ASTM A847 Corten Steel Pipe With Atmospheric Corrosion Resistance
ASTM A847 Corten Steel Pipe With Atmospheric Corrosion Resistance
Specifications
ASTM A847 is a standard specification for cold-formed welded square and rectangular steel pipe and tubing made of high-strength, low-alloy steel. It is known as a type of weathering steel or Corten steel because it develops a stable, rust-like, and protective layer when exposed to the atmosphere, which significantly enhances its resistance to corrosion compared to carbon steel. This makes it suitable for structures where both high strength and corrosion resistance are required, such as bridges, highway sign structures, and architectural elements.
| American Standard | Standard Name |
| A847/A847M | Standard Specification for Cold-Formed Welded and Seamless High-Strength, Low-Alloy Structural Tubing with Improved Atmospheric Corrosion Resistance |
ASTM A847 Corten Steel Pipe Chemical Composition
Sources American Standard A847/A847M TABLE 2 Chemical Requirements
| Element | Heat Analysis | Product Analysis |
| Carbon, max | 0.2 | 0.24 |
| Manganese, max | 1.35 | 1.4 |
| Phosphorous, max | 0.15 | A |
| Sulphur, max | 0.05 | 0.06 |
| Copper, min | 0.20B | 0.18B |
| A Because of the degree to which phosphorus segregates, product analysis forthis element is not technologically approprate for rephosphorized steels unlessmisapplication is clearly indicated. B if chromium and silicon contents are each 0.50 minimum, then the copperminimums do not apply. |
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ASTM A847 Corten Steel Pipe Mechanical Properties
Sources American Standard A847/A847M TABLE 1 Tensile Requirements for Round and Shaped Tubing
| Tensile Requirements | Strength |
| Tensile strength, min, psi [MPa] | 70 000 [485] |
| Yield strength, min, psi [MPa] | 50 000 [345] |
| Elongation in 2 in. or [50 mm] min, % | 19%A |
| A Applies to specified wall thicknesses 0.1 20 in. [3.0 mm] and over. For lighterwall thicknesses, elongation shall be by agreement with the manufacturer. | |
ASTM A847 Corten Steel Electric-Resistance Welded (ERW) Steel Pipe Manufacturing Process
High-frequency straight seam electric-resistance welded steel pipe(erw steel pipe) is hot-rolled coil after forming machine, the use of high-frequency current skin effect and proximity effects, the tube edge heating and melting, squeeze roller under pressure welding to achieve production.
High-frequency resistance welding steel pipe, welding pipe and ordinary welding process is not the same, the weld is made of the base metal melt from the body, the mechanical strength is better than the general pipe. Smooth appearance, high precision, low cost weld high and small, favorable 3PE anti-corrosion coating. There are significant differences in the welding methods between high frequency welded pipe and submerged arc welded pipe. As the welding is done instantly at high speed, the difficulty of ensuring the quality of welding is much higher than that of submerged arc welding.
ASTM A847 Corten Steel Pipe Application
- Architectural and Structural Applications
- Transportation and Infrastructure
- Industrial and Construction Applications
- Agricultural and Outdoor Use
- Specialized Applications
ASTM A847 Corten Steel Pipe Packing & Loading
- 1/2"-2" Plain end with black oil paint, caps both ends, bundles with loading belt.
- 2"-4" Beveled end with black oil paint, caps both ends, bundles with loading belt.
- 10"-20" Beveled end with black oil paint, caps both ends, loose packed into container.
ASTM A847 Corten Steel Pipe Shipment Reference
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