Definition

Noun A type of steel that has been hardened by a heat treatment process involving heating and then rapidly cooling (quenching) in oil. The oil quench is less severe than a water quench, resulting in steel with high hardness and strength but with reduced risk of distortion or cracking compared to other quenching methods.

Usage

"Oil-hardened steel" is a technical term used primarily in metallurgy, manufacturing, and engineering contexts. It specifies both the material (steel) and its specific hardening process. It is often used to describe tools, components, or stock material known for its durability and wear resistance.

Examples

• The manufacturer specified oil-hardened steel for the precision gears to ensure longevity.
• This set of punches is made from oil-hardened steel, making it suitable for heavy-duty use.
• Compared to water-quenched steel, oil-hardened steel typically exhibits less internal stress.

Advanced Usage

• The term can function attributively as a compound adjective before a noun (e.g., ).
• In technical specifications, it is often abbreviated as OHS or found in standard grades like O1 tool steel, which is a common type of oil-hardening steel.

Variants and Related Words

• Oil-hardening steel: A variant phrasing with the same meaning.
• O1 tool steel: A specific, common grade of oil-hardened steel.
• Quenched and tempered steel: A broader category that includes oil-hardened steel.
• Air-hardened steel: Steel hardened by cooling in air, often compared to oil-hardened steel.
• Water-hardened steel: Steel quenched in water, a more severe process.

Synonyms

• Oil-quenched steel
• Oil-hardening steel (as a noun phrase)

Antonyms / Contrasting Terms

• Annealed steel: Steel that has been softened by slow cooling.
• Mild steel: Low-carbon steel not intended for hardening via heat treatment.

Noun

1. steel that is quenched in oil