A-53 Tested Pipe
Chemical Composition
Seamless (Type S) and Electric-Resistance-Welded (Type E)

A-53 Pipe - Grade A                            

Carbon - 0.25% Max            
Manganese - 0.95%              
Phosphorous - 0.05% Max          
Sulfur - 0.045% Max         
Copper - 0.40% Max          
Nickel - 0.40% Max          
Chromium - 0.40% Max          
Molybdenum - 0.15% Max          
Vanadium - 0.08% Max
Properties
Seamless (Type S) and Electric-Resistance-Welded (Type E)
Grade A:
 Tensile Strength: 48,000 psi min
 Min. Yield Strength: 30,000 psi min
Grade B:
 Tensile Strength: 60,000 psi min 
 Min. Yield Strength: 35,000 psi min 
Typical Uses
A53 pipe is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas and air lines.

A-53 Carbon Steel Tested Pipe

ASTM A53 carbon steel tested pipe has undergone specific testing to determine it can be used in mechanical and pressure applications, such as low pressure plumbing. While designed for pressure applications A53 Tested Pipe can also be used in many vapor, water, gas, or air line applications.
 

Grades of A-53 Carbon Steel Tested Pipe

A53 pipe comes in three types and two grades...
A53 Type F, which is longitudinally furnace butt welded or continuous welded (Grade A only).
A53 Type E, which is longitudinally electric resistance welded (Grades A and B)
A53 Type S, which is seamless pipe, produced by hot working, and possibly cold finishing, the steel (Grades A and B)
ASTM A53, Type S is now currently an outdated specification and has been replaced by ASTM A106 specification for seamless carbon steel pipe.