🛠️ High-Precision Japan SS Angles: JIS 4317/4318 Standards 2025/03/14

A Millimeter's Difference: The Attitude of Japanese Manufacturing
Angle steel is a common and practical structural steel. Stainless steel angles, in particular, are widely used in Japanese construction, ports, bridges, and other engineering fields due to their corrosion resistance, dimensional accuracy, and reliability. Japanese industrial culture emphasizes "precision" and "durability," leading to the establishment of the JIS G 4317 / 4318 standards. These standards specifically regulate the materials and specifications of stainless steel angles to ensure stable performance even in harsh environments.  ➤ Introduction to JIS Stainless Steel Angle Standards
 ● JIS G 4317: Stainless Steel Equal Angles
 ● JIS G 4318: Stainless Steel Unequal Angles

 ◈ Common Materials
✔ SUS304: The most common general-purpose corrosion-resistant stainless steel, suitable for construction and general outdoor environments.
✔ SUS316: Contains molybdenum for superior corrosion resistance, ideal for marine, port, and chemical equipment in highly corrosive environments.

 ◈ Key Specification Points
✔ Chemical composition control (proportions of Cr, Ni, Mo, etc.)
✔ Mechanical property requirements (tensile strength, yield point, elongation)
✔ Dimensional accuracy standards (leg length, thickness tolerances, ensuring precise assembly)  ➤  Characteristics of Hot-Rolled Angles
 ● High-temperature rolling process → Releases internal stress, resistant to long-term deformation.
 ● High dimensional stability → Suitable for structural engineering and long-term load-bearing applications.
 ● Excellent corrosion resistance → SUS304 / SUS316 resist moisture, salt, and chemical agents.
👉 Therefore, Japanese hot-rolled stainless steel angles combine strength, durability, and precision, making them the ideal choice for demanding engineering projects.

📐Common Specification Examples (per JIS G 4317 / 4318)

Specification (Leg × Leg × Thickness mm)	Application Examples
30×30×3 mm	Small structures, equipment supports
50×50×5 mm	Building reinforcement, steel frameworks
75×75×6 mm	Machinery requiring corrosion resistance
100×100×10 mm	Large-scale bridges, port facilities, and seismic engineering

👉 These are common specifications. Actual dimensions can be selected based on project requirements and design drawings.

 ➤ Application Fields
Due to their precision, corrosion resistance, and stability, Japanese hot-rolled stainless steel angles are widely used in:
✔ Building steel structures and seismic reinforcement
✔ Machinery equipment and industrial frames
✔ Port facilities, bridges, and power engineering
✔ Solar mounting brackets and outdoor structures  ➤ The Value of Japanese Stainless Steel Angles
The reason Japanese stainless steel angles are favored by engineers is that they simultaneously meet the needs for precision, durability, and construction efficiency:
 ● High dimensional consistency, saving time on assembly
 ● Hot-rolling process ensures long-term stability
 ● SUS304 / SUS316 provide excellent corrosion protection
👉 This pursuit of detail makes Japanese hot-rolled stainless steel angles a symbol of high precision in the Asian market, enhancing structural safety and guaranteeing construction quality. 📞 Contact Information
If you have a need for Japanese hot-rolled stainless steel angles, please feel free to contact Guokai Steel!
📧 Email: sales@guokaisteel.com.tw
📩 Official Line Account: @guokai

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