SMO 254 Pipe

254 SMO pipe suppliers in India
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SMO 254 Pipe

SMO 254 Pipe is a high-alloy austenitic stainless steel pipe developed for demanding environments where high resistance to pitting, crevice corrosion and chloride-containing media is required. It is commonly known as 254 SMO and is identified by UNS S31254.

With high chromium, molybdenum and nitrogen content, 254 SMO offers a higher level of localized corrosion resistance than many conventional austenitic stainless steels. It can be considered for marine, chemical processing, desalination, pollution control, pharmaceutical and other industrial applications.

Material selection should always consider the actual chemical environment, temperature, chloride concentration, pressure and mechanical requirements.

20+
Years of Experience
50+
Grades in Stock
1/8"–2–4"
Size Range
100%
Quality Tested

Specification of SMO 254 pipe

Specification of SMO 254 pipe

SPECIFICATIONDETAILS
Thickness0.4 to 30.00 mm
Delivery conditionsolution annealed and white pickled
Critical pitting temperature50°C (122°F)
Roughness factorbetween 0.1 to 1 µm or higher
Trade nameSandvik 254 SMO
Pipe EndBeveled, Plain
ERW pipe sizesOD: 10 to 600mm, Length: 0.5 to 12 meter, WT: 2.5 to 100mm
TechniqueCold Formed, Hot Formed, Precision Rolled
Welded pipe sizesWT: 0.3 to 50 mm, Length: up to 26 Meters, OD: 6.0 to 630mm
Seamless pipe sizesLength: Double Random, Single & Cut Length, OD: 6.0 to 630mm, WT:0.3 to 50 mm
Manufacturing processERW, Fabricated, Welded, Seamless
Specifications standardASTM A312, ASME SA 312
254 SMO pipe

254 SMO pipe

ASTM A312 UNS S31254 seamless pipe

ASTM A312 UNS S31254 seamless pipe

6mo ERW pipe

6mo ERW pipe

A312 S31254 welded pipe

A312 S31254 welded pipe

254 SMO EFW pipe

254 SMO EFW pipe

ASTM A312 S31254 square pipes

ASTM A312 S31254 square pipes

ASTM A312 UNS S31254 seamless pipe pressure rating

ASTM A312 UNS S31254 seamless pipe pressure rating

OD (in.) Wall Thickness (in.)
0.120 0.109 0.095 0.065 0.049 0.083 0.035 0.028
- Pressure (psig)
5/16 - - - 7300 5400 - 3700 -
1/2 - - - 4400 3200 - 2300 -
1 4300 3900 3400 2200 - 2900 - -
1/4 - - - 9500 7000 - 4800 3700
1/8 - - - - - - 10100 7900
3/8 - - - 6100 4400 - 3100 -
3/4 - - 4600 3000 2200 4000 - -

Dimension of 6MO ERW pipe

Dimension of 6MO ERW pipe

Outside Diameter (OD) mm Standard Length (m) Wall Thickness (mm)
48.3 6.0 3.2
60.3 6.0 3.6
73.0 6.0 4.0
21.3 6.0 2.0
26.7 6.0 2.3
33.4 6.0 2.6
42.2 6.0 2.9
88.9 6.0 5.5
101.6 6.0 5.7
114.3 6.0 6.0

A312 S31254 welded pipe sizes

A312 S31254 welded pipe sizes

Nominal Pipe Size in Inch THK in MM Volume (ft3/ft) Diameter in Milimeter Length of Pipe (ft per sq. foot of Surface) Weight Transverse Areas (in2) MM2 NO of Threads per inch of Screw
Internal External Internal Surface (ft) External Surface (ft) (kg/meter) (lb/ft) Steel Internal External
18" 0.56 1.5550 16.88 18 0.23 0.21 156.26 105.00 30.85 224.00 254.85 8
¼" 0.09 07 0.36 0.540 10.49 7.07 0.63 0.42 0.13 0.10 0.23 18
½" 0.11 0.0021 0.62 0.840 6.14 4.55 1.26 0.85 0.25 0.30 0.55 14
1" 0.13 0.0060 1.05 1.315 3.64 2.90 2.50 1.68 0.49 0.86 1.36 11 ½
20" 0.59 1.9260 18.81 20 0.20 0.19 183.05 123.00 36.15 278.00 314.15 8
16" 0.50 1.2230 15.00 16 0.25 0.24 116.08 78.00 24.35 176.70 201.05 8
12" 0.41 0.7763 11.94 12.750 0.32 0.30 79.77 53.60 15.74 111.90 127.64 8
8" 0.32 0.3552 7.98 8.625 0.48 0.44 42.49 28.55 8.40 50.02 58.42 8
5" 0.26 0.1389 5.05 5.563 0.76 0.69 21.74 14.61 4.30 20.00 24.30 8
1/8" 0.07 04 0.27 0.405 14.20 9.43 0.36 0.24 0.07 0.06 0.13 27
3/8" 0.09 0.0013 0.49 0.675 7.75 5.66 0.84 0.57 0.17 0.19 0.36 18
¾" 0.11 0.0037 0.82 1.050 4.64 3.64 1.68 1.13 0.33 0.53 0.87 14
1 ¼" 0.14 0.0104 1.38 1.660 2.77 2.30 3.38 2.27 0.67 1.50 2.16 11 ½
2" 0.15 0.0233 2.07 2.375 1.85 1.61 5.43 3.65 1.08 3.36 4.43 11 ½
3" 0.22 0.0513 3.07 3.500 1.25 1.09 11.27 7.58 2.23 7.39 9.62 8
4" 0.24 0.0884 4.03 4.500 0.95 0.85 16.06 10.79 3.17 12.73 15.90 8
6" 0.28 0.2006 6.07 6.625 0.63 0.58 28.23 18.97 5.58 28.89 34.47 8
10" 0.37 0.5476 10.02 10.750 0.38 0.36 60.24 40.48 11.90 78.85 90.76 8
14" 0.44 0.9354 13.13 14 0.28 0.27 93.75 63.00 18.64 135.30 153.94 8
1 ½" 0.15 0.0141 1.61 1.900 2.37 2.01 4.04 2.72 0.80 2.04 2.84 11 ½
3 ½" 0.23 0.0687 3.55 4 1.08 0.95 13.56 9.11 2.68 9.89 12.56 8
2 ½" 0.20 0.0333 2.47 2.875 1.55 1.33 8.62 5.79 1.70 4.79 6.49 8
24" 0.69 2.7930 22.63 24 0.17 0.16 254.48 171.00 50.30 402.10 452.40 8

254 SMO seamless pipe price list

254 SMO seamless pipe price list

Description Price in USD Price in Kilogram (INR)
Round Smo 254 Pipe, 6 meter $ 21.02 ₹ 1,800
Round Stainless Steel SMO 254 Pipe, 3 meter $ 4.09 ₹ 350

S31254 pipe testing

  • 100% PMI
  • Flaring
  • Flange
  • Hardness
  • Reverse flattening
  • Tension

Weight chart of 254 SMO EFW pipe

Weight chart of 254 SMO EFW pipe

Nominal Size Weight Weight Schedule Weight OutSide Diamter (O.D)
kg/Mtr Inch MM Lb/ft MM Inch
1 1/4" 3.0385 0.0140 3.0556 40 2.0273 42 1.0660
3" 11.0284 0.0216 5.0486 40 7.0576 89 3.0500
36" 142.0180 0.0250 6.0350 – 95.0453 914 36
4" 16.0073 0.0237 6.0020 – 10.0790 114 4.0500
2" 5.0441 0.0154 3.0912 40 3.0653 60 2.0375
14" 41.0308 0.0188 4.0775 – 27.0732 356 14
18" 61.0948 0.0219 5.0563 – 41.0588 457 18
2 1/2" 8.0629 0.0203 5.0516 40 5.0793 73 2.0875
1 1/2" 4.0048 0.0145 3.0683 40 2.0718 48 1.0900
42" 206.0914 0.0312 7.0925 – 138.0911 1067 42
12" 37.0570 0.0188 4.0775 – 25.0222 324 12.0750
48" 284.0112 0.0375 9.0525 – 190.0738 1219 48
1/2" 1.0268 0.0109 2.0769 40 0.0851 21 0.0840
20" 78.0547 0.0250 6.0350 – 52.0733 508 20
6" 19.0252 0.0188 4.0775 – 12.0924 168 6.0625
3/4" 1.0684 0.0113 2.0870 40 1.0131 27 1.0050
30" 118.0318 0.0250 6.0350 – 79.0433 762 30
8" 25.0233 0.0188 4.0775 – 16.0940 219 8.0625
1" 2.0501 0.0133 3.0378 40 1.0679 33 1.0315

Test certificates of ASTM A312 S31254 square pipes

Test certificates of ASTM A312 S31254 square pipes

Desalination Plants Marine and Offshore Equipment Heat Exchangers and Condensers
Chemical Processing Industry Oil and Gas Refineries Pulp and Paper Industry
Seawater Cooling Systems Pollution Control Equipment Food and Beverage Processing

Chemical composition of SMO 254 pipe

Chemical composition of SMO 254 pipe

C Cr Mn Si P Cr S Ni Mo Cr Cu
≤0.020 20 ≤1.00 ≤0.80 ≤0.030 20 ≤0.010 18 6.1 20 0.7

A312 UNS S31254 rectangle pipes mechanical properties

A312 UNS S31254 rectangle pipes mechanical properties

Density Yield Strength (0.2%Offset) Melting Point Tensile Strength Elongation
8.0 g/cm3 300 1320-1390 ℃ 650 35 %

254 SMO Welded pipe equivalent grades

254 SMO Welded pipe equivalent grades

STANDARD UNS WERKSTOFF NR. AFNOR SIS EN JIS GOST
SMO 254 S31254 1.4547 Z1 CNDU 20.18.06Az 2378 X1CrNiMoCuN20-18-7 – –

UNS S31254 pipe physical properties

UNS S31254 pipe physical properties

Modulus of Elasticity psi x106 26 25 27 29 28
Temperature °F 572 752 392 68 212
Electrical Resistivity Ωin x 10-6 40.6 43.3 37.4 33.5 35.4
Heat Capacity Btu/lb°F 0.133 0.136 0.129 0.12 0.124
Thermal Conductivity Btu/h ft°F 9.8 10.4 8.7 7.5 8.1
Magnetic Permeability 1.003 - - - 1.003 -
Density lb/in³ - - - 0.287 -

Temperature range of 254 SMO seamless pipe

Temperature range of 254 SMO seamless pipe

Temperature Proof strength
°C Rp1.0 Rp0.2
MPa MPa
min. min.
400 190 160
300 200 170
200 225 190
100 270 230
500 180 148

254 SMO pipe application

254 SMO pipe application

Mill Test Certificate (EN 10204 3.1/3.2) Raw Material Certificate Third Party Inspection Report
Heat Treatment Chart Hydrostatic Test Certificate Radiographic Test Report
Ultrasonic Test Report Mechanical Testing Report Visual Inspection Report
Dimensional Inspection Report PMI Test Report (Positive Material Identification) Certificate of Origin

Alloy 254 rectangular pipe corrosion resistance

Alloy 254 rectangular pipe corrosion resistance

Sandvik 254 SMO 425
ASTM TP316 105
'904L' 225

254 SMO stainless steel pipe thermal properties

254 SMO stainless steel pipe thermal properties

W/m o C Temperature, o C Btu/ft h o F Temperature, o F
16 300 9.5 600
18 400 10.5 800
20 500 11.5 1000
10 20 6 68
12 100 7 200
14 200 8 400
21 600 12.5 1200
23 700 13 1300

6MO round pipe modulus of elasticity

6MO round pipe modulus of elasticity

MPa Temperature, °C ksi Temperature, °F
174 300 25.1 600
166 400 23.8 800
195 20 28.3 68
190 100 27.6 200
182 200 27.5 400
158 500 22.5 1000

Heat treatment of SMO 254 EFW pipe

Heat treatment of SMO 254 EFW pipe

Temperature, °C J/kg °C Btu/ft h °F Temperature, °F
400 585 0.14 800
500 600 0.14 1000
600 615 0.15 1200
20 485 0.12 68
100 510 0.12 200
200 535 0.13 400
300 565 0.14 600
700 625 0.15 1400

254 SMO tubing hsn code

254 SMO tubing hsn code

Grade HSN Code
SMO 254 Pipe 73063000

A269 S31254 Erw pipes surface finish

A269 S31254 Erw pipes surface finish

Solution annealed Cold Drawn Mirror
600 grit 400 grit BA polishing
No.4 2B 320 grit
180 grit polished Matt finish Annealed & Pickled

What Is SMO 254 Pipe?

SMO 254 Pipe is manufactured from 254 SMO stainless steel, a highly alloyed austenitic stainless steel commonly identified as UNS S31254.

The material is sometimes described as a 6Mo stainless steel because of its relatively high molybdenum content.

Common designations

  • Material: 254 SMO
  • UNS: S31254
  • Material family: High-alloy austenitic stainless steel
  • Common description: 6Mo stainless steel
  • Product: Pipe
  • Applications: Corrosion-resistant industrial service

254 SMO is particularly considered where conventional grades such as 304L or 316L may not provide sufficient resistance to localized corrosion.

Key Properties of SMO 254 Pipe

SMO 254 provides a combination of corrosion resistance, mechanical performance and fabrication characteristics.

Important properties include:

  • High resistance to pitting corrosion
  • High resistance to crevice corrosion
  • Good resistance to chloride-containing environments
  • Good resistance to stress-corrosion cracking in suitable conditions
  • High molybdenum content
  • High chromium content
  • Nitrogen alloying for improved properties
  • Good general corrosion resistance
  • Good toughness
  • Suitable weldability with appropriate procedures

The actual performance of 254 SMO depends on the operating environment and fabrication condition.

SMO 254 Seamless Pipe

SMO 254 seamless pipe is manufactured without a longitudinal welded seam.

Seamless construction may be selected where required by the application, design or product specification.

When purchasing seamless 254 SMO pipe, confirm:

  • Nominal pipe size
  • Outside diameter
  • Wall thickness
  • Schedule
  • Length
  • Manufacturing specification
  • Heat-treatment condition
  • Surface condition
  • Testing requirements
  • Material traceability
  • MTC requirements

Seamless construction alone does not determine corrosion performance; the alloy grade and complete product specification are equally important.

SMO 254 Welded Pipe

Welded SMO 254 pipe is manufactured by forming stainless steel material and joining the longitudinal seam using an appropriate welding process.

Welded pipe can be considered where specific diameters, dimensions or project requirements make welded construction suitable.

Buyers should confirm:

  • Welding procedure
  • Weld quality requirements
  • Heat treatment
  • Non-destructive examination
  • Dimensional tolerances
  • Applicable product standard
  • Traceability requirements

Pitting Resistance of 254 SMO

One of the major reasons for selecting 254 SMO pipe is its resistance to localized corrosion.

The combination of chromium, molybdenum and nitrogen gives the alloy a high Pitting Resistance Equivalent Number (PREN) compared with conventional stainless steel grades.

This makes 254 SMO a candidate for applications exposed to chloride-containing environments.

However, PREN should not be treated as a guarantee of corrosion performance. Actual service conditions, temperature, concentration, surface condition, welding and contamination can affect corrosion behavior.

Applications of SMO 254 Pipe

SMO 254 pipe is used in applications where high corrosion resistance is an important material-selection requirement.

1. Marine Applications
254 SMO can be considered for selected marine systems exposed to chloride-containing environments.

2. Desalination Plants
Its localized-corrosion resistance makes it suitable for consideration in selected desalination and seawater-related systems.

3. Chemical Processing
Used for selected piping and process equipment exposed to aggressive chemical environments.

4. Pollution Control
Can be considered for flue-gas cleaning and industrial pollution-control systems.

5. Pulp and Paper
Used in selected process environments where corrosion resistance is required.

6. Pharmaceutical Industry
Can be considered for process systems where corrosion resistance and suitable surface requirements are important.

7. Food and Process Industries
Selected applications may use 254 SMO where conventional stainless steel grades do not provide adequate corrosion resistance.

8. Oil & Gas
Can be considered for selected process environments containing chlorides and other corrosive constituents.

How to Select the Right SMO 254 Pipe

Before purchasing, evaluate:

  1. Chemical Environment
    Identify acids, chlorides, seawater, chemicals and contaminants.
  2. Temperature
    Determine normal and maximum operating temperatures.
  3. Pressure
    Specify design pressure and required wall thickness.
  4. Pipe Size
    Specify NPS, outside diameter and wall thickness/schedule.
  5. Manufacturing Method
    Determine whether seamless or welded construction is required.
  6. Surface Condition
    Surface cleanliness and finish can be important in corrosion-sensitive applications.
  7. Welding Requirements
    For welded systems, specify appropriate welding and inspection requirements.
  8. Testing
    Determine whether PMI, NDT, hydrostatic testing or other inspection is required.
  9. Documentation
    Specify MTC and traceability requirements for critical applications.

Frequently Asked Questions About SMO 254 Pipe

SMO 254 pipe is manufactured from 254 SMO high-alloy austenitic stainless steel, commonly identified by UNS S31254.

254 SMO is a highly alloyed austenitic stainless steel developed for demanding corrosion-resistant applications, particularly environments where localized corrosion resistance is important.

Not universally. 254 SMO generally provides higher resistance to localized corrosion than 316L, but 316L may be sufficient and more economical for less aggressive environments.

254 SMO can be considered for selected seawater and marine applications because of its high resistance to localized corrosion. Actual suitability depends on temperature, flow, oxygen content and other conditions.

It offers high resistance to chloride-induced localized corrosion compared with many conventional stainless steel grades, although actual performance depends on service conditions.

Both are high-alloy austenitic stainless steels, but their alloy compositions and typical application strengths differ. 254 SMO is particularly known for high localized-corrosion resistance, while 904L is commonly selected for various aggressive acidic environments.

Yes, 254 SMO can be welded using suitable procedures and appropriate filler materials.

Applications include chemical processing, marine systems, desalination, pollution control, pulp and paper, oil and gas and selected pharmaceutical or process applications.

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