ST52-3 and S355J2 are both structural steel grades used in various applications, but they have distinct differences in their chemical composition, mechanical properties, and applications:
ST52-3
Chemical Composition:Carbon (C): 0.20% maxSilicon (Si): 0.50% maxManganese (Mn): 1.60% maxPhosphorus (P): 0.035% maxSulfur (S): 0.035% max
Mechanical Properties:Tensile Strength: 490-630 MPaYield Strength: 355 MPa (min)Elongation: 22% (min)
Applications:ST52-3 is primarily used for welded, riveted, or bolted construction of bridges, buildings, and other structural components where high strength and excellent weldability are required.
S355J2
Chemical Composition:Carbon (C): 0.20% maxSilicon (Si): 0.55% maxManganese (Mn): 1.60% maxPhosphorus (P): 0.025% maxSulfur (S): 0.025% max
Mechanical Properties:Tensile Strength: 450-680 MPaYield Strength: 355 MPa (min)Elongation: 20% (min)
Applications:S355J2 is a European standard structural steel grade that is used in general construction and engineering structures. It is known for its high strength, excellent weldability, and good toughness at low temperatures.
Comparison
Chemical Composition: Both grades have similar carbon content but differ slightly in other alloying elements, which can affect their mechanical properties and suitability for different applications.
Mechanical Properties: ST52-3 has a slightly higher tensile strength range, while S355J2 has a broader range and may exhibit better toughness properties, especially at low temperatures.
Applications: ST52-3 is more specialized for structural components requiring high strength and weldability, whereas S355J2 is versatile and widely used in various structural applications due to its good combination of strength and toughness.
In summary, while both ST52-3 and S355J2 are structural steel grades with similar yield strengths, their differences in chemical composition and mechanical properties make them suitable for distinct applications in construction and engineering.
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FAQ
Q: What is the ST52 of S355?
A: St52 = S355 = 1.0570
This steel grade has a higher yield point and maximum tensile strength than the traditional St37 steel grade. Characteristics: a typical steel plate pre-treated with a zinc coating.
Q: Does S355 steel rust?
A: S355J2 steel has moderate corrosion resistance in atmospheric conditions, making it suitable for outdoor structures. However, it is not recommended for direct exposure to seawater or other highly corrosive environments.
Q: What is ST52-3 grade steel?
A: ST52-3 grade steel is a readily weldable low carbon manganese steel with good impact resistance (including in sub-zero temperatures). This material is commonly supplied in the untreated or normalised condition.
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
