300M Steel Alloy Round Bar (E4340 Modified)
300M is a “Modified 4340,” with the addition of vanadium and a higher silicon content, it offers a combination of toughness and ductility at high-strength levels. 300M is a deep hardening steel with excellent torque properties, high fatigue and creep characteristics, and maintains its strength at moderately high temperatures. Meets MIL-S-8844, and others.
Typical Mechanical Properties – 300M Bar:
|Properties AFTER heat treatment||Up to 100 sq in||Over 100-144 sq in|
|Tensile Strength (psi)||280,000 min||280,000 min|
|Yield Point (psi)||230,000 min||230,000 min|
|Reduction of Area (%)||30 min||25 min|
Note: “Typical Mechanical Properties” listed in this catalog have been compiled from a variety of sources. Information is deemed reliable, but not guaranteed. Data is provided for information only, NOT FOR DESIGN PURPOSES.
Stocked in 11-13 foot random lengths; cut pieces available. Other sizes may be available on request.