ASTM A420 WPL9 Fittings | ~2.25% Ni, -75°C Service

ASTM A420 WPL9 Pipe Fittings Manufacturer and Supplier in India

ASTM A420 WPL9 Pipe Fittings are pressure piping parts that are made of low-temperature carbon steel for applications that demand high dependability of toughness at ambient temperatures below zero. The nickel content in the WPL9 grade is around 3.0-4.0%, which is responsible for retaining the impact toughness in subzero temperatures. They come in various shapes and forms like elbows, tees, reducers and caps, and are produced to meet specific chemical, mechanical and notch toughness requirements. Their cased manufacture creates a minimal material structure appropriate for connections that can withstand pressure. Solitaire Overseas is an ASTM A420 WPL9 Forged Fittings manufacturer and supplier in India who offer WPL9 forged fittings of various sizes and dimensions as per the project specifications. The fittings can be provided with all the required material testing and documentation for low temperature piping and pressure service applications.

Technical Data

Specifications Chemical Composition Physical Properties Mechanical Properties Equivalent Grades

Specifications of ASTM A420 WPL9 Pipe Fittings

Specification	Details
Standard	ASTM A420 / ASME SA420
Grade	WPL9
Type	Seamless, Welded, Fabricated
Form	Elbows, Tees, Reducers, Caps, Crosses, Stub Ends
Size Range	½” NB to 48” NB
Dimensions	ASME B16.9, ASME B16.28, MSS-SP-43
Thickness	Sch 10s, Sch 20, Sch 40, Sch 80, Sch 160, XXS
Manufacturing Process	Hot Forming / Cold Forming
Application Standard	MSS SP-75, ASME B31.3, B31.1

ASTM A420 WPL9 Pipe Fittings Chemical Compositions

Element	Carbon (C)	Manganese (Mn)	Phosphorus (P)	Sulfur (S)	Silicon (Si)	Chromium (Cr)	Nickel (Ni)	Molybdenum (Mo)
Content (%)	0.20 max	0.30–0.60	0.035 max	0.040 max	0.10–0.35	8.00–10.00	0.50 max	0.90–1.10

Physical Properties of ASTM A420 WPL9 Pipe Fittings

Property	Density	Melting Point	Modulus of Elasticity	Thermal Conductivity	Specific Heat
Value	7.85 g/cm³	1425–1540°C	200 GPa	45 W/m·K	480 J/kg·K

Mechanical Properties of ASTM A420 WPL9 Pipe Fittings

Property	Tensile Strength (min)	Yield Strength (min)	Elongation (min)	Impact Test	Hardness (max)
Value	585 MPa	415 MPa	20%	Passed at -46°C	197 HB

Equivalent Grades of ASTM A420 WPL9 Pipe Fittings

Standard	ASTM	ASME	EN	DIN	JIS
Equivalent Grade	A420 WPL9	SA420 WPL9	P355NL1 / P355NL2	1.0562	SFVC2

Application and Industrial Uses of ASTM A420 WPL9 Pipe Fittings

LNG Plants
LPG Facilities
Cryogenic Storage Facilities
Natural Gas Processing Plants
Industrial Refrigeration Systems
Petrochemical Processing Units
Oil & Gas Pipeline Systems
Low-Temperature Pressure Vessels

Frequently Asked Questions

What is ASTM A420 WPL9 Pipe Fitting?

ASTM A420 WPL9 Pipe Fittings are nickel-alloyed carbon steel fittings designed for low-temperature and pressure-service applications.

What is ASTM A420 WPL9 used for?

They are used in LNG plants, LPG facilities, cryogenic systems, natural gas processing, and petrochemical piping.

Is ASTM A420 WPL9 suitable for low-temperature applications?

Yes. WPL9 is designed to provide good toughness and impact resistance at subzero temperatures.

What is the difference between ASTM A420 WPL9 and WPL8?

WPL8 and WPL9 are ASTM A420 low-temperature grades. WPL8 is designed for deeper cryogenic service, down to about −195°C, while WPL9 is rated to around −75°C.

Why is nickel added to ASTM A420 WPL9?

Nickel improves toughness and impact resistance at low temperatures, making WPL9 suitable for cold-service applications.

Are ASTM A420 WPL9 Pipe Fittings seamless?

They can be manufactured as seamless or welded fittings, depending on the fitting type, size, and applicable manufacturing requirements.