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M42

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Barra piatta HSS M42

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M42 super high speed steel is a premium cobalt high speed steel with a chemical composition designed for high hardness and superior hot hardness. These properties make the steel an excellent choice for machining high-strength and pre-hardened steels, high-hardness alloys, and the difficult-to-machine, nonferrous super alloys used in the aerospace, oil, and power generation industries.

M42 exhibits excellent wear resistance by virtue of high heat-treated hardness (68 to 70 HRC), and the high cobalt content imparts the hot hardness. As such, the cutting edges on tools made from M42 super high speed steel stay sharp and hard in heavy-duty and high-production cutting applications.


Travaux:

AISI M42 tool steel is a high-speed steel suitable for cutting tools such as, twist drills, broaches, taps, milling, cutters, saws, reamers etc. In terms of performance, HSS grade M42 is a steel to be used in conditions where the demand for hot hardness is of great importance i.e. where high performance is essential.


Quick Detail:M42---Flat Bars 


COMPOSITION

        C
       Si       Cr
       W      Mo        V
       Co
      1.08      0.453.85
      1.50      9.50
      1.20      8.00


PROPRIETÀ RELATIVE


ISTRUZIONI DI TRATTAMENTU DI CALORE : INDURIZZAMENTU

TEMPERATURA CRITICA :
Ac1: 1560 ° F (849 ℃)


Tempu:Pressurized gas, warm oil, or salt. For pressurized gas, a rapid quench rate to sottu à 1000 ° C (538 ° F) 

is critical to obtain the desired properties. For oil, quench until black, 

about 900°F (482°C), then cool in still air to 150 -125°F (66-51°C). For salt maintained at 1000-1100°F (538-593°C), 

equalize, then cool in still air to 150 -125°F (66-51°C).


Temperatura:Temper immediately after quenching. Typical tempering range is 1025-1050°F (552-566°C).

Hold at temperature for 2 hours, then air cool to ambient temperature. Double tempering is required. 

For large cross sections, and especially for blanks from which tools will be cut by wire EDM, 

triple tempering is strongly recommended.


vantaggiu:

all-round applicability

good machine-ability

good performance

good hot hardness

good wear resistance


Item       Dimensione (mm)prucessu       Cundizione di consegna
Pianu BarT 3.0-20 XW 20-100Rolled HotSuperficie nera & Anneal


Common M42 Tool Steel Related Specifications and M42 High Speed Steel Equivalents


paeseUSAtedescoGiappone
StandardASTM A600DIN EN ISO 4957JIS G4403
librettuM421.3247/HS2-9-1-8SKH59


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