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ASTM A860 WPHY42-S Wrought High-Strength Ferritic Steel Buttweld Fittings, Equal tee, Elbow, Reducer, ASME B16.9
This product series refers to wrought high-strength ferritic steel butt-welding fittings manufactured in accordance with ASME B16.9 standard, with material designation ASTM A860 WPHY42-S. WPHY is an abbreviation for Wrought Pipe High-Yield, where WP stands for "Wrought Pipefitting" and HY stands for "High Yield Steel." The number 42 in the grade indicates that the material's minimum yield strength is 42 ksi (approximately 290 MPa).
This material corresponds to API 5L pipeline steel grade X42, achieving strength matching between fittings and main pipes in piping systems and eliminating weak points in the system. ASTM A860 standard covers six strength grades: WPHY42, WPHY46, WPHY52, WPHY60, WPHY65, and WPHY70, corresponding to API 5L pipeline steel grades X42 to X70, respectively.
The fittings under this material are suitable for pipeline systems in oil, chemical, natural gas, and other industries, offering excellent strength, low-temperature impact toughness, and weldability, thus meeting the requirements for pipeline connections under high pressure and severe service conditions.
1.Chemical & Mechanical Properties
ASTM A860 WPHY42-S Chemical Composition (%)
|
| C |
Mn |
P |
S |
Si |
Ni
|
Cr |
Mo |
Cu |
Ti |
V |
Co |
Al |
V+Co |
| ≤0.02 |
1.00-1.45 |
≤0.030 |
≤0.010
|
0.15-0.40
|
≤0.50 |
≤0.30 |
≤0.20 |
≤0.35 |
≤0.05 |
≤0.10 |
≤0.04 |
≤0.06 |
≤0.12 |
Mechanical Properties
| Yield Strength (0.2% offset) |
Tensile Strength |
Elongation, % in 4D |
Elongation, % in 2 inch |
| ≥290 MPa |
≥415 MPa |
25 |
32 |
2. Key Adventages
- Excellent Low-Temperature Toughness: Meets impact toughness requirements at -46°C (10×10mm specimen, average impact energy ≥ 40J).
- Carbon equivalent (CE) ≤ 0.42%, low carbon design provides good weldability without requiring complicated preheating or post-heating procedures, facilitating field installation and construction.
- Suitable for high-pressure piping systems, capable of withstanding significant mechanical loads and internal pressure.
- Low carbon, low sulfur, low phosphorus, and the addition of micro-alloying elements (Nb, V, Ti) refine the grain structure, improving overall mechanical properties and resistance to hydrogen-induced cracking.
- Design temperature range from -50°F (-46°C) to 500°F (260°C) (per ASME B31.3), covering most service conditions in conventional industrial piping.
3. Key Applications
- High-pressure oil and gas transmission pipelines
- Offshore and onshore oil and gas field gathering and transportation systems
- Petrochemical industry process piping systems
- Power plant piping systems
- Long-distance pipeline projects
ASTM A860 / ASME SA860 Fittings Information
Range : ½”NB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS
Variants : Carbon Steel Pipe Fittings
Type : Seamless / Welded / Fabricated
Bending Radius : R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Dimensions : ANSI/ASME B16.9, B16.28, MSS-SP-43
Grades : WPBW, WPHY 42, WPHY 46, WPHY 52, WPHY 60, WPHY 65 & WPHY 70
TEST
- Heat Treatment (By one of the methods of normalizing, quenching, tempering or stress relieving)
- Radiographic Examination
- Ultrasonic Test
- Charpy V-Notch Test
- Hardness Test
- Liquid Penetrant / Magnetic Particle Examined(Butt-weld tees manufactured by cold forming process)
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