ASTM A420 WPL8 Low Temperature Buttweld Fittings

ASTM A420 WPL8 Material

ASTM A420 WPL8(9% nickel steel) is a ferritic low-temperature steel with a nickel content of 8.4%-9.6%. It can be used in the range of -320 ℃ to -195℃. It has the characteristics of good low temperature toughness, high strength and good welding performance. It is often used in the manufacture of various kinds of storage tanks or low temperature pipe fittings for liquefied petroleum gas, liquid nitrogen, liquid oxygen, and large-scale liquefied natural gas.

 

We are a manufacturer, supplier and exporter of ASTM A420 WPL8 Pipe Fittings which abide by the specifications of ASTM A420, which include wrought Carbon steel as well as Alloy Steel fittings, of seamless and welded construction.  Workable under temperatures ranging from moderate to elevated, our fittings ensure better performance in the pressure piping and pressure vessel fabrication applications.

We hold a study the on market courses and requirements, to invent new, sustainable and cost-effective 

products able to withstand customization. Our products are 100% durable.

 

ASTM A420 WPL8 Buttweld Fittings Specifications: 

ANSI/ASME B16.9, B16.28, MSS-SP-43.

Standard : ASTM A420 / ASME SA420

ASTM A420 WPL8 Buttweld Fittings Size : 

½”NB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS.

Schedules : Sch.40 to Sch.XXs

Type : Seamless / Welded, Elbow, Tees, Reducers, Caps 

ASTM 420 WPL8 Buttweld Fittings Dimension

ASTM A420 WPL8 Buttweld Fittings Weight

 

ASTM A420 WPL8 Buttweld Fittings Chemical Composition

Chemical Composition of ASTM A420
Elements	WPL6, %	WPL9, %	3.5% Nickel Steel - WPL3, %	9% Nickel Steel WPL8, %
Carbon [C]	≤0.30	≤0.20	≤0.20	≤0.13
Manganese [Mn]	0.50-1.35	0.40-1.06	0.31-0.64	≤0.90
Phosphorus [P]	≤0.035	≤0.030	≤0.05	≤0.030
Sulfur [S]	≤0.040	≤0.030	≤0.05	≤0.030
Silicon [Si]	0.15-0.40	…	0.13-0.37	0.13-0.37
Nickel [Ni]	≤0.40	1.60-2.24	3.2-3.8	8.4-9.6
Chromium [Cr]	≤0.30	...	...	...
Molybdenum [Mo]	≤0.12	...	...	...
Copper [Cu]	≤0.40	0.75-1.25	…	…
Columbium [Cb]	≤0.02	...	...	...
Vanadium[V]	≤0.08	...	...	...

*For grade WPL6, the limit for Columbium may be increased up to 0.05% on heat analysis and 0.06% on product analysis.

*Fittings of WPL3 - 3.5% nickel steel made from plate or forgings may have 0.90 % max manganese.

*Fittings of WPL8 - 9% nickel steel made from plate may have 0.98 % max manganese.

ASTM A420 WPL8 Buttweld Fittings Mechanical Properties

ASTM A420/ A420M	Tensile Strength, min.		Yield Strength, min.		Elongation %, min
Grade	ksi	MPa	ksi	MPa	Longitudinal	Transverse
WPL6	65-95	415-655	35	240	22	12
WPL9	63-88	435-610	46	315	20	…
3.5% Nickel Steel - WPL3	65-90	450-620	35	240	22	14
9% Nickel Steel - WPL8	100-125	690-865	75	515	16	…

*All the elongation values are on the basis of standard round specimen, or small proportional specimen, min % in 4 D. 

ASTM A420 WPL8 Buttweld Fittings Impact Test Properties

Since these pipe fittings are primarily used for low-temperature service, the properties of charpy V-notch impact test must be considered.

Charpy Impact Requirements for WPL6, WPL9, and WPL3
Size of Specimen	A*		B*
mm	ft·lbf	J	ft·lbf	J
10 by 10.0	13	17.6	10	13.6
10 by 7.5	10	13.6	8	10.8
10 by 5.0	7	9.5	5	7.0
10 by 2.5	4	5.4	3	4.1

A*Charpy V-Notch Impact Value Required for Acceptance (Average of Three Specimens)

B*Minimum Charpy V-Notch Impact Value Without Requiring Retest (One Specimen Only of a Set)

Charpy Impact Requirements for WPL8
Size of Specimen	A*		B*
mm	ft·lbf	J	ft·lbf	J
10 by 10.0	25.0	33.9	20.0	27.1
10 by 7.5	21.0	28.5	17.0	23.1
10 by 5.0	17.0	23.1	14.0	19.0
10 by 2.5	8.0	10.8	6.0	8.1

A*Charpy V-Notch Impact Value Required for Acceptance (Average of Three Specimens)

B*Minimum Charpy V-Notch Impact Value Without Requiring Retest (One Specimen Only of a Set)

Impact Test Temperature
Grade	°F [°C]
WPL8