JIS G3114 SMA490BW Introduce
The Japanese Industrial Standard JIS G3114 is an essential standard for steel plate and related products in the Japanese steel market. It is the result of many years of research and discussions among experts in the materials and ceramic industry, and it has become the basis for all other steel standards in the world. The JIS G3114, which was established in 1980, is a steel standard that covers steel plates and supplies as well as dedicated steel products for all industrial purposes. It aims to improve the operational conditions and efficiency of production, as well as ensuring the quality of all steel products manufactured. The standard also tries to keep a close control of steel production, making it possible to classify and identify different types of steel.
Smelting temperature:1395°C - 1981°C
Application:Hot rolled atmospheric corrosion resistant welded structural steel
JIS G3114 SMA490BW Material Chemical Composition
The chemical composition of the JIS G3114 SMA490BW steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.6500 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | 0.0500 | 0.3000 |
| Manganese (Mn) | - | 1.4000 |
| Copper (Cu) | 0.3000 | 0.5000 |
| Chromium (Cr) | 0.4500 | 0.7500 |
| (CEV) | - | 0.4100 |
| Carbon (C) | - | 0.1800 |
JIS G3114 SMA490BW Material Mechanical Properties
JIS G3114 SMA490BW steel has a wide range of chemical compositions depending on grade, ranging from very low carbon contents to high-manganese contents. Low-carbon grades have poor weldability, but are tougher and more resistant to corrosion. High-manganese grades have improved weldability in addition to enhanced strength and corrosion resistance.
The mechanical properties of the JIS G3114 SMA490BW steel are as follows:
| YieldRp0.2 | ≤ 297 (MPa) |
| TeileRm | ≤ 321 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 134 |
JIS G3114 SMA490BW Material Thermal Properties
The thermal performance parameters of the JIS G3114 SMA490BW steel are as follows:
| Temperature (°C) | 21 | 666 | 187 |
| Modulus of elasticity (GPa) | - | 111 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 423 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 223 |
| Poisson’s coefficient, ν | - | - | 433 |
JIS G3114 SMA490BW Material Machining Technology
JIS G3114 SMA490BW steel is one of the most commonly used steels in Japan and is known for its high tensile strength, toughness and excellent fatigue properties, making it ideal for machining. It is a low-alloy steel with low carbon content and is usually supplied in the normalized condition. As JIS G3114 SMA490BW steel is relatively heat-treatable, it is relatively easy to machine although higher cutting speeds are required for good results, especially for difficult operations.