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Steel Alloy

Steel Alloy
Steel Alloy
Product Code : 11
Product Description

We have gained immense reputation in the market as a trusted supplier of Steel Alloy. It is a shock-resistant air hardening tool steel. It designed for high impact resistance at relatively high hardness. This steel offers toughness to withstand chipping and breaking, combined with high attainable hardness and good wear resistance. Steel Alloy is available in different specifications as to suit client's requirements. We offer this alloy at affordable prices.

Features:

  • Durable and sturdy
  • Light weight
  • Corrosion proof

Cold Work Steel (DIN-1.2357) (S-7)

Steel Property & Application :
S7 is a shock-resistant air hardening tool steel, designed for high impact resistance at relatively high hardness. It offers toughness to withstand chipping and breaking, combined with high attainable hardness and good wear resistance.

Typical Chemistry
Carbon0.55%
Manganese0.70%
Silicon0.35%
Chromium3.25%
Molybdenum1.40%
Vanadium0.25%

Typical Applications
Punches and Dies Subject to Heavy Impact
Wire EDMed Punches & Dies*
Warm Forging/Heading Dies
Plastic Injection Molds
Shear Blades
*S7 XL recommended for EDMing fine or intricate parts.


Hardening

Preheat: 1350/1400F, equalize.

High Heat: 1725/1750F, hold 30/45 minutes at temperature.

Quench: Air, positive pressure vacuum, interrupted oil to 150F. Sections over about 3" thick may require oil quenching to attain full hardness.

Temper: 350/1000F, hold one hour per inch of thickness (two hours minimum), air cool to room temperature. Double tempering is recommended.


Typical Properties:

Tempering
Temperature
Hardness
HRC
Toughness,
Charpy C-Notch
°F
ft-lbs

3005985
40057125
50055125
60054115
70053105
80053105
90052120
100051150
110047190
120041–

Surface Treatments
Because of the low tempering temperatures normally used, S7 is not typically suitable for nitriding or similar treatments.


Annealing
A. Heat to 1550F, hold two hours, slow cool (50F/hour maximum) to 1000F, then air cool to room temperature.
Or
B. Heat to 1550F, hold two hours, cool to 1400F, hold 4 hours, then air cool to room temperature.

Typical annealed hardness: 187/220 BHN


Stress Relieving
Annealed Material: Heat to 1200/1250F, hold two hours, cool in still air.
Hardened Material: Heat to 25/50F below tempering temperature, hold two hours, cool in still air.


Welding
Use hot work tool steel filler material 4140 or 4150 type filler material may be satisfactory for small repairs or welds away from working surface of tool.

Annealed Material: Preheat to 400/600F. Maintain above 400F during welding. Reanneal or temper 1400F for four hours after welding.

Hardened Material: Preheat to original tempering temperature, (300F minimum). Maintain above 300F during welding. Cool to 150F. Temper at 25/50F below original tempering temperature (300F minimum).

Physical Properties:

Modulus of Elasticity ....................................................................30 psi x 106
Density .............................................................................................0.283 lb/in3
Thermal Conductivity .....................200F........................... 16.5 BTU/hr/ft/°F
Thermal Expansion

Temperature Range
Coefficient of Thermal Expansion
°F
in/in/°Fx10-6
RT/400
7.0
RT/750
7.3
RT/1000
7.6
Size Range :
Φ 20 - 110mm

 

Contact Us

Plot No. 13 A, Gala No. - 3/4/5, Magzine Street, Near Devi Dayal Compound, Darukhana, Reay Road East, Mumbai, Maharashtra, 400010, India
Phone :+917042313342