Low cost carbon steels are available with different yield strengths. The strength of the material constructed under standard EN 10224 differs on account of its chemistry. Usually, most carbon steel pipes that are manufactured using euro standards like en 10224-2, tend to have designations along with a numerical value assigned to their grade. While the numeric value details the minimum yield strength in N/mm2, the letter is indicative of its application.
In this case grade, L275 means the carbon steel tube is intended for the conveyance of water or some form of aqueous media. Some of the most common grades produced under this standard include L235, L275 & L355. The chemical composition of these three EN 10224 Carbon Steel Seamless Tubes includes manganese, which boosts their mechanical properties. For instance, manganese not only improves the hardness but also aids manufacturers with ease when the en 10224 l275 components are to be formed and shaped. If one compares high carbon steel pipes to a mild or low carbon version such as en 10224 grade l235 pipes, the hardness is much lower. Which is why for demanding uses many buyers prefer their end products to undergo a set of additional processing. For instance, when the en 10224 l355 undergoes processing such as carburization or even nitriding, its hardness increases to a substantial degree. What makes this even better is that the cost of processing low carbon en 10224 l235 pipes is much lower than purchasing a highly alloyed pipe.
| Products | seamless steel pipe |
| Material | carbon steel |
| Technique | hot rolled |
| Outer diameter | 108 mm to 273 mm |
| Wall thickness | 4 mm to 25 mm |
| Length | random or approximate |
| Shape | round |
| Standard | GB/T 8163 |
| Steel grade | 20, Q295, Q345, Q390, Q420, Q460 |
| Surface | bare pipe, or to be painted with black or other color painting, or coated with anti-corrision paint |
| End treatment | plain end, or bevelled end with protecting cap |
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
| max 0.22 | max 0.35 | max 1.60 | 0.04 | 0.04 | – | – | – | – | – |
EN 10224 L235
| Chemical composition | ||||||||||||||||||||||||||||||||||||||||||||||
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| Content in mass-%: |
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| CEV max in %: | - | |||||||||||||||||||||||||||||||||||||||||||||
EN 10224 L275
| Chemical composition | ||||||||||||||||||||||||||||||||||||||||||||||
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| Content in mass-%: |
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| CEV max in %: | - | |||||||||||||||||||||||||||||||||||||||||||||
EN 10224 L355
| Chemical composition | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Content in mass-%: |
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| CEV max in %: | - | |||||||||||||||||||||||||||||||||||||||||||||
| Yield Strength | Tensile Strength | Elongation A5 min | |||
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 500 | 650 | – | 21 | ||
EN 10224 L235
| Mechanical properties | |||||||
|---|---|---|---|---|---|---|---|
| Yield strength Rp0,5 MPa (in PSI): | Min: 235 (34 100)** | Max: - | |||||
| Tensile strength Rm MPa (in PSI): | Min: 360 (52 200) | Max: 500 (72 500) | |||||
| Elongation (% min.): | transverse: 23 | longitudinal: 25 | |||||
Impact strength:
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| Hardness (max. HRC): | - | - | |||||
EN 10224 L275
| Mechanical properties | |||||||
|---|---|---|---|---|---|---|---|
| Yield strength Rp0,5 MPa (in PSI): | Min: 275 (39 900)** | Max: - | |||||
| Tensile strength Rm MPa (in PSI): | Min: 430 (62 400) | Max: 570 (82 700) | |||||
| Elongation (% min.): | transverse: 19 | longitudinal: 21 | |||||
Impact strength:
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| Hardness (max. HRC): | - | - | |||||
EN 10224 L355
| Mechanical properties | |||||||
|---|---|---|---|---|---|---|---|
| Yield strength Rp0,5 MPa (in PSI): | Min: 355 (51 500)** | Max: - | |||||
| Tensile strength Rm MPa (in PSI): | Min: 500 (72 500) | Max: 650 (94 300) | |||||
| Elongation (% min.): | transverse: 19 | longitudinal: 21 | |||||
Impact strength:
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| Hardness (max. HRC): | - | - | |||||
| DIN | EN | BS | NFA | ASTM | ASME |
| – | EN 10224 Grade L355 | – | – | – | – |