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ASTM A420 WPL6 Butt Welding Pipe Fittings

Views: 12     Author: Site Editor     Publish Time: 2023-12-10      Origin: Site


carbon-steel-pipe-fittingsASTM 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.

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