A53 seamless carbon steel and alloy steel mechanical pipe

Steel grade and chemical composition( %)

Steel grade

carbon≤

manganese≤

phosphorus≤

sulfur≤

copper≤

nickel≤

chromium≤

molybdenum≤

vanadium≤

A

0.25

0.95

0.05

0.045

0.40

0.40

0.40

0.15

0.08

B

0.30

1.20

0.05

0.045

0.40

0.40

0.40

0.15

0.08

Mechanical properties

Steel grade

tensile strength (Mpa)

Yield strength (Mpa)

Elongation (%)

Delivery state

A

≧330

≧205

≧20

annealing

B

≧415

≧240

≧20

annealing