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:

ElementMinMax
Silicon (Si)0.15000.6500
Sulfur (S)-0.0350
PhOsphorus (P)-0.0350
Nickel (Ni)0.05000.3000
Manganese (Mn)-1.4000
Copper (Cu)0.30000.5000
Chromium (Cr)0.45000.7500
(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/Ku32(J)
ElongationA12%
Reduction in cross section on fractureZ13%
As-Heat-Treated ConditionSolution 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)21666187
Modulus of elasticity (GPa)-111-
Mean coefficient of thermal expaion ×10-6/(°C)--12
Thermal conductivity (W/m·°C)-24.311.2
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.