S420N S420NL High Strength Low Alloy Plates
S420N low alloy steel material has high steel strength, and because it belongs to the European steel plate grade, so it is also known as the European standard S420N high-strength steel plate.S420N high strength low alloy steel plate yield strength needs to reach greater than or equal to 420 MPa; S420N steel plate tensile strength needs to reach greater than or equal to 520 to 680 MPa between; S420N high strength low alloy plate elongation needs to reach 19%; S420N high strength steel plate is still a wide range of applications, can be used in the manufacture of pressure vessels, construction machinery and so on.
S420NL high tensile steel plate belongs to the European standard under the steel plate grade, in the S420NL high strength alloy steel plate added a small amount of alloying elements within the steel plate, so that the steel plate has a high strength, so it is known as low alloy high-strength steel plate. S420NL HSLA steel plate using normalised or hot rolled heat treatment process state delivery, the general requirements of the steel plate is not high if the hot rolled on it, but some of the engineering or parts on the steel plate But some projects or parts of the steel plate requirements are relatively high, it is necessary to use the heat treatment process of normalising. Normalising is a heat treatment process to improve the toughness of the steel plate, not only to improve the strength of the steel plate can also improve the toughness.
S420N hSLA structural steel chemical composition
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Al | Cu | CEV |
| max 0.2 | max 0.6 | 1 - 1.7 | max 0.8 | max 0.03 | max 0.025 | max 0.3 | max 0.1 | max 0.2 | max 0.025 | max 0.05 | max 0.05 | max 0.02 | max 0.55 | max 0.52 |
S420NL low alloy structural steel chemical composition
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Al | Cu | CEV |
| max 0.2 | max 0.6 | 1 - 1.7 | max 0.8 | max 0.025 | max 0.02 | max 0.3 | max 0.1 | max 0.2 | max 0.025 | max 0.05 | max 0.05 | max 0.02 | max 0.55 | max 0.52 |
S420N high strength sheet metal mechanical property
Mechanical properties of S420N steel plate:
| Grade | Thickness(mm) | Yield strength ReH(MPa) | Tensile strength Rm(MPa) | Elongation A% | Impact temperature ℃ | Impact energy Akv(J) |
| S420N | ≤16 | ≥420 | 520-680 | ≥19 | -20 | ≥40 Longitudinal; Horizontal: Akv≥20J |
| >16-40 | ≥400 | |||||
| >40-63 | ≥390 | |||||
| >63-80 | ≥370 | ≥18 | ||||
| >80-100 | ≥360 | |||||
| >100-150 | ≥340 | 500-650 | ||||
| >150-200 | ≥330 | |||||
| >200-250 | ≥320 |
S420NL high strength structural steel mechanical property
| Thickness (mm) | ||||||||
| S420NL | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 200 | > 200 |
| Yield strength (≥Mpa) | 420 | 400 | 390 | 370 | 360 | 340 | 330 | 320 |
| ≤ 100 | > 100 ≤ 200 | > 200 | ||||||
| Tensile strength (Mpa) | 520-680 | 500-650 | 500-650 | |||||
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