JIS SPA-C steel is a cold-rolled atmospheric corrosion-resistant steel with excellent heat resistance, manufactured according to JIS G3125. It is specifically engineered to withstand the corrosive effects of rain, snow, ice, fog, and other harsh meteorological conditions, making it ideal for outdoor and industrial applications.

SPA-C atmospheric corrosion resistance steel plate Chemical composition
|
|
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Cu |
|
SPA-C |
≤0.12 |
≤0.6 |
0.007-0.15 |
≤0.035 |
0.25-0.75 |
≤0.65 |
0.30-1.25 |
0.25-0.55 |
SPA-C atmospheric corrosion resistance steel plate Mechanical property
|
|
thickness |
yield strength |
tensile strength |
elongation |
bending |
|
|
Bending Angle |
The inside of the radius |
|||||
|
SPA-C |
|
≥315 |
≥450 |
26 |
180o |
0.5T |
These properties ensure that SPA-C steel maintains both strength and ductility, even under challenging environmental conditions.
Products Applications
Due to its superior atmospheric corrosion resistance, JIS SPA-C steel is widely used in a variety of industries, including:
Construction & Infrastructure: Air preheaters, economizers, bridges, and building structures
Transportation: Railway carriages and container manufacturing
Industrial Equipment: Storage tanks, pipelines, and other outdoor equipment
The outstanding corrosion resistance of JIS SPA-C steel significantly reduces the need for painting and costly rust-prevention maintenance over time, lowering long-term maintenance costs while maintaining structural integrity.

What is SPA-C corten weathering steel plate equivalent grades
The equivalent grades of SPA-C corten weathering steel plate include HW350, SPA-H JIS G3125, ASTM A242 (COR-TEN A), ASTM A588 (COR-TEN B), S355J2WP+N, S355J2W+N, S355JOWP, S355JOW, S355J2W, 1.8946, 1.8965, SAILCOR IRSM41-97.
What is SPA-C weathering steel?
SPA-C is a type of atmospheric corrosion-resistant steel (Corten steel) designed for long-term outdoor exposure. It forms a stable, protective rust layer that prevents further corrosion, reducing maintenance needs.
What are the main applications of SPA-C steel?
SPA-C is commonly used for architectural facades, outdoor sculptures, bridges, retaining walls, garden landscapes, and industrial equipment where durability and aesthetics are important.
Can SPA-C steel be welded or processed?
Yes. SPA-C can be cut, welded, bent, and formed using standard steel processing methods. Preheating may be recommended for thick plates to avoid welding cracks.
Where can I buy SPA-C steel?
SPA-C steel is available from specialized steel suppliers and distributors. GNEE offers a wide range of SPA-C products in various sizes and forms.







