Do you know JIS SPA-C steel mechanical properties

Jan 07, 2026 Leave a message

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.

 

JIS SPA-C steel

 

SPA-C atmospheric corrosion resistance steel plate Chemical composition

 


Grade

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

 


Grade

thickness

yield strength
MPa

tensile strength
MPa

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.

 

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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.