Kangtao Steel’s BIS-certified carbon steel coils are specialized in weathering (COR-TEN) steel—designed for structural and outdoor applications where corrosion resistance and low maintenance are key. These hot-rolled coils cover a wide range of grades, including Q355NHD, Q460NQR, COR-TEN A/B, and 09CuPCrNiA, complying with international standards like ASTM A588, EN 10025-5, and JIS G3114. BIS certification (India’s Bureau of Indian Standards) ensures the coils meet strict quality and safety benchmarks, making them suitable for global projects. Sizes include width 1000–2000mm, thickness 3–350mm, and length 100–12000mm (customizable).
Kangtao
Building facades, Roofs, Sculptures, Bridges, Railroad cars, Landscape walls, Retaining walls, Landscape bridges
Q355NHD、Q355NHB、Q460NQR、Q500NQR、Q345NHB、Q345NHD、NM400、NM500、09CuPCrNiA、B480GNQR、Q450NQR1、SPAH、Q550NQR1、Q355GNH、Q345GNHL、09CUP、COR-TEN cortenA/corten-A、cortenB/corten-B、C0R-TENA/COR-TENB、Q400NQR1、Q700NQR1
Rust-coloured or as required
1000-2000mm
3-350mm
carbon steel coil
ASTM A588、ASTM A242、EN 10025-5、JIS G3114
Hot Rolled
Steel Coil
100-12000mm
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Unlike ordinary carbon steel, weathering steel forms a dense, adherent rust layer (rust-coloured) when exposed to air and moisture. This layer blocks oxygen and water from reaching the steel core, reducing corrosion by 2–8 times compared to standard carbon steel. No painting or coating is needed—saving time and maintenance costs.
BIS certification guarantees excellent weldability, a critical feature for structural projects like bridges or buildings. The coils can be cut, bent, drilled, and welded without cracking, ensuring strong, durable joints. This makes them ideal for on-site fabrication, even in complex designs.
Hot-rolled processing enhances the coil’s toughness and impact resistance, allowing it to withstand harsh conditions (e.g., heavy rain, strong winds, temperature changes). The coils also have low thermal expansion, reducing warping in extreme weather—perfect for outdoor structures.
Architects often struggle to find materials that combine durability with unique design. Our weathering steel coils solve this: use them for commercial building facades or residential roofs. The natural rust layer adds a rustic, industrial look (similar to the Sydney Opera House’s iconic exterior) while eliminating the need for repainting. For example, a retail store facade made with COR-TEN A coils will develop a rich, uniform rust color over 6–12 months and require no maintenance for decades.
Civil engineers need materials that can handle constant exposure to the elements. These BIS-certified coils are ideal for bridge decks, railroad cars, or ship decks: their weathering resistance prevents rust from weakening the structure, and their toughness absorbs vibration from traffic or waves. Unlike galvanized steel, they won’t peel or chip, reducing repair costs.
Artists creating outdoor sculptures face the challenge of making work that lasts. Our weathering steel coils are easy to shape into intricate designs (thanks to good processability) and will develop a unique rust patina over time—enhancing the sculpture’s aesthetic without degrading it. For example, a park sculpture made with Q355NHD coils will withstand rain, snow, and UV rays for 50+ years with no maintenance.
A: BIS certification ensures the coils meet strict quality, safety, and performance standards—critical for structural projects. It also simplifies import/export to countries that recognize BIS (e.g., India, Southeast Asia).
A: Yes. Grades like 316L or COR-TEN B resist saltwater corrosion. The protective rust layer forms quickly even in coastal environments, preventing damage from sea spray.
A: Yes. We provide free samples, but the freight cost is covered by the customer. The freight cost will be refunded once you place a bulk order.
A: The tolerance is ±1% for both thickness and width, ensuring consistency across your project.
Unlike ordinary carbon steel, weathering steel forms a dense, adherent rust layer (rust-coloured) when exposed to air and moisture. This layer blocks oxygen and water from reaching the steel core, reducing corrosion by 2–8 times compared to standard carbon steel. No painting or coating is needed—saving time and maintenance costs.
BIS certification guarantees excellent weldability, a critical feature for structural projects like bridges or buildings. The coils can be cut, bent, drilled, and welded without cracking, ensuring strong, durable joints. This makes them ideal for on-site fabrication, even in complex designs.
Hot-rolled processing enhances the coil’s toughness and impact resistance, allowing it to withstand harsh conditions (e.g., heavy rain, strong winds, temperature changes). The coils also have low thermal expansion, reducing warping in extreme weather—perfect for outdoor structures.
Architects often struggle to find materials that combine durability with unique design. Our weathering steel coils solve this: use them for commercial building facades or residential roofs. The natural rust layer adds a rustic, industrial look (similar to the Sydney Opera House’s iconic exterior) while eliminating the need for repainting. For example, a retail store facade made with COR-TEN A coils will develop a rich, uniform rust color over 6–12 months and require no maintenance for decades.
Civil engineers need materials that can handle constant exposure to the elements. These BIS-certified coils are ideal for bridge decks, railroad cars, or ship decks: their weathering resistance prevents rust from weakening the structure, and their toughness absorbs vibration from traffic or waves. Unlike galvanized steel, they won’t peel or chip, reducing repair costs.
Artists creating outdoor sculptures face the challenge of making work that lasts. Our weathering steel coils are easy to shape into intricate designs (thanks to good processability) and will develop a unique rust patina over time—enhancing the sculpture’s aesthetic without degrading it. For example, a park sculpture made with Q355NHD coils will withstand rain, snow, and UV rays for 50+ years with no maintenance.
A: BIS certification ensures the coils meet strict quality, safety, and performance standards—critical for structural projects. It also simplifies import/export to countries that recognize BIS (e.g., India, Southeast Asia).
A: Yes. Grades like 316L or COR-TEN B resist saltwater corrosion. The protective rust layer forms quickly even in coastal environments, preventing damage from sea spray.
A: Yes. We provide free samples, but the freight cost is covered by the customer. The freight cost will be refunded once you place a bulk order.
A: The tolerance is ±1% for both thickness and width, ensuring consistency across your project.