ASTM A420 WPL3 is the deep cryogenic Low Temperature Carbon Steel grade — impact tested at -73°C (-100°F). The nickel addition (1.6–2.24%) is essential for maintaining toughness at these extreme tempe...
ASTM A420 WPL3 is the deep cryogenic Low Temperature Carbon Steel grade — impact tested at -73°C (-100°F). The nickel addition (1.6–2.24%) is essential for maintaining toughness at these extreme temperatures. Mandatory for LNG service, liquid nitrogen piping, and cryogenic process systems operating below the WPL6 rating of -46°C. Used at LNG export and import terminals worldwide.
| Property | Value |
|---|---|
| Grade | LTCS WPL3 |
| ASTM / ASME | ASTM A420 WPL3 |
| UNS Number | — |
| Chromium (Cr) | — |
| Nickel (Ni) | 1.60–2.24% |
| Molybdenum (Mo) | — |
| Temp Rating | -73°C min |
| Fitting Standard | ASME B16.9 / MSS SP-43 |
| Size Range | ½" NB to 48" NB |
| Certificate | EN 10204 3.1 MTC |
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