Alloy 20 stainless steel is a super-austenitic stainless alloy developed for maximum corrosion resistance to sulfuric acid and other aggressive environments not suitable for typical austenitic grades.

Our Alloy 20 steel is a solution for stress corrosion cracking that can occur when stainless steel is introduced to chloride solutions. We supply Alloy 20 steel for a variety of applications and will help in determining the precise amount for your current project. Alloy 20 can be used for a wide variety of applications including control valves, pressure relief valves, and centrifugal pumps. It is composed of carbon, chromium, copper, iron, manganese, molybdenum, nickel, phosphorous, silicon, and sulfur.

Best Stainless provides its customers with a variety of alloy 20 steel stock shapes under the high quality standards of UNS N08020 and ASTM B473.

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Alloy 20 Key Features & Benefits

Superior corrosion resistance to sulfuric acid
Excellent resistance to stress corrosion cracking
Outstanding performance in chloride solutions
Super-austenitic composition for aggressive environments
Higher corrosion resistance than standard 316/317 grades
Suitable for chemical processing applications

Alloy 20 Mechanical Properties

Condition	Ultimate Tensile Strength (PSI)	0.2% Yield Strength (PSI)	Elongation (% in 2in.)	Reduction Of Area (%)	Hardness Brinell	Hardness Rockwell	Quote
Annealed	80,000	35,000	30	50	*	*	Quote »

Alloy 20 Applications

Control Valves
Pressure Relief Valves
Centrifugal Pumps
Chemical Processing Equipment
Sulfuric Acid Handling Systems
Heat Exchangers
Reactor Vessels
Piping Systems

Alloy 20 Stock Shapes

Alloy 20 Composition

Carbon 0.070% Max
Chromium 19.0-21.0%
Copper 3.0-4.0%
Iron 29.85-44.0%
Manganese 2.0% Max
Molybdenum 2.0-3.0%
Nickel 32.0-38.0%
Phosphorus 0.045% Max
Silicon 1.00% Max
Sulfur 0.035% Max

Industry Standards

UNS N08020
ASTM B473
ASME SB-473
ASTM B729

Call us today at (713) 482-4000

Alloy 20 Stainless Steel Supplier