AISI S5 Shock Resistant Tool Steel

DESCRIPTION

An electric furnace, high quality shock resisting steel. Developed originally to meet the need for a shock-resisting steel which combines great ductility with high hardness.

ADVANTAGES

Maximum shock-resistance for hardness under Rockwell C-59
Good wear-resistance
Hardens in either oil or water

TYPICAL ANALYSIS

CARBON ……………………0.60 MANGANESE …………0.70

SILICON ……………………1.85 MOLYBDENUM ………0.50

VANADIUM ………………..0.25

HEAT TREATMENT

FORGING ………………………………..1850°F to 1950°F, stop at 1650°F and cool slowly

NORMALIZING ………………………...Do not normalize

ANNEALING ……………………………1450°F, furnace cool. Brinell 229

HARDENING ……………………………1625°F oil-quenched; 1550°F, water quench to 150°F

TEMPERING ……………………………...400°F to 650°F, Rockwell C-61-57

MACHINABILITY

Machines without great difficulty when annealed to a maximum of 229 Brinell. Has a rating of 65 as compared with a one percent carbon tool steel which has a rating of 100.

TEMPERING RESULTS

Normal tempering procedure is to hold at temperature for at least 1 hour for each inch of greatest thickness. Tempering temperatures will normally be between 400 and 650F, depending on the service desired. The resulting Rockwell C hardness for oil-and water-quenching and tempering from 300 to 1300F by 100-degree intervals are as follows:

	Hardness Rockwell C
Tempering Temperatures °F	Oil-quenched 1600°F	Water-quenched 1600°F
300	63	63
400	61	61
500	60.5	60
600	59	59
700	57.5	57.5
800	53	53.5
900	51	51
1000	49	48
1100	47	45
1200	40.50	40
1300	33.50	30

Results may be used as a guide in tempering tools to desired hardness. However, since ¾-in. diameter specimens were used in the test, tools of heavy section or mass may be several points lower in Rockwell hardness a given treatment.