ASTM A860 WPHY 46

ASTM A860 WPHY 46 Pipe Fittings

ASTM A860 WPHY 46 is a high-strength carbon steel designed for use in high-pressure and high-temperature pipeline systems. With a minimum yield strength of 46,000 psi (317 MPa), WPHY 46 is ideal for demanding applications in the oil & gas, petrochemical, and power generation industries. It is well-suited for environments that require high durability, impact toughness, and excellent weldability.

Key Features:

High Yield Strength: ASTM A860 WPHY 46 provides a minimum yield strength of 46,000 psi (317 MPa), making it perfect for high-pressure systems where strength is essential to ensure safety and durability.
Weldability: WPHY 46 features excellent weldability, which ensures reliable and strong welded joints. This property is essential for creating long, continuous pipeline systems without sacrificing performance.
Impact Toughness: The material maintains impact toughness even at low temperatures (down to -50°F / -45°C), ensuring structural integrity in harsh and cold environments.
Corrosion Resistance: WPHY 46 offers moderate resistance to corrosion, making it suitable for marine, offshore, and subsea pipeline applications exposed to saltwater and other environmental factors.
High-Temperature Strength: WPHY 46 is designed to withstand elevated temperatures, making it ideal for high-temperature steam lines and other applications where heat resistance is critical.
Cost-Effective: As a carbon steel alloy, WPHY 46 offers a cost-effective solution for demanding pipeline applications, with a balance of strength, toughness, and affordability.

Applications:

Oil & Gas: WPHY 46 is widely used in pipelines for crude oil, natural gas, and other hydrocarbons, both onshore and offshore.
Petrochemical: It is used in petrochemical refineries and chemical process pipelines where pressure resistance and high strength are necessary.
Power Generation: High-strength steam lines in power plants, where WPHY 46 helps maintain system efficiency under high-pressure and high-temperature conditions.
Offshore & Marine: WPHY 46 is ideal for offshore pipelines that require resistance to both high-pressure and marine corrosion.
Water Treatment: It is also suitable for water and wastewater treatment pipelines, where durability and mechanical strength are critical.
Infrastructure: Large-scale construction projects involving reliable and strong pipeline systems benefit from the use of WPHY 46.

A860 WPHY 46 Material Equivalent

Standard	Country	Grade
ASTM A860	USA	WPHY 46
EN 10208-2	Europe	L320NB / L320MB
DIN EN 10208-2	Germany	StE 320.7 TM / L320NB
JIS G3444	Japan	STK 490
IS 2062 / IS 3589	India	E300 / Fe 410 WB
GOST 19281	Russia	17G1S-U / 10G2S1

A860 WPHY 46 Mechanical Properties

Property	Value
Yield Strength	46,000 psi (317 MPa) minimum
Tensile Strength	70,000 – 90,000 psi (483 – 620 MPa)
Elongation (in 8 in.)	20% minimum
Impact Toughness	Average of 20 ft-lb (27 J) at -50°F (-45°C)
Hardness	190 HB max (Brinell hardness)

A860 WPHY 46 Chemical Composition

Element	Composition (%)
Carbon (C)	0.26 max
Manganese (Mn)	1.35 – 1.65
Phosphorus (P)	0.025 max
Sulfur (S)	0.025 max
Silicon (Si)	0.15 – 0.40
Chromium (Cr)	0.40 max
Nickel (Ni)	0.40 max
Molybdenum (Mo)	0.12 max
Copper (Cu)	0.40 max
Vanadium (V)	0.08 max
Aluminum (Al)	0.04 – 0.10

A860 WPHY 46 Physical Properties

Property	Value
Density	7.85 g/cm³
Modulus of Elasticity	200 GPa (29,000 ksi)
Poisson’s Ratio	0.3
Thermal Conductivity	45 W/m·K
Specific Heat	0.46 J/g·K
Melting Point	1,370 – 1,420°C (2,500 – 2,590°F)
Coefficient of Thermal Expansion	11.5 x 10⁻⁶ /°C (6.4 x 10⁻⁶ /°F)
Hardness (Brinell)	190 HB max

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