ALLOY 300M is an alloy steel offering a combination of hardenability, ductility and toughness at tensile strengths from 280,000 to 320,000 psi. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-81. Producer or source: Various alloy steel mills (licensed).

LESCALLOY 300M VAC ARC is a low-alloy steel with an excellent combination of high hardenability and high strength coupled with good ductility and good toughness. Its tensile strength ranges from 280,000 to 300,000 psi. It is produced by the vacuum consumable electrode melting process to provide optimum cleanliness and preferred ingot structure. Its applications include aircraft components, pressure vessels and fasteners. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-321. Producer or source: Latrobe Steel Company. Originally published March 1976, revised February 1993.

Lescalloy 300M-HS VAC-ARC is a clean high-strength, low-alloy steel with high strength, fracture toughness, and hardenability. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-722. Producer or source: Latrobe Specialty Steel Company.

Ferrium S53 was developed for use as a structural stainless steel for aircraft landing gear. S53 has a corrosion resistance equivalent to 15-5PH H900, strength equivalent to or better than 300M (AMS 6257A) and SAE 4340 (see Mechanical Properties), optimum microstructure features for maximum fatigue resistance, and a surface hardenability equal to or greater than 67 HRC for wear and fatigue. Please see updated designation and information on this alloy in Alloy Digest SA-589, December 2008. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-942. Producer or source: QuesTek Innovations, LLC. Originally published October 2005, revised June 2008, updated December 2008.

Ferrium S53 was developed for use as a structural corrosion resistant steel for aircraft landing gear. S53 has a corrosion resistance equivalent to 440C, strength equivalent to or better than 300M (AMS 6257A) and SAE 4340 (see Mechanical Properties), optimum microstructure features for maximum fatigue resistance, and a surface hardenability equal to or greater than 67 HRC for wear and fatigue. This datasheet is an update to Alloy Digest SS-942 and SS-1003. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: SA-589. Producer or source: QuesTek Innovations, LLC.

Carpenter Ferrium S53 is both corrosion resistant and ultrahigh-strength for aerospace structural applications. Please see updated designation and information on this alloy in Alloy Digest SA-589, December 2008. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-1003. Producer or source: Carpenter Specialty Alloys. Originally published December 2007, revised December 2008.

Ferrium M54 was designed to create a cost-effective, ultra high-strength, high-fracture toughness material with a high resistance to stress-corrosion cracking for use in structural applications. This datasheet provides information on composition, hardness, and tensile properties as well asfatigue. Filing Code: SA-822. Producer or source: QuesTek Innovations, LLC.

CSS-42L is a stainless steel containing good contents of cobalt and molybdenum. It can be case hardened to very high levels while maintaining good interior toughness and ductility. This datasheet provides information on composition and physical properties as well as fracture toughness. It also includes information on forming and heat treating. Filing Code: SS-1171. Producer or source: Latrobe Specialty Steel Company.

UNIMACH AF 1410 is a high-strength, high-fracture-resistant iron-based alloy (steel). It exhibits superior toughness over all other high-strength steels and has the highest combination of strength and toughness available in any high-strength alloy. It is recommended for consideration in a wide range of highly-stressed, fracture-critical applications such as airframe structural components, landing gear components and light armor plate. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-398. Producer or source: Cyclops Corporation.