WEATHERING STEEL · PLATE & SHEET · INTERNATIONAL INQUIRIES
SHANDONG DAZHIWEATHERING STEEL
STANDARDS WATCH / OCTOBER 2026

ASTM A606/A606M-25: specify the type and product form

The current A606/A606M edition identifies Types 2, 4 and 5. For a buyer, the practical question is whether the offer names the correct type and arrives in a form that the standard covers.

Representative weathering steel plate surface; image does not establish an ASTM A606 type

Representative material image. Material identity must be confirmed by order documents.

What the current public scope says

ASTM lists A606/A606M-25 as the active edition for high-strength, low-alloy sheet and strip with improved atmospheric corrosion resistance. Its public scope identifies Type 2, Type 4 and Type 5. The designation also covers different rolled forms and delivery conditions; a request for “A606 plate” without form and thickness can create a mismatch before price is discussed.

This is a standards-watch note published in October 2026. It does not claim that every type was introduced in 2025 or that a particular mill has all three types in stock.

Three decisions to make before comparing offers

DecisionWhy it matters
Type 2, 4 or 5?Each type has its own requirements; the type should match the drawing and the inspection documents.
Sheet, strip or coil?The A606 scope depends on rolled form and ordered thickness. Confirm the form before applying the designation.
Bare or coated service?Exposure and detailing affect the material choice. Unpainted performance should be reviewed for the actual site.

The public standard summary describes Type 2 as copper-bearing and Types 4 and 5 as containing additional alloying requirements. It discusses bare use for Types 4 and 5 under suitable exposure. These points are a starting framework, not a substitute for the purchased standard or a project engineer’s approval.

What to put in an A606 RFQ

  • State ASTM A606/A606M, the edition and Type 2, 4 or 5 on each line.
  • Identify hot- or cold-rolled form, coil or cut length, dimensions and quantity.
  • Include the required certificates, identification and any extra tests.
  • Describe visible surfaces, cutting or forming, coating and intended exposure.
  • Set the destination and delivery basis so freight scope is comparable.

Review the dedicated Type 2 sheet, Type 4 sheet and Type 5 sheet inquiry pages. A supplier can then confirm a proposed material and whether the requested form and dimensions can be offered.

Related question: is A606 a plate standard?

Its scope is for sheet and strip, including specified coil and cut-length forms. If the order is for a heavy structural plate, begin with the governing project drawing and review a relevant plate specification instead of changing the product name alone. The material certificate should trace back to the accepted designation.

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