S355JR steel is a commonly used structural steel with excellent mechanical properties and a wide range of applications. Its main mechanical properties include:
1. Tensile strength: In the tensile test, the tensile strength of S355JR steel is 470-630 MPa.
2. Yield strength: In the tensile test, the yield strength of S355JR steel is 355 MPa.
3. Elongation: In the tensile test, the elongation of S355JR steel is about 22%.
4. Impact toughness: S355JR steel has high impact toughness, usually greater than 27 J at 20℃.
Due to its stable mechanical properties and relatively low cost, S355JR steel is widely used in construction, Bridges, transmission towers, ships, machinery manufacturing and other fields. In construction, S355JR steel is often used to make stairs, handrails, railings and other building parts; In bridge construction, S355JR steel can be used to make structural parts such as bridge beam plates and piers; S355JR steel is also one of the important material choices in the manufacture of transmission tower. Besides, S355JR steel can also be used to manufacture machine parts, oil tank cars, railway freight cars and other industrial products.
The standard for S355JR steel usually varies according to its purpose and country/region. Here are some common criteria:
1. EN10025-2: European standard, technical delivery conditions for non-alloy structural steel.
2. GB/T 1591-2018: China standard, low alloy high strength structural steel.
3. ASTM A572/A572M-18: American standard for high strength low alloy structural steel.
JIS G3606-2008: The Japanese standard is hot-rolled weldable structural steel.
It should be noted that although these standards all cover the production, processing and quality control of S355JR steel, there are some differences among them, and the appropriate standard should be selected according to the actual situation.
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