heat treating s7 tool steel
The purpose of this brochure is to provide a general idea of how tool steel is heat treated and how it behaves during this process. It has a relatively low carbon concentration compared to D2 and A2 steels 045 055 and significantly less chromium 300 350.
Sihard 2357 Steel Mat No 1 2357 Din 50crmov13 1 Aisi S7
As it is air quenched it should stay pretty straight.
. 815 226-8800 800 435-0717 Fax. If youre not at the peak out of heat hardness on these drop down on your tempering temperatures. Base your tempering temperature on the end use of the metal.
Tools made of Carpenter S7 tool steel may be hardened by. Then heat to 1300-1400F 704-760C and equalize. Again length and thickness at play.
Sections up to 2 12 645 mm thick may be cooled in air. S7 toolsteel has exceptional impact properties plus the highest hardenability of shock resisting grades of tool steelIt also possesses good softening resistance at high temperatures which gives it hot work capabilitiesBecause of its unusual combination of properties S7 is suitable for a wide range of tool and die applicationsIt is used for hot and cold shock applications medium hot. This will leave the end to be struck softer and should not chip shrapnel from itself or hammer face.
915 226-4388 AISI S7 AISI S7 - Chrome-Moly-Shock Resistant Steel AISI S7 is a shock steel with exceptional impact properties - unnotched Charpy over 200 ft-lb at 400F temper. 17251750F hold 3045 minutes at temperature. The exceptional toughness and shock-resistant qualities of this steel makes it a great option for a variety of tooling applications.
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. Might warp more by hard milling after HT. S7 Tool Steel Properties.
12 When you heat treat these make sure you get them quenched quickly. The combination of strength and high toughness makes S7 tool steel a candidate for a wide variety of tooling applications. But less of a problem with S7 than with some others.
With a furnace The only caveat is as with any airhardening steel you need to run the cutters sharp slower sfm and dont dwell or let it rub keep it cutting. LSS S7 tool steel can be used successfully for both cold and hot work applications. S7 A2 D2 and the High Speed steels require multiple tempering cycles.
A rule of thumb is that liquid quenched steels may be tempered once air hardening steel require a double temper and high speed steels should. To a large degree with tool steel you control the balance of hardness vs toughness - after heat treating you temper it or let it down. Tempering at temperatures less than 400F is not recommended.
Check your hardness out of heat. S7 is an easy tool steel to machine and Heat Treating is easy as well. The warp issue might have to do with the overall length and thickness.
For complex and large tools heat to 1150-1250F 621-677C and equalize. Air hardening and versatile enough for use in both cold and hot work tooling make S7 suitable for a wide range of applications that require shock resistance size stability and machinability where temperatures of the tool will not exceed 1000F. Id try milling to size and then sharpen.
Stop at 1700F and cool slowly. It features excellent impact and shock resistance and decent resistance to softening at high temperatures. 400F for cold-working and similar applications and 900-1000F for hot-work applications.
Cincinnati Tool Steel Company Phone. We Utilize Over 60 Furnaces Ranging From Lab-Sized To Commercial Furnaces 48 Feet Long. In the heat treatment of tool steels the purpose of this discussion is to review the basic heat treating process its steps.
S7 Tool Steel is an air-hardening or oil hardening tool steel that is characterized by its shock resistance excellent toughness high compression strength and medium wear resistance. To ol steels are high-quality steels. Ad Solar Atmospheres Offers Unmatched Technical Expertise And World-Class Equipment.
If you locally overheat the material it can spot harden ruin your tool. HEAT TREATING FORGING Preheat 1200-1300F. S7 tool steel is a versatile formulation suitable for both cold and hot work service.
What is tool steel. For simple geometries use only the second preheating temperature range. They are moderately resistant to decarburization and grain growth.
HEAT TREATMENT OF TOOL STEEL 4 Uddeholm Dievar soft annealed structure. Crucible S7 is a shock-resistant air hardening tool steel designed for high impact resistance at relatively high hardness. Special attention is paid to hardness tough-ness and dimensional stability.
But perhaps the most. S7 is a very nice machining steel and easy to heat treat. The next day heat the working end to red or non magnetic and toss under the bench where it wont get stepped on.
Typical applications for S7 tool steel are punches chisels blanking dies forming dies cold and warm header dies shears compression dies hobbed dies high hardness plastic molds zinc die casting dies gripper dies etc. Since it hardens in air it is safe and stable in heat treatment. LSS S7 Shock-Resisting tool steel is an air or oil hardening tool steel that is characterized by very high impact toughness.
-- placing them in the furnace maintained at a temperature of 17001750F 927954C. Heat slowly from the preheat. To go at it with whats in stock easy to make and easy to heat treat id make it in two pieces hardened tempered tip out of drill rod and soft handle soldered or loctitied together.
SBSM Tool Steel Properties Comparison S7 is an air hardening shock resistant cold work tool steel S7 is characterized by high impact toughness at relatively high hardness levels S7 is also used for plastic mold tooling requiring high toughness levels Typical Chemical Composition Carbon 055 Chromium 325. How do you Temper S7 Tool Steel. AISI S7 Tool Steel.
Temper S7 for 1 ½ - 2 hours for each inch of greatest cross-section. Due to these properties S7 material is popular in shock-resistant applications. -- Let the tools heat naturally to the furnace temperature -- soak for 20 minutes plus 5 minutes per inch 254 mm of maximum thickness quench.
Its better to temper the stuff a few times than drop it under as Ive never had much luck re-heating S7 to peak hardness. AISI S7 tool steel is a Shock-Resisting Steel with the highest hardenability and elevated temperature softening resistance of the S-series steels. Heat the whole piece to non magnet4ic and immediatly place in a bucket of vermiculite overnight.
