15.00 XHY 80 4.2713 .5972
    0.438 3.624 19.02   120 5.1790 .5361
    0.531 3.438 22.53   160 5.8997 .4822
    0.674 3.152 27.57 XXHY   6.7927 .4054
5 5.563 0.188 5.187 10.80     4.1161 1.0979
    0.219 5.125 12.51     4.7279 1.0716
    0.258 5.047 14.63 STD. 40 5.4500 1.0391
    0.281 5.001 15.87     5.8644 1.0204
    0.312 4.939 17.51     6.4074 .99647
    0.344 4.875 19.19     6.9358 .9696
    0.375 4.813 20.80 XHY 80 7.4300 .9449
    0.500 4.563 27.06   120 9.2534 .8495
    0.625 4.313 32.99   160 10.7976 .7590
    0.750 4.063 38.59 XXHY   12.0954 .6734
6 6.625 0.109 6.407 7.59   5 3.5769 1.6748
    0.134 6.357 9.30   10 4.3475 1.6488
    0.156 6.313 10.79     5.0107 1.6260
    0.188 6.249 12.94     5.9351 1.5937
    0.203 6.219 13.94     6.3804 1.5780
    0.219 6.187 15.00     6.8261 1.5620
    0.250 6.125 17.04     7.6905 1.5306
    0.280 6.065 18.99 STD. 40 8.4958 1.5008
    0.312 6.001 21.06     9.3416 1.4688
    0.344 5.937 23.10     10.111 1.4391
    0.375 5.875 25.05     10.893 1.4082
    0.432 5.761 28.60 XHY 80 12.224 1.3541
    0.500 5.625 32.74     13.711 1.2909
    0.562 5.501 36.43   120 14.9806 1.2346
    0.625 5.375 40.09     16.1821 1.1787
    0.719 5.187 45.39   160 17.8243 1.0977
    0.864 4.897 53.21 XXHY   20.025 .9784
    1.000 4.625 60.13     21.7719 .8727
    1.125 4.375 66.14     23.1237 .7809

Mechanical Properties for Alloy Steel Seamless Tubes

Grades

Mechanical Properties

  

Y. P

Elongation

Hardness

  

T11

≥ 415MPa

≥ 205MPa

≥ 30%

163HBW(85HRB)

T12

≥ 415MPa

≥ 220MPa

≥ 30%

163HBW(85HRB)

T22

≥ 415MPa

≥ 205MPa

≥ 30%

163HBW(85HRB)

T91

≥ 585MPa

≥ 415MPa

≥ 20%

250HBW(25HRB)

Applications of Alloy Steel Seamless Pipe & Tubes

  • Chemicals
  • Pharmaceutical
  • Aircraft
  • Paper Industry
  • Food & Beverage
  • Textiles
  • Dairy
  • Hospital Equipment
  • Others Parts in Machinery
Application Industries

Frequently Asked Questions About Alloy Steel Seamless Pipe

  • ASTM A335 is for seamless alloy-steel pipes used in high-temperature applications like power plants and refineries, suitable for high-pressure and elevated temperature environments.
  • ASTM A213 covers seamless tubes for boilers, superheaters, and heat exchangers, focusing on improved creep strength and corrosion resistance.

ASTM A335 Chrome-Moly pipe is preferred due to its high-temperature strength, creep resistance, and corrosion resistance. The addition of Chromium (Cr) and Molybdenum (Mo) enhances oxidation resistance, making it ideal for power plants and refineries.

ASTM A519 is used in industries like automotive (for chassis and axles), aerospace (for structural parts), oil & gas (for piping systems), and construction (for structural components). It’s designed for high-strength, high-pressure applications.

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