C15 Steel - Hardenability Diagram

C15 Steel

Steel name: C15
Diagram No.: 1909
Chemical composition in weight %: See the table bellow
Steel group: Boron steels
Applications: No data
Comment: Steel C15 without boron; C9, 0.0003 percent of B (grainal No. 79); C12, 0.0022 percent of B (ferroboron) ; C14, 0.0036 percent of B (ferroboron); C19, 0.0001 percent of B (grainal No.1). All specimens were held for 45 min in the furnace at temperature just prior to end-quenching except as indicated. A, Specimens normalized at 1,650° F before end-quenching from 1,550° F; B, specimens normalized at 1,900° F before end-quenching from 1,550°, C, specimens quenched from 1,900° F in water before end-quenching from 1,550° F; D, specimens normalized at 1,650° F reheated to 1,900° F then cooled to 1,550° F and held for 30 min before end-quenching; E , specimens normalized at 1,650° F, reheated to 1,900° F, then cooled to 1425° F and held for 30 min before end-quenching; F, specimens normalized at 1650° F, reheated to 1,900° F, then cooled to 1,425° F and held for 30 min then quenched in water. The specimens were then treated as follows: Specimens CJ9 A and C9 reheated to 1,550° F and end-quenched; specimen C19 B reheated to 1,750° F and end-quenched.
Reference: Not shown in this demo version.

Heat Treatment

Chemical Composition of the Alloys and Steels

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Hardenability Diagram

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