ISO Certified Supplier of ASTM A234 WP1/WP5/WP9/WP11/WP22/WP91 Pipe Fittings – All Schedules & Sizes .
ASTM A234 WP1, WP5, WP9, WP11, WP22, and WP91 are specifications for Chrome Moly (Cr-Mo) alloy steel buttweld pipe fittings, designed for use in pressure piping and high-temperature services. These low-alloy steels, enriched with chromium and molybdenum, offer superior mechanical strength, thermal resistance, and corrosion protection compared to carbon steel. These grades are ideal for critical applications in oil & gas pipelines, thermal power plants, petrochemical facilities, and refinery units, where exposure to high temperatures, aggressive media, and stress conditions is common.
We stock and manufacture a complete range of ASTM A234 alloy steel pipe fittings across all mentioned grades, including 90° and 45° elbows, equal/reducing tees, concentric/eccentric reducers, end caps, and stub ends. These fittings are available in both seamless and welded constructions, produced in compliance with ASME B16.9, MSS SP-43, and ANSI B36.10 standards. Sizes range from ½” NB to 36” NB, with wall thicknesses from SCH 10 to SCH XXS. Each grade is either normalized, tempered, or annealed based on specific service requirements to ensure long-term structural integrity.
All our A234 fittings are manufactured under a stringent ISO 9001:2015-certified quality system and are subjected to rigorous quality control checks including PMI testing, hydrostatic testing, ultrasonic inspection, and dimensional verification. Products are supplied with complete EN 10204 3.1/3.2 MTCs, and third-party inspection (TPI) from agencies like BV, Lloyds, SGS, and TUV is available upon request. With global stock points and export-ready inventory, we cater to urgent project needs and shutdown requirements across Asia, the Middle East, Europe, and Africa.
Trusted Stockist of Alloy Steel Fittings (A234 WP1 to WP91) – Buttweld Types: Elbows, Tees, Reducers, Caps, Stub Ends – ASME B16.9, MSS SP-75 – Sizes ½” to 48”, SCH 10 to XXS – ISO Certified Exporter.
Technical Index
Industrial Alloy Steel ASTM A234 WP1 Specifications
| Material Grade | ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91 (Chrome Moly Alloy Steel) |
|---|---|
| Available Product Types | Buttweld Fittings (Elbows, Tees, Reducers, Caps, Stub Ends) |
| Size Range | ½” NB to 24” NB (Seamless), ½” NB to 48” NB (Welded) |
| Wall Thickness | SCH 10, SCH 20, SCH 40, SCH 80, SCH 120, SCH 160, XXS |
| Standard Specifications | ASTM A234 / ASME SA234, ANSI B36.10, B36.19 |
| Manufacturing Standards | ASME B16.9, MSS SP-75, EN 10253, DIN 2605/2615/2616, ISO 3419, JIS B2312 |
| Types | 90° Elbow (LR/SR), 45° Elbow, Equal Tee, Reducing Tee, Concentric Reducer, Eccentric Reducer, End Cap, Stub End |
| Form | Seamless, Welded, Fabricated |
| Heat Treatment | Normalized, Tempered, Quenched & Tempered (as per grade) |
| Mechanical Properties |
Tensile Strength: 415–585 MPa (varies by grade) Yield Strength: 205–415 MPa (varies by grade) Elongation: ≥20% |
| Pressure Ratings | As per ASME B16.9, applicable to SCH & temperature class (up to 500°C or more depending on grade) |
| Testing & Certifications | EN 10204 3.1 & 3.2, NACE MR0175, IBR Approved, PMI, UT, Hydro Test, Radiography, MPT |
| Surface Finish | Black Coated, Anti-Rust Coated, Sand Blasted, Pickled |
| End Connection Types | Beveled Ends (BE), Plain Ends (PE) |
| Manufacturing Capabilities | Hot Forming, Cold Forming, Induction Heating, CNC Beveling, Custom Fabrication |
| Raw Material Sources | India, Japan, South Korea, USA, Germany, Italy |
| Export Destinations | USA, UAE, Saudi Arabia, Qatar, Oman, Kuwait, Egypt, South Africa, Nigeria, Indonesia, Malaysia, Singapore, Europe |
Industrial ASTM A234 Alloy Steel Standards
| ANSI/ASME B16.9 – Factory-Made Wrought Steel Buttwelding Fittings | ANSI/ASME B16.28 – Wrought Steel Short Radius Elbows and Returns | ANSI/ASME B16.25 – Buttwelding Ends(beval standards) | MSS SP-43 – Wrought and fabricated Butt welding Fittings for Light Wall Applications |
| MSS SP-75 – High Test Wrought Butt welding Fittings | DIN 2616 – Butt welding Pipe Fittings: Reducers | DIN 2617 – Butt welding Pipe Fittings: Caps | DIN28011 – Dished Ends(used in pressure vessels) |
| EN10253-1 Butt-welding Pipe Fittings(Non Alloy Steels) | EN10253-2 Butt-welding Pipe Fittings(Stainless/Alloy Steels) |
ASTM A234 Alloy Steel International Standards
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| ASTM A234 WP1 | 1.5415 | K11522 | STPA 20 | 3604 | 12Х1МФ | 15CD2.05 | 16Mo3 |
| ASTM A234 WP5 | 1.7362 | K41545 | STPA 25 | 622-490 | 15Х5М | 15CD5.05 | 13CrMo44 |
| ASTM A234 WP9 | 1.7380 | K90941 | STPA 23 | 622-490 | 15Х9М | 15CD9.05 | 10CrMo9-10 |
| ASTM A234 WP11 | 1.7335 | K11597 | STPA 22 | 621-550 | 12Х1МФ | 15CD2.05 | 13CrMo4-5 |
| ASTM A234 WP22 | 1.7383 | K21590 | STPA 24 | 621-570 | 12Х2М | 15CD2.25 | 10CrMo9-10 |
| ASTM A234 WP91 | 1.4903 | K90901 | STPA 28 | 620-590 | — | Z15CDNbV12.1 | X10CrMoVNb9-1 |
ASTM A234 Alloy Steel Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Other Elements |
|---|---|---|---|---|---|---|---|---|
| ASTM A234 WP1 | 0.10–0.20 | 0.30–0.80 | 0.10–0.50 | ≤ 0.035 | ≤ 0.040 | 0.50–0.80 | 0.40–0.65 | — |
| ASTM A234 WP5 | ≤ 0.15 | 0.30–0.60 | 0.50 max | ≤ 0.030 | ≤ 0.030 | 4.00–6.00 | 0.45–0.65 | — |
| ASTM A234 WP9 | ≤ 0.15 | 0.30–0.60 | 0.25–1.00 | ≤ 0.030 | ≤ 0.030 | 8.00–10.00 | 0.90–1.10 | — |
| ASTM A234 WP11 | 0.05–0.15 | 0.30–0.60 | 0.50–1.00 | ≤ 0.030 | ≤ 0.030 | 1.00–1.50 | 0.44–0.65 | — |
| ASTM A234 WP22 | 0.05–0.15 | 0.30–0.60 | 0.50 max | ≤ 0.025 | ≤ 0.025 | 1.90–2.60 | 0.87–1.13 | — |
| ASTM A234 WP91 | 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | ≤ 0.020 | ≤ 0.010 | 8.00–9.50 | 0.85–1.05 | V: 0.18–0.25, Nb: 0.06–0.10, N: 0.03–0.07 |
Alloy Steel Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HBW) | Temperature Range (°C) |
|---|---|---|---|---|---|
| ASTM A234 WP1 | 380 min | 205 min | 22 min | 163 max | -29 to 427 |
| ASTM A234 WP5 | 415 min | 205 min | 22 min | 163 max | Up to 593 |
| ASTM A234 WP9 | 585 min | 275 min | 20 min | 190 max | Up to 593 |
| ASTM A234 WP11 | 485 min | 275 min | 20 min | 187 max | Up to 593 |
| ASTM A234 WP22 | 620 min | 415 min | 20 min | 190 max | Up to 650 |
| ASTM A234 WP91 | 620 min | 415 min | 20 min | 250 max | Up to 650 |
ASTM A234 Alloy Steel Types
ASTM A234 Chrome Moly Industries & Applications
ASTM A234 Alloy Steel Buttweld Fittings Dimensions
| NOMINAL PIPE SIZE | ALL FITTINGS | ALL FITTINGS | ALL FITTINGS | ELBOWS AND TEES | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS | REDUCERS | CAPS |
|---|---|---|---|---|---|---|---|---|---|
| NPS | O.D. at Bevel (1), (2) | I.D. at End (1), (3), (4) |
Wall Thickness (3) | Centre-to-End Dimension A,B,C,M | Centre-to-Centre O | Back-to-Face K | Alignment of Ends U | Overall Length H | Overall Length E |
| ½ to 2½ | 0.06 -0.03 |
0.03 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 3 to 3 ½ | 0.06 | 0.06 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 4 | 0.06 | 0.06 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 5 to 8 | 0.09 -0.06 |
0.06 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.25 |
| 10 to 18 | 0.16 -0.12 |
0.12 | Not less than 87.5% of nominal thickness | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 20 to 24 | 0.25 -0.19 |
0.19 | Not less than 87.5% of nominal thickness | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 26 to 30 | 0.25 -0.19 |
0.19 | Not less than 87.5% of nominal thickness | 0.12 | … | … | … | 0.19 | 0.38 |
| 32 to 48 | 0.25 -0.19 |
0.19 | Not less than 87.5% of nominal thickness | 0.19 | … | … | … | 0.19 | 0.38 |
ASTM A234 Alloy Steel Thickness Chart
| Product range and theoretical weights (kg) | |||||||||
| DN | Schedule 10S | Schedule 40S | Schedule 80S | ||||||
| 90° Elbow | 45° Elbow | Equal tee | 90° Elbow | 45° Elbow | Equal tee | 90° Elbow | 45° Elbow | Equal tee | |
| 8 | 0.02 | 0.01 | 0.03 | 0.03 | 0.02 | 0.06 | 0.04 | 0.03 | 0.07 |
| 10 | 0.03 | 0.02 | 0.05 | 0.03 | 0.02 | 0.03 | 0.06 | 0.04 | 0.09 |
| 15 | 0.06 | 0.03 | 0.09 | 0.08 | 0.04 | 0.10 | 0.10 | 0.05 | 0.14 |
| 20 | 0.07 | 0.03 | 0.13 | 0.08 | 0.04 | 0.17 | 0.11 | 0.05 | 0.20 |
| 25 | 0.14 | 0.08 | 0.28 | 0.15 | 0.11 | 0.29 | 0.22 | 0.14 | 0.38 |
| 32 | 0.23 | 0.11 | 0.49 | 0.26 | 0.17 | 0.59 | 0.40 | 0.23 | 0.68 |
| 40 | 0.30 | 0.17 | 0.68 | 0.40 | 0.23 | 0.86 | 0.51 | 0.29 | 1.02 |
| 50 | 0.50 | 0.25 | 0.85 | 0.70 | 0.4 | 1.28 | 0.91 | 0.59 | 1.59 |
| 65 | 0.85 | 0.48 | 1.41 | 1.40 | 0.77 | 2.19 | 1.81 | 0.99 | 3.13 |
| 80 | 1.25 | 0.63 | 1.77 | 2.20 | 1.08 | 3.31 | 2.97 | 1.50 | 4.45 |
| 90 | 1.70 | 0.75 | 2.67 | 2.83 | 1.42 | 4.08 | 4.00 | 2.00 | 5.44 |
| 100 | 2.10 | 1.08 | 3.46 | 4.47 | 2.09 | 5.27 | 6.18 | 2.81 | 7.71 |
| 150 | 5.45 | 2.72 | 8.07 | 10.89 | 5.44 | 10.99 | 16.32 | 8.16 | 13.61 |
| 200 | 10.20 | 5.33 | 15.65 | 21.54 | 10.77 | 20.91 | 33.11 | 16.56 | 28.12 |
| 250 | 18.15 | 9.75 | 26.46 | 38.56 | 19.27 | 35.38 | 51.71 | 25.86 | 49.90 |
| 300 | 25.80 | 13.62 | 39.46 | 59.42 | 29.71 | 62.14 | 79.38 | 39.69 | 83.91 |
| Product range and theoretical weights (kg) | |||||||||
| DN | Schedule 10S | Schedule 40S | Schedule 80S | ||||||
| Con reducer | Ecc reducer | Reducing tee | Con reducer | Ecc reducer | Reducing tee | Con reducer | Ecc reducer | Reducing tee | |
| 40x.25 | 0.19 | 0.19 | 0.60 | 0.26 | 0.26 | 0.76 | 0.34 | 0.34 | 0.90 |
| 50×25 | 0.28 | 0.28 | 0.73 | 0.40 | 0.40 | 1.10 | 0.54 | 0.54 | 1.37 |
| 50×40 | 0.31 | 0.31 | 0.76 | 0.45 | 0.45 | 1.15 | 0.59 | 0.59 | 1.43 |
| 80x.50 | 0.55 | 0.55 | 1.56 | 1.00 | 1.00 | 2.91 | 1.79 | 1.79 | 3.91 |
| 100×50 | 0.78 | 0.78 | 2.94 | 1.50 | 1.50 | 4.48 | 1.95 | 1.95 | 6.55 |
| 100×80 | 0.87 | 0.87 | 3.04 | 1.74 | 1.74 | 4.64 | 2.33 | 2.33 | 6.79 |
| 150×80 | 1.82 | 1.82 | 6.86 | 3.95 | 3.95 | 9.68 | 5.51 | 5.51 | 11.57 |
| 150×100 | 1.96 | 1.96 | 7.10 | 4.07 | 4.07 | 11.94 | 5.96 | 5.96 | 11.97 |
| 200×100 | 3.01 | 3.01 | 13.46 | 6.55 | 6.55 | 17.98 | 9.23 | 9.23 | 24.18 |
| 200×150 | 3.19 | 3.19 | 14.08 | 6.74 | 6.74 | 18.82 | 10.12 | 10.12 | 25.31 |
Major Industrial ASTM A234 Alloy Steel Fittings Export Countries
United Arab Emirates (UAE), Jordan, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United States of America (USA), Singapore, Malaysia, Azerbaijan, Armenia, Georgia, Egypt, Algeria, Nigeria, South Africa, Kenya, Morocco, Ethiopia, Ghana, Tanzania, Sudan, Uganda, Angola.