AISI 4150 Tool Steel

DESCRIPTION

A special analysis of alloy steel which is heat treated by oil-quenching and tempering to develop a balance of mechanical properties. Has every requisite for brake die service-high wear-resistance, adequate toughness, high resistance to impact, and good machinability. In addition, the bars are stress-relieved before the final gag straightening, to insure a minimum of residual stresses.

TYPICAL ANNALYSIS

CARBON ……..0.51 MANGANES ……….0.87

CHROMIUM …0.95 MOLYBDENUM ……0.20

ADVANTAGES

• Heat treated, ready to use, needs no further hardening
• Heat treated to the right hardness for maximum wear and toughness
• Machines easily without warping-due to strain-relief treatment
• Machines to a smooth surface without grinding
• Hardened to between 248-293 Brinell – the correct hardness for most uses
• High carbon content insures greater resistance to wear
• Small areas can be flame hardened for better wear.

DISTORTIONAL PROPERTIES

As free from residual stresses as possible due to the method of heat treating. Machining an equal amount evenly from each side of the brake die will result in minimum deformation and warping.

COMPRESSIVE STRENGTH

To obtain values for this property, specimens were taken from large and small sections, machined oversize, heat treated and finished by grinding to 0.505 in. diameter x 0.750 in. long. The specimens were checked for hardness and were then compressed between hardened steel plates. the specimens tested showed a hardness of 269 Brinell and indicated that both small and large sections developed compressive strength in excess of 100,000 psi, adequate compressive strength to meet the maximum demand of heavy duty brake-die service.