General valve material forging materials for low temperature grades, Charpy V-notch impact energy

The minimum average impact energy of three specimens

Feet per pound (Joules)

13

(18)

15

(20)

15

(20)

15

(20)

15

(20)

13

(18)

15

(20)

The smallest average of a single sample

Feet per pound (Joules)

10

(14)

12

(16)

12

(16)

12

(16)

12

(16)

10

(14)

12

(16)