What is ASTM A240 Type 316?

ASTM A240 Type 316 is one of the most widely used stainless steel grades in various industries, known for its excellent corrosion resistance and versatility. If you are considering Type 316 stainless steel for your project, understanding its specifications, properties, and applications is essential.

This article covers key questions about ASTM A240 Type 316 to help you make informed decisions.

 

 

What Does ASTM A240 Type 316 Mean?

ASTM A240 is a standard specification issued by ASTM International that covers stainless steel plates, sheets, and strips for corrosion resistance and mechanical properties. Type 316 refers to a specific grade of stainless steel under this standard, characterized by its austenitic structure and addition of molybdenum for enhanced corrosion resistance.

Chemical Composition of ASTM A240 Type 316

Type 316 stainless steel contains:Chromium (Cr): 16.0–18.0%,Nickel (Ni): 10.0–14.0%,Molybdenum (Mo): 2.0–3.0%,Carbon (C): ≤0.08%.

Mechanical Properties of ASTM A240 Type 316

Tensile Strength: Minimum 75 ksi (515 MPa)

Yield Strength: Minimum 30 ksi (205 MPa)

Elongation: Minimum 40% in 2 inches

Applications of ASTM A240 Type 316

Chemical processing equipment

Marine environments and offshore structures

Food and pharmaceutical processing

Medical devices and implants

Architectural components exposed to harsh weather

What Is the Difference Between ASTM A240 Type 316 and Type 304?

Corrosion Resistance: 316 has better resistance to chloride corrosion due to molybdenum.

Cost: 316 is usually more expensive because of higher nickel and molybdenum content.

Applications: 316 is preferred in more aggressive environments like seawater or chemical plants.

How to Identify ASTM A240 Type 316 Stainless Steel?

Look for mill certifications and markings confirming compliance with ASTM A240 standards. Chemical and mechanical test reports ensure the material matches the Type 316 grade specifications.

What Is the Price Range of ASTM A240 Type 316?

The price varies based on market conditions, thickness, dimensions, and surface finish, typically ranging from $3 to $5 per pound. Demand for molybdenum and nickel significantly influences cost.