Premium Alloy Steel Buttweld Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a trusted manufacturer, exporter, and supplier of Alloy Steel Buttweld Pipe Fittings, engineered to deliver superior strength and reliability in high-pressure and high-temperature applications. Manufactured using premium alloy steel grades containing chromium, molybdenum, and other alloying elements, these fittings offer enhanced mechanical properties and excellent resistance to wear, oxidation, and creep.
Alloy Steel Buttweld Pipe Fittings are designed to perform efficiently under extreme operating conditions involving elevated temperatures and pressures. They exhibit excellent toughness, fatigue strength, and weldability, ensuring long-term structural integrity in critical piping systems. Precisely machined bevel ends provide strong, leak-proof welded joints and smooth flow characteristics, reducing maintenance requirements.
Extensively used in power plants, oil & gas refineries, petrochemical industries, thermal pipelines, boilers, and pressure vessels, our alloy steel buttweld fittings conform to international standards such as ASTM, ASME, and DIN. Choose Ratnadeep Steel & Engg. Co. for high-performance alloy steel buttweld pipe fittings that offer durability, safety, and cost efficiency in demanding industrial environments.
- Alloy Steel 90 Deg Elbow
- Alloy Steel 45 Deg Elbow
- ASTM A234 WP1 Alloy Steel 180 Deg Elbow
- WP5 SR Elbow
- B16.9 Alloy Steel 90 Degree Short Radius Elbow
- AS A234 WP9 45 Deg Long Radius Elbow
- ASME B16.9 Alloy Steel Equal Tee
- ASTM A234 Alloy Steel Pipe Tee
- Alloy Steel A234 WP1 Butt weld Tee
- Alloy Steel Reducing Tee manufacturer
- Alloy Steel Unequal Tee
- Alloy Steel Straight Tee
- ASTM A234 Alloy Steel Eccentric Reducer Supplier
- B16.9 AS Eccentric Reducer
- ASTM / ASME A/SA234 WP1, WP5, WP9, WP11, WP22, WP91
- ANSI B16.9 Alloy Steel Concentric Reducer Supplier
- A234 WP5 Concentric Reducer
- ASTM A234 WP9 Alloy Steel Concentric Reducers
- Alloy Steel A234 WP1 Concentric Reducer
- ANSI / ASME B16.9 Alloy Steel Long Stub End Supplier
- Alloy Steel Lap Joint Stub End
- ASTM A234 WP1 Long Stub Ends
- Chrome Moly WP5 Long Stub End
- A234 WP9 Cr-Mo Long Stub End
- B16.9 Alloy Steel Short Stub End Supplier
- ASTM / ASME A/SA234 WP1, WP5, WP9, WP11, WP22, WP91
- ASTM A234 Chrome Moly Short Stub End Exporter
- ASTM A234 WP1 Alloy Steel Pipe Cap Supplier
- ASME B16.9 Alloy Steel End Pipe Cap
- Alloy Steel A234 WP5 Pipe End Cap
- Alloy Steel Buttweld Cap
- ASTM A234 WP9 Cap
- Alloy Steel End Cap
- Alloy Steel Equal Cross
- ASME B16.9 Alloy Steel Buttweld Cross
- ASME SA234 Alloy Steel Unequal Cross
- Alloy Steel Reducing Cross Exporter
- A234 WP1, WP5, WP9, WP11, WP22, WP91 Cross
- ASTM A234 WP1 Pipe Bend Exporter
- B16.9 Alloy Steel Piggable Bend
- SA234 Alloy Steel U Bend
- Alloy Steel Long Radius Bend
- Chrome Moly Alloy Steel Buttweld Bend Supplier
CHEMICAL COMPOSITION OF ALLOY STEEL BUTTWELD PIPE FITTINGS
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni | V |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A234 WP1 | 0.10-0.20 | 0.30-0.80 | 0.045 max | 0.045 max | 0.15-0.40 | 0.15 max | 0.44-0.65 | 0.15 max | – |
| ASTM A234 WP5 | 0.15 max | 0.30-0.60 | 0.040 max | 0.030 max | 0.50 max | 4.0-6.0 | 0.45-0.65 | 0.50 max | – |
| ASTM A234 WP9 | 0.15 max | 0.30-0.60 | 0.030 max | 0.030 max | 0.50-1.00 | 8.0-10.0 | 0.90-1.10 | 0.40 max | – |
| ASTM A234 WP11 | 0.05-0.15 | 0.30-0.60 | 0.030 max | 0.030 max | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 | 0.50 max | – |
| ASTM A234 WP22 | 0.05-0.15 | 0.30-0.60 | 0.040 max | 0.040 max | 0.50 max | 1.90-2.60 | 0.87-1.13 | 0.50 max | – |
| ASTM A234 WP91 | 0.08-0.12 | 0.30-0.60 | 0.020 max | 0.010 max | 0.20-0.50 | 8.0-9.5 | 0.85-1.05 | 0.40 max | 0.18-0.25 |
MECHANICAL PROPERTIES OF ALLOY STEEL BUTTWELD PIPE FITTINGS
| Grade | Tensile (ksi) | 0.2% Yield (ksi) | Elongation % | Hardness (HB) |
|---|---|---|---|---|
| ASTM A234 WP1 | 55-80 | 30 min | 22 min | 143 max |
| ASTM A234 WP5 | 60-85 | 30 min | 22 min | 149 max |
| ASTM A234 WP9 | 60-85 | 30 min | 22 min | 149 max |
| ASTM A234 WP11 | 60-85 | 30 min | 22 min | 149 max |
| ASTM A234 WP22 | 60-85 | 30 min | 22 min | 149 max |
| ASTM A234 WP91 | 85-110 | 60 min | 20 min | 250 max |
Specification of Alloy Steel Buttweld Fittings
| Specifications | ASTM/ASME A/SA234 WP1, WP5, WP9, WP11, WP22, WP91 |
|---|---|
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size | Seamless Butt Weld Fittings: ½” to 10″ | Welded Butt Weld Fittings: ½” to 48″ |
| Schedule | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Type | Seamless / ERW / Welded / Fabricated |
| Thickness | 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc. |
ALLOY STEEL BUTTWELD FITTINGS EQUIVALENT GRADES
| STANDARD | UNS | EN | DIN | JIS | BS |
|---|---|---|---|---|---|
| ASTM A234 WP1 | K11522 | 1.7335 | 13CrMo4-5 | STPA 23 | BS 3604: 620-440 |
| ASTM A234 WP5 | K41545 | 1.7362 | 10CrMo9-10 | STPA 25 | BS 3604: 621 |
| ASTM A234 WP9 | K81590 | 1.7380 | X12CrMo9-1 | STPA 26 | BS 3604: 625 |
| ASTM A234 WP11 | K11597 | 1.7383 | 13CrMo4-5 | STPA 24 | BS 3604: 620-440 |
| ASTM A234 WP22 | K21590 | 1.7386 | 10CrMo9-10 | STPA 24 | BS 3604: 622 |
| ASTM A234 WP91 | K91560 | 1.4903 | X10CrMoVNb9-1 | STPA 28 | BS 3604: 660 |
PHYSICAL PROPERTIES OF ALLOY STEEL BUTTWELD FITTINGS
| Property | ASTM A234 WP1/WP11 | ASTM A234 WP5/WP9/WP22 | ASTM A234 WP91 |
|---|---|---|---|
| Density @ Room Temperature | 0.284 lb/in³ (7.85 g/cm³) | 0.284 lb/in³ (7.85 g/cm³) | 0.284 lb/in³ (7.85 g/cm³) |
| Elastic/Young’s Modulus | 29.0 × 10⁶ psi (200 GPa) | 29.0 × 10⁶ psi (200 GPa) | 29.0 × 10⁶ psi (200 GPa) |
| Specific Heat @ 20°C (68°F) | 0.108 Btu/lb/°F (452 J·kg⁻¹·°K⁻¹) | 0.108 Btu/lb/°F (452 J·kg⁻¹·°K⁻¹) | 0.108 Btu/lb/°F (452 J·kg⁻¹·°K⁻¹) |
| Melting Point | 2600°F to 2750°F (1425°C to 1510°C) | 2550°F to 2700°F (1400°C to 1480°C) | 2600°F to 2750°F (1425°C to 1510°C) |
| Thermal Conductivity @ 20°C (68°F) | 285 Btu·in/h·ft²·°F (41.2 W·m⁻¹·°K⁻¹) | 280 Btu·in/h·ft²·°F (40.5 W·m⁻¹·°K⁻¹) | 260 Btu·in/h·ft²·°F (37.6 W·m⁻¹·°K⁻¹) |
| Electrical Resistivity @ 20°C (68°F) | 0.160 μΩ·m | 0.170 μΩ·m | 0.180 μΩ·m |
| Mean Coefficient of Thermal Expansion (20-100°C) | 6.5 × 10⁻⁶ °K⁻¹ | 6.0 × 10⁻⁶ °K⁻¹ | 6.0 × 10⁻⁶ °K⁻¹ |
| Maximum Service Temperature | 900°F (480°C) | 1100°F (595°C) | 1200°F (650°C) |
💡 Practical Difference in Use
Use Alloy Steel Buttweld Pipe Fittings when: high strength, elevated temperature resistance, and superior pressure-handling capability are required in critical piping systems. Alloy steel fittings contain alloying elements such as chromium and molybdenum, which enhance creep resistance, toughness, and durability under extreme operating conditions. → Example: power plants, refineries, petrochemical units, boilers, pressure vessels, and thermal pipelines.
Applications of Alloy Steel Buttweld Pipe Fittings
Alloy steel buttweld fittings are engineered for reliable performance in high-temperature and high-pressure industrial environments.
- Power & Energy: Boiler piping, superheater lines, and steam systems.
- Oil & Petrochemical: Refineries, cracking units, and process pipelines.
- Heavy Engineering: Pressure vessels and thermal equipment.
When to Choose Alloy Steel?
Alloy steel is ideal for applications that demand enhanced mechanical properties and resistance to high temperatures.
Choose Alloy Steel when:
- High-temperature and high-pressure service conditions exist
- Resistance to creep, fatigue, and thermal stress is critical
- Long service life in demanding environments is required
- Strength and toughness are more important than corrosion resistance
- Used in power plants, refineries, and heavy industrial systems
Industries That Use Alloy Steel Buttweld Pipe Fittings
Alloy steel fittings are widely used in industries operating under extreme temperature and pressure conditions.
Designed for high-temperature steam and boiler systems.
Uses
Boiler piping, superheaters, and steam transmission lines.
Why Alloy Steel?
Excellent thermal stability and creep resistance.
Suitable for high-pressure process pipelines.
Uses
Refineries, hydrocarbon processing, and cracking units.
Why Alloy Steel?
High strength and resistance to extreme operating conditions.
Used in pressure-intensive equipment.
Uses
Pressure vessels, heat exchangers, and thermal systems.
Why Alloy Steel?
Superior mechanical strength and long service life.
Usage Guide for Alloy Steel Buttweld Pipe Fittings
Directional flow change in high-pressure and high-temperature piping systems.
Choose Elbow when
- 45°, 90°, or 180° directional change is required
- Operating pressure and temperature are high
- Strength and creep resistance are critical
- Used in power plants, refineries, and oil & gas pipelines
Strong branch connections in pressure-intensive industrial piping.
Choose Tee when
- Branch or flow distribution is required
- High mechanical strength is needed
- System operates under pressure and heat
- Used in petrochemical and thermal plants
Prevents air pockets and maintains stable flow in horizontal pipelines.
Choose Eccentric Reducer when
- Installed on horizontal piping or pump suction lines
- Flow stability is essential
- High-pressure service conditions exist
- Used in refinery and oil & gas piping
Uniform diameter transition in vertical or pressurized pipelines.
Choose Concentric Reducer when
- Vertical pipeline alignment is required
- Uniform pressure distribution is important
- High-temperature service conditions exist
- Used in boilers and pressure vessel piping
Facilitates dismantling in high-pressure lap joint assemblies.
Choose Long Stub End when
- Frequent inspection or maintenance is required
- Large-diameter or high-pressure pipelines are used
- Combined with lap joint flanges
- Installed in refinery and power plant piping
Compact lap joint solution for limited-space installations.
Choose Short Stub End when
- Installation space is limited
- Economical lap joint connections are required
- Moderate pressure piping systems are used
- Installed in industrial process pipelines
Securely seals pipe ends in high-pressure piping systems.
Choose Pipe Cap when
- Pipe ends require permanent or temporary closure
- Pressure testing is performed
- High strength and durability are required
- Used in industrial and power generation piping
Multi-directional flow distribution in complex piping networks.
Choose Cross when
- Four-way branch connections are required
- High-pressure service conditions exist
- Strong welded joints are critical
- Used in refinery and petrochemical plants
Large-radius bends for smooth flow in high-pressure systems.
Choose Pipe Bend when
- Gradual directional change is required
- Pressure drop must be minimized
- High-temperature service is involved
- Used in power, oil & gas, and refinery piping
Our Buttweld Pipe Fittings are manufactured using advanced processes and undergo extensive quality checks to ensure flawless weldability, durability, and long service life. Each fitting is thoroughly inspected using key NDT techniques such as radiographic testing (RT), ultrasonic testing (UT), hydrostatic testing, and visual/dimensional examination. We also perform detailed chemical composition analysis and mechanical property testing to ensure material compliance with strict industry standards.
Throughout the forming and welding stages, every buttweld fitting is monitored closely to eliminate defects such as misalignment, surface irregularities, and wall-thickness variations. This ensures perfect joint integrity and high-performance reliability in pipelines carrying high temperatures, pressures, and corrosive media. All our buttweld fittings fully comply with ASME, ASTM, MSS-SP, and related global specifications, making them a preferred choice for critical piping systems worldwide.
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