Views: 11 Author: Site Editor Publish Time: 2023-11-21 Origin: Site
ASTM A860 is a standard specification for high-strength ferritic steel materials, mainly for butt welding fittings.ASTM A860 butt welding fittings connects pipes together through welding and is suitable for high-temperature and high-pressure working environments.It is mainly used in petroleum and natural gas pipeline systems.
What Is ASTM A860 Specification
ASTM A860 is a standard developed by the American Society for Testing and Materials (ASTM) for butt-welding fittings.The standard covers aspects such as materials, properties, manufacturing, inspection, and marking to ensure the quality and performance of butt-welding fittings meet the design requirements of pipelines.
Types, Dimension,Material And Manufacturing Process
There are many types of ASTM A860 butt welding fittings ,such as 90deg/45deg elbow、bend、equal/reducing tee、cross、reducer、cap，stub end etc.These fittings can meet different pipeline layout and connection requirements。
A860 butt welding fittings dimensional requirements for 14" and smallerbutt-welding fittings are provided in ASME B16.9.Dimensional requirements for butt-welding fittingslarger than 14: through 48" are provided by MSS-SP-75.
These standards specify the dimensions, tolerances, materials, and testing requirements for butt-welding fittings to ensure their quality and applicability to piping systems with various design requirements.
Grades: | ASTM A860 WHPY42,46,52,60,65,70 |
Outer Diameters: | 1/2" to 14" in ASME B16.9;14" to 48" in MSS-SP-75 |
Wall Thickness Schedule: | SCH 10, SCH 40, SCH 160 comply with ASME B16.9 |
Pressure Class: | Class 150, 300, 600, 900, 1500, 2500 |
Manufacturing Standards: | ASME B16.9, ASME B16.28, MSS-SP-75 |
Coatings: | 3LPE, FBE, Zinc Coated, PTFE, HDPE, Fiber-Glass |
ASTM A860 butt welding fittings material includs grade WPHY42、WPHY46、WPHY52、WPHY60、WPHY65、WPHY70.Which corresponding to the API 5L Pipe standard X42 to X70.
Chemical Composition：
CHEMICAL | LIMITS | C | Mn | P | S | Si | Cu | Ni | Cr | Mo | V | Ti | Al | Cb |
ASTM A860 | MIN | 1.00 | 0.15 | |||||||||||
MAX | 0.20 | 1.45 | 0.030 | 0.010 | 0.40 | 0.35 | 0.50 | 0.30 | 0.25 | 0.10 | 0.05 | 0.06 | 0.04 |
A: The carbon equivalent calculated by the following formula, shall not exceed 0.42%.
CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
B: If vacuum carbon deoxidation is used, silicon shall not exceed 0.10% by heat analysis and 0.12% by product analysis.
C: Ni + Cr + Mo + Cu shall not exceed 1.0%.
Mechancal Properties：
MATERIAL | WPHY42 | WPHY46 | WPHY52 | WPHY60 | WPHY65 | WPHY70 |
T.S (MPA) | 415 min | 435 min | 455 min | 515 min | 530 min | 550 min |
Y.S (MPA) | 290 min | 315 min | 360 min | 415 min | 450 min | 485 min |
EL % | 25 min | 25 min | 25 min | 20 min | 20 min | 20 min |
Impact Test：
Toughness Cenergy absorption measured at -50“F[-46C] | ||
Size, mm | Average/min, ftlbs[J] | Lateral Expansion min,MLS(mm) |
10X10 | 30/25[40/34] | 25[0.64] |
10X7.5 | 25/21[34/28] | 21 [0.53] |
10X5 | 20/17[27/23] | 13 [0.33] |
Hardness:
Fittings under ASTM A860 shall have a maximum hardness of 22 HRC (235 HBW).
Heat Treatment
ASTM A860 butt welding fittings shall be heat treated. Fittings that are formed above transformation temperature or made by welding, shall be cooled down to critical temperature before heat treatment. The methods include normalizing, quenching, tempering or stress relieving under the specification of ASTM A960/960M.
914X12.7mm 90DEG BEND ASTM A860 WPHY 52 supplied to Canada
Advantages
Compressive strength
Corrosion resistance
Wide applications
Highly durable
Long service life
Various types
ASTM A860 butt welding fittings has a wide range of butt welding pipe types and sizes, which can meet the needs of different fields and applications, and is therefore widely used in various pipeline systems.
