ASTM A480/A 480M–08b

ASTM A480/A 480M–08b.pdf

 

What is ASTM A480/A480M–08b?

ASTM A480/A480M–08b is a standard specification that sets the general requirements for stainless steel flat-rolled products, including plates, sheets, and strips. The suffix "–08b" refers to the 2008 revision of the standard.

It provides unified guidelines for:Chemical composition verification,Mechanical property testing,Dimensional tolerances,Surface finish and appearance,Heat treatment and workmanship.

ASTM A480/A480M–08b acts as a quality assurance framework for stainless steel products manufactured under other ASTM standards such as A240 or A276.

 

What are the chemical composition requirements for A480?

ASTM A480/A480M–08b requires products to meet the chemical composition limits of their respective grades, for example:304: ~18-20% chromium, 8-10.5% nickel,316: ~16-18% chromium, 10-14% nickel, plus molybdenum for corrosion resistance.

Heat Treatment Requirements of ASTM A480

ASTM A480 requires heat treatment processes such as annealing or solution treating to achieve specified mechanical properties and corrosion resistance, with temperatures typically ranging from 1,900°F to 2,100°F (1,038°C to 1,149°C) depending on the stainless steel grade.

What is the dimensional tolerances for A480?

ASTM A480 specifies dimensional tolerances for stainless steel plates and sheets typically within ±0.01 to ±0.05 inches (±0.25 to ±1.27 mm) for thickness, depending on the product size and grade.

 

What Surface Finishes Does ASTM A480/A480M–08b Include?

Surface finishes range from:

Mill finish

No. 1 (hot rolled, annealed and descaled)

No. 2B (cold rolled, annealed, and pickled)

No. 4 (brushed finish)

Mirror finish (No. 8)

Customers can specify finishes based on aesthetic and functional requirements.

What is the difference between ASTM A480 and ASTM A240?

ASTM A240 covers the chemical and mechanical requirements for stainless steel plates and sheets of specific grades.

ASTM A480 defines the general requirements such as testing, tolerances, and quality assurance applicable to flat-rolled stainless steel products, including those under ASTM A240.

 

How is ASTM A480/A480M–08b certified?

Manufacturers provide certificates of compliance (CoC) showing test results for chemical composition, mechanical properties, and dimensional inspections as per ASTM A480 requirements.