S355N S355M High Strength Steel Plate
S355N is a European standard normalized or normalized rolled weldable fine-grain structural steel. The S355N steel plate grade breakdown, S represents the grade of structural steel, 355 indicates that the yield strength of the steel plate is not less than 355MPa, and N indicates that the delivery status of the steel plate is Normalizing or normalizing rolling (default is normalizing rolling), steel plate level delivery quality, quality grade is a minimum impact temperature of not less than -20 degrees, the impact temperature is not represented by English letters or symbols, if the impact temperature is not The minimum impact temperature below -50 degrees is represented by a capital letter L.
S355M is a European standard low-alloy high-strength plate. S355M not only has very high strength but also has certain toughness, wear resistance, fatigue resistance, impact resistance, easy welding processability and wear resistance. It is generally used to manufacture mining machinery. Coal mining machinery, pressure components, cranes, crane equipment, anchors, offshore platforms, bearing seats, etc. are widely used.
s355N 355M high tensile alloy steel chemical composition
| Grade | Ti | Nb | V | C | Si | Mn | P | S | Cr | Ni | Mo | Cu |
| S355M | ≤0.50 | ≤0.50 | ≤0.10 | ≤0.14 | ≤0.50 | ≤1.60 | ≤0.025 | ≤0.020 | ≤0.30 | ≤0.50 | ≤0.10 | ≤0.50 |
| S355N | ≤0.015 | ≤0.05 | ≤0.08 | ≤0.20 | ≤0.50 | ≤1.65 | ≤0.030 | ≤0.025 | ≤0.30 | ≤0.30 | ≤0.10 | ≤0.30 |
S355N S355M High Strength Low Alloy HSLA Steel mechanical property
| Grade |
Tensile Strength(σb/MPa) |
Yield Strength(σb/MPa) | Akv |
| S355M | 470-630 | ≥325 | ≥27J (-20°) |
| S355ML | 470-630 | ≥325 | ≥27J(-50°) |
| S355N | 470-630 | ≥325 | ≥47J(-20°) |
| S355NL | 470-630 | ≥325 | ≥47J(-50°) |
S355N S355M high strength low alloy steel plate product details
S355M steel plate can be attached to the Z-direction performance, Z-direction performance applies to the thickness of 15mm-300mm thickness steel plate, Z-direction refers to the thickness of the steel plate direction performance, you can do the steel plate flaw detection level 1, level 2, level 3 flaw detection, hot or in accordance with the normalised rolled heat treatment state of delivery (normalised rolled steel plate is expressed as S355N, S355NL) to the N to indicate the delivery state of the steel plate, and the same as the M in S355ML.
S355N steel plate Z to performance is the thickness of the steel plate direction performance, Z to performance plate is also known as resistance to laminar tear steel, steel plate Z to performance according to the thickness of the steel plate elongation after break is defined as three levels, Z15, Z25, Z35, the steel plate Z to performance experiments need to be taken three specimens, the steel plate elongation after break is not less than an average of 15%, and a single specimen elongation after break average is not less than 10%, it is consistent with the Steel plate meets the Z performance Z15 level. At the same time, the Z-directional performance also specifies the content of sulfur in the steel plate of harmful elements, Z-directional performance includes three levels of flaw detection.
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