What Is ASTM A606 Corrosion-Resistant Steel Sheet?
ASTM A606 Corrosion-Resistant Steel Sheet is a high-strength, low-alloy hot-rolled or cold-rolled steel with improved atmospheric corrosion resistance.
When correctly exposed to alternating wet and dry conditions, the alloyed surface gradually develops a dense protective patina that slows further corrosion.
ASTM A606/A606M covers sheet and strip supplied in cut lengths or coils for structural and miscellaneous applications. The standard includes Type 2, Type 4 and Type 5;
ASTM A606 Type 4 weathering steel is a common choice for unpainted architectural, transportation and outdoor fabricated products.
ASTM A606 Weathering Steel Sheet Specification
| ASTM A606 item | Supply specification |
|---|---|
| Standard | ASTM A606/A606M-25 or the edition stated in the order |
| Types | Type 2, Type 4 and Type 5 |
| Product form | Hot-rolled/cold-rolled sheet and strip; cut lengths or coils |
| Typical thickness | Cold rolled: 0.5–3.0 mm; hot rolled: 1.5–10.0 mm, subject to mill availability |
| Typical width | 600–1,900 mm |
| Common cut sizes | 1,219 × 2,438 mm, 1,250 × 2,500 mm and 1,500 × 3,000 mm |
| Surface | Mill finish, pickled, blast-cleaned, pre-rusted or sealed pre-rusted |
Under ASTM A606/A606M-25, hot-rolled cut lengths are covered at ordered thicknesses below 0.230 in. [6.0 mm], while hot-rolled coils may be supplied at 0.230 in. [6.0 mm] and above. Conventional thick structural plate should be checked against ASTM A588, A871 or the project specification.
ASTM A606 Corrosion-Resistant Steel Chemical Requirements
ASTM A606 specifies general chemical limits, while Type 4 and Type 5 use additional alloying elements to achieve superior atmospheric corrosion resistance. The exact Cu-Cr-Ni-Si-P alloy design may vary by mill, so the complete heat analysis should be checked on the MTC.
| ASTM A606 chemical item | Heat analysis | Product analysis |
|---|---|---|
| Carbon, max. | 0.22% | 0.26% |
| Manganese, max. | 1.25% | 1.30% |
| Sulfur, max. | 0.040% | 0.060% |
| Type 4 corrosion-resistance index | Minimum 6.0 according to ASTM Guide G101 | Confirmed by mill chemistry calculation/documentation |
ASTM A606 Weathering Steel Mechanical Properties
| ASTM A606 condition | Minimum yield strength | Minimum tensile strength | Minimum elongation |
|---|---|---|---|
| Hot rolled, as rolled | 50 ksi [340 MPa] | 70 ksi [480 MPa] | 22% |
| Hot rolled, annealed/normalized | 45 ksi [310 MPa] | 65 ksi [450 MPa] | 22% |
| Cold rolled | 45 ksi [310 MPa] | 65 ksi [450 MPa] | 22%* |
*For cold-rolled material not over approximately 1.1 mm, the referenced minimum elongation is 20%.
ASTM A606 Corrosion-Resistant Steel Processing and Testing
GNEE can supply ASTM A606 sheet and coil with slitting, cut-to-length, laser cutting, shearing, perforating, bending, welding, shot blasting and pre-rusting.
Pre-Rusted Corten Steel and Pre-Weathered Corten Steel refer to surface treatments; the substrate must still be certified as ASTM A606.
| ASTM A606 inspection | Available documentation |
|---|---|
| Material verification | Heat number, grade and standard review |
| Chemical/mechanical tests | Heat analysis and tensile results |
| Corrosion performance | ASTM G101 corrosion-index evidence when required |
| Dimensional inspection | Thickness, width, length, flatness and cut-part checks |
| Additional inspection | PMI and SGS/BV third-party inspection by agreement |
Each batch can be supplied with an EN 10204 3.1 MTC or an agreed mill test report. For welded parts, the welding procedure should consider actual chemistry, thickness, service temperature and required weathering appearance.
ASTM A606 Weathering Steel Sheet Applications
ASTM A606 sheet is widely used for architectural façades, roofing, wall panels, screens, fences, containers, railcars, signage, planters and light outdoor structures. It combines high strength, formability, outdoor durability and a natural rust-brown appearance.
Bare ASTM A606 should not automatically be used in continuously wet, buried, marine splash or heavy salt-exposure locations. Such environments may require coatings, improved drainage, corrosion allowance or another material.
| ASTM A606 application | Recommended supply form |
|---|---|
| Façades, screens and signage | Laser-cut or perforated sheet; optional pre-rusting |
| Roofing and cladding | Sheet or slit coil |
| Containers and railcars | Hot-rolled sheet/coil |
| Planters and landscape products | Cut, bent and welded sheet |
ASTM A606 Steel Sheet Weight, Delivery and Inquiry
Theoretical weight is calculated as:
Weight (kg) = thickness (mm) × width (m) × length (m) × 7.85
| ASTM A606 sheet size | Approximate weight |
|---|---|
| 1.5 × 1,219 × 2,438 mm | 35.0 kg/sheet |
| 2.0 × 1,250 × 2,500 mm | 49.1 kg/sheet |
| 3.0 × 1,500 × 3,000 mm | 106.0 kg/sheet |
Stock material may be prepared in about 7–15 days; mill or processed orders commonly require 20–40 days. FOB, CIF and DAP terms are available.
Contact now to get ASTM A606 Steel Sheet Quotation
For a firm quotation, send the ASTM A606 type, hot-rolled/cold-rolled requirement, thickness × width × length or coil data, quantity, tolerance, surface, drawings, MTC/testing requirements and destination.
GNEE can return the material price, processing cost, theoretical weight, packing plan, lead time and landed-delivery option in one quotation.
