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Next-generation alloys for next-generation weapons
Forged in fire.
Proven in battle.
Superior firepower since 1898
Carpenter Technology has been producing superior firepower since our armor-piercing alloys helped win the Spanish–American War in 1898. Our new A-21 and GNB200 alloys continue that tradition, offering manufacturers an exclusive strategic advantage.
A-21®
GNB200
A-21 is a state-of-the-art stainless knife blade and rifle barrel alloy offering a unique combination of high strength, excellent toughness, and outstanding stainless properties.
Razor-sharp edges.
Tough at any temperature.
A-21 is the world’s first and only truly stainless carburizing steel. In the carburized and heat treated condition, it remains rust-free after 200-hour exposure to salt fog (ASTM B117).
Rust buster
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No rust. The first and only truly stainless carburizing steel.
Razor-sharp blades. High surface hardness holds edges.
Rugged. Strong and resistant to thermal fatigue. Excellent toughness to -40°F.
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A-21®
Advanced martensitic stainless steel for blades and barrels
GNB200 is a premium hammer forgeable rifle barrel alloy specially formulated for high-temperature applications requiring high mechanical strength and toughness.
Precision metallurgy. THE next-gen alloy for next-gen high strength weaponry.
Rugged. Maintains impact strength from 1000°F to -40°F.
Cost-effective. Built for existing mass production processes.
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Download the DATASHEET
WATCH THE WEBINAR
Conventional carburized
stainless steel (62 HRC)
Carburized A-21 (62 HRC)
Rapid-fire impact strength.
Hammer forgeable.
GNB200
Premium melted steel, THE rifle barrel alloy
Download the white paper
WATCH THE WEBINAR
Download the DATASHEET
AMERICAN MADE.
MILITARY GRADE.
FIELD READY.
TALK TO AN EXPERT
A-21
GNB200
CHAT WITH A WEAPONRY
ALLOY EXPERT
CHAT WITH A WEAPONRY
ALLOY EXPERT