Stainless Steel 6MO Buttweld Fittings are high-alloy super austenitic stainless steel pipe fittings designed for excellent corrosion resistance in chloride-rich and highly aggressive environments. ASTM A403 SMO 254 / 6MO Industrial Pipe Fittings are widely used in offshore, marine, desalination, chemical processing, and petrochemical industries due to their superior resistance to pitting, crevice corrosion, and stress corrosion cracking. These fittings are available in elbows, tees, reducers, stub ends, and pipe caps manufactured according to ASME/ANSI B16.9 and B16.28 standards.
Table of Contents
- ➤ Introduction to SS 6MO Buttweld Fittings?
- ➤ What Are Stainless Steel 6MO Buttweld Fittings?
- ➤ Key Features of 347H Buttweld Fittings?
- ➤ Types of 347H Buttweld Fittings?
- ➤ Monel 401 Specification
- ➤ Chemical Composition of Alloy 401 Flanges
- ➤ Mechanical Properties of Monel 401 Flanges
- ➤ Weight Chart of Monel 401 Flanges
- ➤ Advantages of 401 flange
- ➤ Applications of ASTM B564 Monel 401 Flanges
- ➤ Why Choose Our Monel 401 Flanges?
- ➤ Quality Assurance & Testing
What are Stainless Steel 6MO Buttweld Fittings?
SS 6MO Buttweld Fittings are produced from super austenitic stainless steel with approximately 6% molybdenum. These fittings are designed for essential uses where normal stainless steels would not perform under high chloride exposure and corrosive process conditions.
The material is also known as 6MO or SMO 254 or UNS S31254 stainless steel. It has excellent mechanical strength and corrosion resistance because to its high nickel, chromium and molybdenum composition.
We manufacture and supply a wide range of:
- 90 Degree Elbows
- 45 Degree Elbows
- Long Radius Elbows
- Short Radius Elbows
- Equal & Unequal Tees
- Eccentric & Concentric Reducers
- Stub Ends
- Pipe Caps
- Crosses
- Pipe Bends
These fittings are installed by welding, which ensures a permanent, leak-proof, and strong connection in piping systems.
Key Features of Stainless Steel 6MO Buttweld Fittings
- High Molybdenum Content – Provides excellent resistance to pitting & crevice corrosion
- Chloride Resistance – Withstands aggressive chloride-containing environments like seawater
- Strength & Durability – High mechanical properties make them suitable for high-pressure systems
- Weldability – Easy to fabricate, weld, and install in various systems
- Cost-Effective – Long service life reduces maintenance and replacement costs
Types of 6MO Buttweld Pipe Fittings
At Solitaire Fittings, we manufacture and supply a wide range of SMO 6MO Buttweld Pipe Fittings, each serving different purposes in piping systems:
➤ ASTM A403 SMO 254 / 6MO Industrial Pipe Fittings
ASTM A403 SMO 254 fittings are extensively used in industries handling seawater, acidic chemicals, and chloride-containing solutions. These fittings offer excellent weldability and fabrication characteristics
➤ ASME/ANSI B16.28 SS 6MO Pipe Fittings
ASME/ANSI B16.28 SS 6MO Pipe Fittings are manufactured for short radius elbows and long radius return bends suitable for high-pressure industrial piping systems.
➤ ASME SA403 SS 6MO Buttweld Pipe Fittings
ASME SA403 SS 6MO Buttweld Pipe Fittings are produced under strict quality standards to ensure high resistance against localized corrosion and oxidation.
➤ 6MO Welded Pipe Fittings
6MO Welded Pipe Fittings are fabricated using high-quality welded pipes and are widely preferred for large diameter industrial applications.
➤ Werkstoff No 1.447 SMO Buttweld Tee
Werkstoff No 1.447 SMO Buttweld Tee is commonly used to divide or combine fluid flow in aggressive chemical and marine processing systems.
➤ ASME SA403M 6MO Pipe Cap
ASME SA403M 6MO Pipe Caps are designed to close pipeline ends securely in high-pressure and corrosive process industries.
Applications of 6MO SS Welded Pipe Fittings
Stainless Steel 6MO Buttweld Fittings are widely used in industries where high corrosion resistance and mechanical strength are essential:
- Marine Industry – Seawater piping, shipbuilding, desalination plants
- Oil & Gas Industry – Offshore drilling, pipelines, and refining equipment
- Chemical Processing – Acid handling, chemical reactors, storage tanks
- Power Generation – Cooling systems, heat exchangers, and boiler feedwater lines
- Pulp & Paper Industry – Bleaching equipment exposed to chlorides
Schedule and Size Chart – Stainless Steel 6MO Buttweld Fittings
| Nominal Pipe Size (NPS) | Outside Diameter (OD) (mm) | Wall Thickness – SCH 10S (mm) | Wall Thickness – SCH 40S (mm) | Wall Thickness – SCH 80S (mm) | SCH 160 (mm) | XXS (mm) |
|---|---|---|---|---|---|---|
| ½” (15 mm) | 21.3 | 2.11 | 2.77 | 3.73 | 4.78 | 7.47 |
| 1” (25 mm) | 33.4 | 2.77 | 3.38 | 4.55 | 6.35 | 9.09 |
| 2” (50 mm) | 60.3 | 2.77 | 3.91 | 5.54 | 8.74 | 11.07 |
| 3” (80 mm) | 88.9 | 3.05 | 5.49 | 7.62 | 11.13 | 14.27 |
| 4” (100 mm) | 114.3 | 3.05 | 6.02 | 8.56 | 13.49 | 17.12 |
| 6” (150 mm) | 168.3 | 3.40 | 7.11 | 10.97 | 18.26 | 21.95 |
| 8” (200 mm) | 219.1 | 3.76 | 8.18 | 12.70 | 23.01 | 28.58 |
| 10” (250 mm) | 273.0 | 4.19 | 9.27 | 15.09 | 28.58 | 35.05 |
| 12” (300 mm) | 323.9 | 4.57 | 9.53 | 17.48 | 33.32 | 38.10 |
Mechanical Properties of Stainless Steel 6MO (UNS S31254)
| Property | Value (Typical) |
|---|---|
| Tensile Strength (MPa) | 650 MPa minimum |
| Yield Strength 0.2% (MPa) | 300 MPa minimum |
| Elongation (%) | 35% |
| Hardness (Brinell HB) | ≤ 223 HB |
| Impact Strength (Charpy V) | Excellent toughness at room and sub-zero temperatures |
Chemical Composition – Stainless Steel 6MO (ASTM A403 SMO 254 / UNS S31254)
| Element | Content % |
|---|---|
| Carbon (C) | ≤ 0.020 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.010 |
| Silicon (Si) | ≤ 0.80 |
| Chromium (Cr) | 19.5 – 20.5 |
| Nickel (Ni) | 17.5 – 18.5 |
| Molybdenum (Mo) | 6.0 – 6.5 |
| Nitrogen (N) | 0.18 – 0.22 |
| Iron (Fe) | Balance |
Physical Properties – Stainless Steel 6MO (SMO 254)
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1320 – 1390 °C |
| Thermal Conductivity (at 20 °C) | 12 W/m·K |
| Electrical Resistivity (at 20°C) | 0.92 μΩ·m |
| Specific Heat (20°C – 100°C) | 500 J/kg·K |
| Modulus of Elasticity | 195 GPa |
Specifications Chart – ASTM A403 SMO 254 / 6MO Industrial Pipe Fittings
| Specifications | ASTM A403, ASME B16.9, MSS-SP-43, DIN 2605, DIN 2615, DIN 2616, DIN 2617 |
|---|---|
| Grades | SMO 254 / 6MO (UNS S31254), SS UNS S30400, DIN 1.4301 |
| Sizes | ½” NB to 48” NB (Seamless & Welded) |
| Schedule | SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, XXS |
| End Types | Beveled, Plain End, Butt Weld |
| Forms | Elbow, Tee, Reducer, Stub End, Cap, Cross |
| Surface Finish | Pickled, Annealed, Polished |
| Origin | Indian & Imported Raw Material |
Advantages of Using Stainless Steel 6MO Buttweld Fittings
- Resistance to seawater corrosion and chloride attack
- Long-lasting performance in harsh industrial environments
- Reliable and leak-proof welded connections
- Suitable for both high-temperature and cryogenic conditions
- Reduced downtime and maintenance costs
Related Stainless Steel Fittings
- SS 304 Buttweld Fittings
- SS 316 Buttweld Fittings
- Stainless Steel 321 Fittings
- SS 310 Buttweld Fittings
- SS 347 Buttweld Fittings
- SS 317 Buttweld Fittings
Why Choose Solitaire Fittings for Stainless Steel 6MO Buttweld Fittings?
As a leading 6MO Buttweld Pipe Fittings Exporter and Manufacturer, Solitaire Fittings stands out for:
- Quality Assurance – Products tested as per international standards
- Wide Range – From 6MO Buttweld Elbows to ASME B16.9 SS Long Stub Ends
- Global Supply – Exporting to Asia, Middle East, Europe, and USA
- Competitive Pricing – Best value for high-performance fittings
- Customization – Tailored sizes, shapes, and thicknesses available
Solitaire Fittings – Trusted 6MO Buttweld Pipe Fittings Exporter
With years of expertise, Solitaire Fittings has built a reputation as a trusted SS 6MO Pipe Fittings Manufacturer & Exporter. We deliver products that adhere to ASTM A403 SMO 254 / 6MO Industrial Pipe Fittings specifications, ensuring safety, reliability, and longevity in industrial operations.
Whether you need 6MO Buttweld Pipe Fittings for a large offshore project or specialized DIN 1.4301 Stainless Steel Butt Weld Fittings for industrial applications, Solitaire Fittings is your one-stop solution.
Frequently Asked Questions
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