Key to Metals AG (Datenlieferant)

440C (SAE)

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Kategorie Metalle > Eisenmetalle > Stähle

Einsatzbeispiele

Suitable for use where extremely high hardness and wear-resistance are desirable in a corrosion-resistant steel. It is intended for use in ball and roller bearings and races, cutting edges, shear blades, surgical and dental equipment, valve seats and other applications requiring high hardness.
These castings have been used typically for parts requiring hardness up to 58 HRC and having resistance to corrosion and to wear. Optimum corrosion resistance is obtained by hardening from 1010-1066°C (1850-1950°F) and tempering at not higher than 427°C (800°F).
These products have been used typically for anti-friction bearing parts requiring resistance to both corrosion and wear with hardness usually not lower than 58 HRC after hardening and tempering, but usage is not limited to such applications.
These products have been used typically for parts requiring minimum hardness of 58 HRC and resistance to wear, corrosion, and oxidation, but usage is not limited to such applications.

Physikalische Eigenschaften

Name	Wert	Messverfahren und -bedingungen
Dichte	7.667 kg/dm³
Mechanische Eigenschaften

0,2-%-Streckgrenze bei Zugbeanspruchung	> 1896 MPa
Schlagenergie	3.7 – 4.1 J
Zug-Elastizitätsmodul	199.95 GPa
Zugdehnung beim Bruch	> 2 %
Zugfestigkeit	> 896 MPa
Elektrische und magnetische Eigenschaften

spezifischer elektrischer Widerstand	0.61 Ω∙mm²/m

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