Alloy 20

Alloy 20 is a nickel-iron-chromium based austenitic super alloy with additions of Copper and Molybdenum. This provides excellent corrosion resistance to several different variables. Such As, hostile environments, pitting, and crevice corrosion. Proven to be useful the oil and gas, food processing, chemical and pharmaceutical industries to name a few. Application of the alloy could result in exceptional cost savings when carefully compared to other more expensive alloys. Determine if the desired resistance is obtained in the chosen applications and environment and are limited to a maximum temperature of 1000°F per ASME.

Composition
Nickel, 32–38%
Chromium, 19–21%
Carbon, 0.06% maximum
Copper, 3–4%
Molybdenum, 2–3%
Manganese, 2% maximum
Silicon, 1.0% maximum
Niobium, 1% maximum
Iron, 31–44% (balance)

Other Names
UNS N08020
DIN 2.4660
CN7M
Carpenter 20 CB-3TM
AL 20TM
Carlson Alloy C20TM
Nickelvac 23TM
Nicrofer 3620 NbTM, also known as VDM® Alloy 20

Specifications
ASME SB729, SB464, SB366, SB473, SB462
ANSI / ASTM A555-79
EN 2.4660
UNS N08020
Werkstoff 2.4660
Castings are designated CN7M

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