What is D6AC?

What is D6AC?

D6AC is a medium carbon low alloy steel that is melted as AOD + VAR which improved hardenability as compared to 4340 low alloy steel. This alloy has very high strength and offers excellent notch toughness. D6AC has excellent deep hardening characteristics which lend itself well to larger components.

What is low alloy?

A low-alloy steel is a type of metal mixture composed of steel and another metals that possess desirable properties. Low-alloy steel contains about 1%-5% of alloying elements. Therefore, it possesses precise chemical compositions that provide better mechanical properties that are intended to prevent corrosion.

What is low alloy carbon steel?

Carbon and Low Alloy Steels Carbon steels are alloys of iron, carbon, manganese, and silicon. Low alloy steels are similar to carbon steels but have additional alloying elements like chromium, molybdenum, etc., to improve their heat treat response.

Why is chromium added to steel?

Chromium (Cr): Chromium is added to steel to increase resistance to oxidation. These are the Austenitic stainless steels, typified by 18-8 (304/1.4301), where the tendency of Nickel to form Austenite is responsible for a great toughness (impact strength) and high strength at both high and low temperatures.

What are the different types of low alloy steel?

As with steels in general, low-alloy steels can be classified according to:

  • Chemical composition, such as nickel steels, nickel-chromium steels, molybdenum steels, chromium-molybdenum steels.
  • Heat treatment, such as quenched and tempered, normalized and tempered, annealed.

Why Mn is added in steel?

Manganese removes oxygen and sulfur when iron ore (an iron and oxygen compound) is converted into iron. It also is an essential alloy that helps convert iron into steel. As an alloy it decreases the brittleness of steel and imparts strength.

What is the carbon content of d6ac steel?

D6AC is a low alloy vacuum melted steel containing several other elements and with a carbon content of 0.42 to 0.48%. The hardenability of this alloy is better than that of AISI 4340 and D6AC can be heat treated to strengths ranging from 180 to 260 ksi.

What kind of steel is a d6ac VAC melt?

Alloy D6AC Vac Melt N (LESCALLOY D6AC VAC ARC ®) is a medium carbon, low alloy steel. Alloy D6AC has ultra high strength and is designed for use in high strength structural applications (strength levels up to 280,000 psi). Alloy D6AC also is know for its high yield strength to tensile strength ratio, combined with good ductility.

How is lescalloy d6ac VAC-arc steel produced?

Lescalloy D6AC Vac-Arc steel is produced by consumable electrode vacuum arc remelting process to provide optimum cleanliness and preferred ingot structure, which in turn provide optimum transverse mechanical properties. PHYSICAL PROPERTIES Density: 0.284 lb/in3 (7.87 g/cm3) Coefficient of Thermal Expansion Modulus of Elasticity

Which is better AISI 4340 or d6ac?

The hardenability of this alloy is better than that of AISI 4340 and D6AC can be heat treated to strengths ranging from 180 to 260 ksi. D6AC alloy is a medium-carbon low-alloy ultra high strength steel that was primarily developed for high strength structural applications requiring ultimate tensile strength values up to 280 ksi.