Product Description:

 Tool Steel

AISI S7 Shock Resistant Tool Steel

• (Machine finish) T & B WITH SAW-CUT EDGES
• (Machine finish) FOUR SIDES

DESCRIPTION

Shock steel with exceptional impact properties. Since it hardens in air, it is safe and stable in heat treatment. Most remarkable characteristic is its versatility. Used widely for medium-run cold-work tools and dies, for plastic-molding dies, for shear blades, for medium hot-work dies, for master hobs, and for component parts of many Products.

ADVANTAGES

• Good machinability
• Maximum shock resistance
• Air hardening
• Cold & medium hot-work characteristics

TYPICAL ANALYSIS

CARBON ………………..0.50 SILICON …………………0.25

MANGANESE ………….0.70 CHROMIUM ……………3.25

MOLYBDENUM ……….1.40

HEAT TREATMENT

FORGING ………………………………..Preheat 1200°F to 1300°F; forge at 2000°F to 2050°F, stop at

1700°F and cool slowly

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

ANNEALING ……………………………1500°F to 1550°F, cool slowly to 1000°F, air-cool, Brinell 197 max

PREHEATING ……………………………1200°F to 1300°F, prior to hardening

HARDENING …………………………….1725 °F. Quench in air if cross-section is 2-1/2 in. or smaller;

sections 2-1/2 in. to 6 in. should be oil-quenched to black

(1000°F) followed by air-cooling to 150°F; larger cross-sections

should be oil-quenched to 150°F.

TEMPERING ……………………………...400° F minimum. Double tempered is recommended.

MACHINABILITY

Rated at 95 annealed to Brinell 197 max., as compared to a rating of 100 for a one percent carbon Tool Steel.

DIMENSIONAL STABILITY

Can be expected to expand no more than 0.001 in./in. of cross-section when quenched in air from the proper hardening temperature.

IMPACT PROPERTIES

To determine impact properties, unnotched Charpy impact specimens were selected. They were machined over-size, heat-treated, and finish-ground to 0.250 in x 0.375 in x 2.165in. The heat treatment consisted of preheating at 1300F, and tempering at increasing temperatures.

Tempering Temperatures °F	Hardness Rockwell C	Unnotched Charpy Specimens (ft., lbs.)
400	58	180
500	56	227
600	55	228
700	54	199
800	53	179
900	52	190
1000	51	230
1100	46	264* (no break)
1200	39	264* (no break)
1300	33	264* (no break)

Maximum impact value obtained on impact testing machine.

Special Steel classification：

Stainless steel，Hi-Steel HSLA-80，Steel mould,Heat resistant steel,Tool Steel,Ball bearing

steel,Spring steel,Alloy steel,Construction steel，Die steel，Mould steel.

Product description：

Step Shaft AISI S7  Tube AISI S7  Pie-shaped AISI S7  Ring AISI S7  Module AISI S7  Large

valves of the main AISI S7  Other Profiled forgings AISI S7

Products Introduction  :

Specialized and high quality steel.

We have the advantages of equipment, technologies and price.

Specifications

Round bar ：
Diameter : 1mm-2000mm

Square bar:
Size： 50mm * 50mm-600mm *600mm

Plate steel/flat bar:
Size：Thickness:0.1mm-800mm Width:10mm to 1500mm

Tube/pipe:
Size：OD:6-219mm  WT：1-35 mm.

Cold-rolled sheet:Thickness:2-5mm Width:1000mm Length:2000mm
Hot-rolled sheet:Thickness:6-80mm Width:210-610mm

Length: We can supply any length based on the customer's requirement.

Forging/hot rolling/ extrusion of steel.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching

+ tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on

the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable

electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the

customer's requirement

Excellent service for all kinds of industries,with advantages of technologies, equipment and

price.

We serve you with our honesty, integrity, and professionality.