AISI O6 Oil Hardening Tool Steel

• (Machine finish) T & B with saw-cut edges
• (Machine finish) FOUR SIDES
• PRECISION GROUND
• HOLLOW BAR

DESCRIPTION

An electric furnace oil hardening tool steel that differs from conventional tool steels because of the presence of free graphite in the structure. Graphite in the annealed material imparts free machining characteristics unparalleled in competitive grades. This means faster removal of stock and longer life of the cutting tool used. Should be used on any job where wear properties and anti-frictional characteristics, such as resistance to scuffing, are of prime importance.

ADVANTAGES

• Free machining qualities
• High resistance to wear
• Good anti-frictional properties with less tendency for pick-up and scoring than other tool steels
• High physical properties Uniform structure
• Excellent response to heat treatment
• A tougher oil film between wearing surfaces as a result of the unusual mechanical structure of this steel

TYPICAL ANALYSIS

CARBON ……….1.45 MANGANESE 1.00Max PHOSPHORUS ….0.025

SULPHUR …….0.025 SILICON ………..1.25Max MOLYBDENUM ...0.25

HEAT TREATMENT

FORGING …………1900° to 1950° F, stop at 1500° F and cool in air

NORMALIZING…..1600° F, cool in air

ANNEALING ……..1450° F, furnace cool, Brinell 217

HARDENING ……..1450° to 1500° F, oil quench

TEMPERING ……….300° to 600° F, hardness C-63 to 58

MACHINABILITY

Related at 120 in the properly annealed condition. Standard of comparison is a one percent carbon tool steel rated at 100.

TEMPERING RESULTS: Graph-MO .394" square test bars—oil quenched from 1450° F.