A420 low-temperature steel cross tee, allowing fluids to be transported from one point to another. As a fundamental piping connection component, it features , through which fluids can enter or exit the pipeline.
ASTM A420, developed by the American Society for Testing and Materials (ASTM), is a standard specification for butt-welded wrought carbon steel and alloy steel pipe fittings for low-temperature service. The core objective of this standard is to ensure that fittings possess sufficient toughness, strength, and sealing properties in cryogenic environments, preventing material embrittlement or structural failure caused by sudden temperature drops. It clearly defines key requirements, including the chemical composition, mechanical property requirements, manufacturing process specifications, dimensional tolerances, nondestructive testing methods, and labeling and packaging requirements for fittings. Its applicable temperature range reaches -45℃, covering most industrial cryogenic service requirements. It also provides detailed specifications for design pressures and connection methods, providing comprehensive technical guidance for manufacturers and users.
Material grades of ASTM A420
The ASTM A420 standard covers a variety of carbon steel and alloy steel grades suitable for low-temperature environments. These grades are divided into WPL3, WPL6, WPL9, WPL11, WPL12, WPL22, etc. according to their chemical composition and mechanical properties. Among them, WPL6 is one of the most widely used materials.
Chemical composition of WPL6 Cross
| C | P | S | V | |||||||||
| ASTM A420 WPL6 | 0.50 | 0.15 | ||||||||||
| 0.30 | 1.35 | 0.035 | 0.040 | 0.40 | 0.40 | 0.30 | 0.12 | 0.40 | 0.02 | 0.08 |
Mechanical properties of WPL6 Cross
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ASTM A420 WPL6 |
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T.S (MPA) |
415-655 |
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Y.S (MPA) |
240 min |
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ASTM A420 WPL6 |
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Longi-tudinal |
Trans-verse |
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Standard round specimen, or small proportionaspecimen, min %e in 4 D |
22 min |
12 min |
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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 performance of WPL6 Cross
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Charpy lmpact Requirements for WPL6, WPL9, and WPL3 |
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Charpy V-Notch ImpactValue Required forAcceptance(Average of Three Specimens) |
Minimum Charpy V-NotchImpact Value WithoutRequiring Retest(OneSpecimen Only of a Set) |
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ft.lbf |
J |
ft.lbf |
J |
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10*10 |
13 |
18 |
10 |
14 |
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10*7.5 |
10 |
14 |
8 |
11 |
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10*5.0 |
7 |
9 |
5 |
7 |
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10*2.5 |
4 |
5 |
3 |
4 |
GNEE ASTM A420 WPL3 WPL6 Cross
