S7 Oversize Ground Flat Stock, Shock Resistant Tool Steel Super-7 PM

Tue, 26 Nov 2013 20:55:00 GMT

S7 Oversize Ground Flat Stock, Shock Resistant Tool Steel Super-7 PM
Buy Now: $19.88

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This Super-7 Oversize Tolerance Ground Flat Stock is made by Precision Marshall Steel Company. The steel type is AISI S-7 shock-resistant tool steel, annealed for easier machining.

Super-7 is suitable for use in applications requiring high impact strength such as shears, punches, blanking dies and chisels. Its superior soundness makes it suitable for high-hardness plastic molds and zinc die casting dies.

The standard nominal sizes are ground to a satin finish on four sides, free of decarburization, held to tight tolerances in dimensions and squareness, and ready for layout. Each piece is lightly coated with rust-preventive oil and individually packaged in a vapor-resistant envelope which has the size and steel type clearly marked. At least one end is painted black for easier identification of the steel type.

The oversize Thickness |T| tolerance is +.010/+.015". The oversize Width |W| tolerance is +.010/+.015". The 18" Length |L| tolerance is +.125/.250". The 36" Length |L| is tolerance +.250/.500".

The available thicknesses are 1/8 to 1/2 inches. The available widths are 1/2 to 6 inches. Please contact us if you need a different size, or if you need us to make any alterations.

DELIVERY TIME: Normally in stock and ships the next business day.

SHIPS FROM: Precision Marshall products are sent directly to you from the warehouses in Bolingbrook, IL; Hartford, CT; Euless, TX; or Santa Fe Springs, CA.

MINIMUM ORDER: None.

HEAT TREATMENT: SUPER-7 is subject to decarburization during heat treatment, so a protective atmosphere furnace or a vacuum furnace should be used. After preheating 1200/1250°F, soak material for one half hour per inch of thickness. When material reaches this temperature, heat to 1725°F, then soak material for one half hour per inch of thickness when material is up to this temperature. Air cool or oil quench to hand warm (approximately 150°F) and temper immediately. Note: Sections over two inches thick should be interrupt oil quenched or full oil quenched to attain full hardness.

TEMPERING DATA: Double temper one hour per inch of section thickness to desired hardness at a heating rate of two hours per inch. Cool in air to room temperature between the two tempers. Representative hardness levels after tempering are tabulated below. Oil quenched from 1725°F. Tempered 4 Hours.

Temper °F	Rockwell C Hardness
400	56-58
500	54-56
600	53-55
700	52-54
800	52-54
900	51-53
1000	49-52
1100	46-48
1200	39-41

Note: Variations in section size, heating rate, soak time, quench rate and tempering will cause deviations from the above values. Contact us for specific applications. The tempering range from 600° to 800°F should be avoided due to a drop in impact strength. Recommended working hardness ranges are RC 56-58 or RC 50-52.

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S7 Oversize Ground Flat Stock, Shock Resistant Tool Steel Super-7 PM