API 5L X42 welded steel pipe demonstrates outstanding service efficiency and durability in energy transmission, thanks to its balanced mechanical properties and optimized manufacturing processes. As a basic grade product under the API standard, X42 achieves a yield strength of 290 MPa and a tensile strength range of 415-655 MPa. Coupled with the standard's stringent control over chemical composition (carbon equivalent ≤ 0.25%), it maintains a Charpy impact energy of over 27J even at -20°C, meeting the typical operational requirements for medium and low-pressure natural gas transmission in Class II and III onshore regions.
API 5l Grade X42 Pipse Chemical Compatibility Chart
| X42 PSL1 | X42 PSL2 | |||||||
|---|---|---|---|---|---|---|---|---|
| Grade | P | C | S | Mn | P | C | S | Mn |
| X42 | 0.03 | 0.26 | 0.03 | 1.30 | 0.025 | 0.22 | 0.015 | 1.40 |
X42 Steel Pipes Minimum Yield Strength Chart
| Pipe Grade | Tensile Strength - X42 Pipe Body of Seamless and Welded Pipes PSL 1 | SMLS of X42 Welded Pipe | ||
|---|---|---|---|---|
| Yield Properties a | Tensile Properties a | Elongational | Tensile Properties b | |
| Rt0,5 PSI Min | Rm PSI Min | (in 2in Af % min) | Rm PSI Min | |
| X42 | 42,100 | 60,200 | c | 60,200 |
| Pipe Grade | Tensile Strength - X42 Pipe Body of SMLS and Welded Pipes PSL 2 | Seam of X42 Welded Pipe | |||||
|---|---|---|---|---|---|---|---|
| Yield Properties a | Tensile Properties a | Ratio a,c | Elongational | Tensile Properties d | |||
| Rt0,5 PSI Min | Rm PSI Min | R10,5IRm | (in 2in) | Rm (psi) | |||
| Af % | |||||||
| X42, X42R, X2Q, X42M | 42,100 | 71,800 | 60,200 | 95,000 | 0.93 | f | 60,200 |
What is the API 5L X42 equivalent material
API 5L X42 equivalent materials are primarily defined by their minimum yield strength (290 MPa or 42 ksi) and include EN 10208-2 L290NB, ISO 3183 L290, and GB/T 9711 L290, with ASTM A106 Gr. B and A53 Gr. B also considered close alternatives for certain applications, though they are different standards for seamless (A106) and general use (A53) pipes.
Which is better, API 5L X42 or API 5L GRB
| Property | API 5L X42 | API 5L GR.B |
|---|---|---|
| Strength | Yield Strength ≥ 290 MPa | Yield Strength ≥ 245 MPa |
| Toughness | Mandatory ≥27J @ -20°C impact energy | No low-temp toughness requirement |
| Composition Control | Mandatory addition of Nb/V microalloying elements | Microalloying elements optional |
| Applicable Pressure | Medium-high pressure (>8 MPa) | Low pressure (≤6 MPa) |
| Lifecycle Cost | More economical in sour gas/low-temp environments | 5-8% lower purchase price in ambient/clean conditions |
