SPA-H steel material can be produced as SPA-H steel plate, SPA-H steel sheet, SPA-H steel bar, SSPA-H section steel, SPA-H structural shapes.And GNEE STEEL can offer JIS G3125 Corten Steel SPA-H Equivalent grade A588,HW350,ASTM A242 (COR-TEN A), ASTM A588 (COR-TEN B), S355J2WP+N, S355J2W+N, S355JOWP, S355JOW, S355J2W, 1.8946, 1.8965.
SPA-H steel also known as SPA-H weathering steel,atmospheric corrosion-resistant steel.
SPA-H belongs to weathering steel, specifically designed to withstand atmospheric corrosion, commonly used in applications such as containers. SPA-H weathering steel exhibits excellent resistance to atmospheric corrosion and possesses characteristics like high temperature resistance, abrasion resistance, formability, fatigue resistance, strength, toughness, and ductility. It can be used exposed, reduced in thickness, or with simplified coating.
SPA-H is a type of weathering steel designated by the Japanese grade SPA-H. It conforms to the Japanese standard JIS G3125-2004 "High Weatherability Rolled Steel." Steel plates for containers typically have a yield strength of approximately 300 MPa. SPA-H weathering steel, with its composition including reasonable additions of Cu, P, Cr, and Ni to low-carbon steel, achieves a yield strength ranging from 390 to 439 MPa. This steel exhibits strong corrosion resistance and is suitable for manufacturing containers. In container manufacturing, structural components and outer panels are often made using hot-rolled thin steel plates with compressive strength levels above 345 MPa, ensuring excellent atmospheric corrosion resistance.
JIS G 3125 SPA-H corten steel specifications
THICKNESS (mm): 2.5mm~25mm
WIDTH (mm) : 50mm~2500mm
AVAILABLE PROCESS: Dry, pickled and oiled
AVAILABLE FORM: Coil, Strap, Plate, Sheet, Circle, Laser/plasma cut and more.
SPA-H corten steel Equivalents：
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
SPA-H Weathering Alloy Steel Chemical Composition (%)
| Grade | C | Si | Mn | P | S | Cr | Cu | V | Ni |
| Corten A | 0.12 | 0.25-0.75 | 0.20-0.50 | 0.07-0.15 | 0.030 | 0.50-1.25 | 0.25-0.55 | – | 0.65 |
| SPA-H | 0.12 | 0.20-0.75 | 0.60 | 0.07-0.15 | 0.035 | 0.30-1.25 | 0.25-0.50 | – | 0.65 |
SPA-H Weathering resistant steel mechanical properties:
| Grade | Plate Thickness | Yield strength | Tensile strength | elongation |
| SPA-H | 6.0mm max | min 345 MPa | min 480 MPa | min22 |
| 6.0mm min | min 335 MPa | min 490 MPa | min 15 |
Why is SPA-H Weathering Steel More Durable?
SPA-H weathering steel, also known as atmospheric corrosion-resistant steel, is a low-alloy steel that offers superior durability compared to ordinary carbon steel. Its unique composition, which includes copper and other corrosion-resistant elements such as phosphorus, chromium, nickel, titanium, and vanadium, enhances its resistance to atmospheric corrosion.
Key Properties of SPA-H Weathering Steel:
Corrosion Resistance: SPA-H weathering steel has corrosion resistance that is 2 to 8 times greater than that of ordinary carbon steel. This makes it particularly suitable for environments with harsh weather conditions or exposure to corrosive elements.
Mechanical Strength: In addition to its corrosion resistance, SPA-H weathering steel retains the mechanical properties of ordinary steel, such as ease of extension, high strength, and excellent fatigue resistance.
Because of these properties, SPA-H weathering steel is often used in applications where both corrosion resistance and structural strength are critical.
Applications: SPA-H weathering steel is typically used in demanding environments, such as in the construction of containers, railway vehicles, oil derricks, drilling platforms, and other structures exposed to extreme conditions.
Cost Consideration: Despite its advantages, SPA-H weathering steel is more expensive than regular steel, with costs being around 60% higher. This price premium is justified by its longer service life and reduced maintenance requirements in environments where traditional carbon steel would corrode quickly.
Key Applications Of SPA-H weathering steel
Bridge Structures:
SPA-H weathering steel is commonly used in the construction of bridges and other large infrastructure projects. Its ability to withstand complex loads and resist corrosion from varying weather conditions makes it an ideal material for these critical structures.
Containers and Storage Tanks:
Thanks to its superior weather and corrosion resistance, SPA-H weathering steel is frequently used in the manufacturing of containers, storage tanks, and other storage equipment. It ensures long-term durability in environments exposed to the elements, minimizing the need for frequent maintenance.
Vehicle Components:
SPA-H weathering steel is also utilized in the production of structural components for various types of vehicles, including cars, trains, and ships. Its strength, combined with resistance to environmental wear, provides enhanced safety and longevity for transportation equipment.
Building Exterior Decoration:
With its distinctive appearance and resistance to atmospheric corrosion, SPA-H weathering steel is increasingly used in architectural applications, particularly for building facades and exterior wall cladding. Its rusted, yet aesthetically appealing finish adds a unique, weathered look to modern buildings.
Construction Machinery:
SPA-H weathering steel is highly suitable for manufacturing structural components of construction machinery and equipment. It can withstand the heavy loads and tough working conditions typical in construction sites, ensuring durability and extended service life.
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