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ASTM A420 WPL6 Butt Welding Pipe Fittings
Views: 13 Author: Site Editor Publish Time: 2023-12-10 Origin: Site
ASTM A420 standard is a standard issued by American Society for Testing and Materials (ASTM), mainly including four grades of materials: WPL6, WPL9, WPL3 and WPL8.This standard is mainly used to standardize the technical requirements for the manufacture, inspection and use of low-temperature carbon steel and low-alloy steel pipe fittings in low-temperature environments, and provides detailed descriptions of the chemical composition, mechanical properties, impact properties, impact test temperature, etc. of low-temperature steel materials.
ASTM A420 WPL6 is currently the most commonly used low-temperature steel material in the butt welding pipe market. It is an alloy steel that is resistant to low-temperature environments, which is composed of a suitable amount of one or more alloying elements added to ordinary carbon steel.ASTM A420 WPL6 material is used to manufacture seamless and straight-weld butt welding pipe fittings. According to the shape and application characteristics of butt welding pipe fittings, it can be divided into: long radius/short radius elbow, equal diameter/reducer tee, equal diameter/reducer cross, concentric/eccentric reducer, pipe cap, flanging nipple, and other types of pipe fittings that can be used in low-temperature pressure pipelines and pressure vessels.
The corresponding American standard steel pipe material standard is ASTM A333 GR6.
Material Properties of ASTM A420 WPL6
Chemical Composition
CHEMICAL
LIMITS
C
Mn
P
S
Si
Ni
Cr
Mo
Cu
Cb
V
ASTM A420 WPL6
MIN
0.50
0.15
MAX
0.30
1.35
0.035
0.040
0.40
0.40
0.30
0.12
0.40
0.02
0.08
Mechanical Properties
MATERIAL
ASTM A420 WPL6
T.S (MPA)
415-655
Y.S (MPA)
240 min
Elongation equirements
WPL6
Longi-tudinal
Trans-verse
Standard round specimen, or small proportionaspecimen, min %e in 4 D
22 min
12 min
Rectangular specimen for wall thickness e in. 0.94mm and over, and for all small sizes tested in fusection: min % o in 2 in. or 50 mm
30 min
16.5 min
Impact Test Performance
Charpy lmpact Requirements for WPL6, WPL9, and WPL3
Size of Specimen (mm)
Charpy V-Notch ImpactValue Required forAcceptance(Average of Three Specimens)
Minimum Charpy V-NotchImpact Value WithoutRequiring Retest(OneSpecimen Only of a Set)
ft.lbf
J
ft.lbf
J
10*10
13
18
10
14
10*7.5
10
14
8
11
10*5.0
7
9
5
7
10*2.5
4
5
3
4
lmpact Test Temperature
GRADE
TemperatureF°[C°]
WPL6
-50[-45]
ASTM A420 WPL6 butt welding pipe fittings, as a low-temperature-resistant, high-quality pipe connection component, have significant advantages in ensuring the long-term stable operation of pipeline systems, and play a vital role in ensuring the safety and reliability of pipelines in the fields of petroleum, chemical, and electric power.
