AISI Types 303 and 303 Se austenitic chromium nickel stainless steels to which elements have been added to improve machining and non-seizing characteristics. They are the most readily machinable of all the austenitic chromium nickel grades and are suitable for use in automatic screw machines. They are widely used to minimize seizing and galling. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-126. Producer or source: Stainless steel mills.

PROJECT 70 182-FM is a ferritic free-machining stainless steel designed to have machinability approaching that of AISI Type 416 stainless steel with corrosion resistance comparable to AISI Type 303 stainless steel. It is ideally suited for automatic screw machines and can be used for many of the same applications as Type 303. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-334. Producer or source: Carpenter.

Prodec Type 303 is a standardized resulfurized grade available in billet and bar. It has an improved machining capability over the conventional AISI Type 303 and is a product of extensive laboratory testing and application proven. The improved machinability offers shorter machining time, longer tool life, better surface finish, less distortion problems, more homogeneity in microstructures, and marginally increased resistance to corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-967. Producer or source: Outokumpu Stainless Inc.

CRUCIBLE 303 PLUS-X is a non-hardenable austenitic chromium-nickel steel to which elements have been added to improve machinability and non-galling characteristics. Better machinability than that of standard AISI Type 303 stainless is obtained by the use of higher manganese content to give a uniquely soft and machinable sulfide inclusion. This grade is non-magnetic in the annealed condition but slightly magnetic when cold worked. Typical applications are screw machine products and all machined parts requiring good corrosion resistance or non-magnetic properties. 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, machining, and joining. Filing Code: SS-387. Producer or source: Crucible Specialty Metals Division, Colt Industries.

Project 70 and Project 7000 Type 203 stainless steels are alternative materials to AISI Type 303, resulfurized stainless steel having improved machinability. High manganese and copper are substituted for some nickel resulting in a stable austenitic structure having low magnetic permeability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-505. Producer or source: Carpenter. Originally published May 1989, revised August 1997.

CARPENTER STAINLESS 302HQ-FM, a modification of Carpenter Stainless Custom Flo 302HQ, has excellent cold headability plus machinability approaching that of AISI Type 303 stainless steel. It is designed primarily for cold-headed parts that are to be drilled, slotted, broached, etc; in addition, it can be used in bar form on automatic screw machines on parts where thread rolling or cold form tapping operations are critical. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-432. Producer or source: Carpenter.

Maxival AU188Z is an enhanced-machining version of AISI Type 303 stainless steel. The alloy has a specified inclusion picture to enhance machining by modifying both sulfide and oxide inclusions. It’s widely used in applications where the machinability is the most important factor of choice in terms of cost-saving in the production of pieces using multi-spindles and screw machines. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on forming and machining. Filing Code: SS-982. Producer or source: Valbruna Stainless Inc.

Maxival 188HS is an enhanced machining version of AISI Type 303 stainless steel. The alloy has a specified inclusion picture to enhance machining by modifying both sulfide and oxide inclusions. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-1020. Producer or source: Valbruna Stainless Inc.

UNILOY 18-2 FM is a ferritic stainless steel designed to offer an optimum combination of machinability and corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-312. Producer or source: Cyclops.

CRUCIBLE 303 SUPER-X is a non-hardenable austenitic stainless steel with improved machinability and non-galling characteristics. 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, machining, and joining. Filing Code: SS-490. Producer or source: Crucible Specialty Metals Division, Colt Industries.

CRUCIBLE 303 CC is an austenitic stainless steel with an outstanding combination of good machinability and resistance to taste and odor problems in beverage applications. Its chemistry was designed especially for use in the manufacture of fittings for soft-drink beverage dispensers. Typical applications include-screw-machine products and bar and fountain accessories. 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, machining, and joining. Filing Code: SS-385. Producer or source: Crucible Specialty Metals Division, Colt Industries.

MANIFLEX-FM is a free-machining chromium-nickel austenitic stainless steel which offers excellent high-temperature strength and hardness with good corrosion resistance to combustion products. It is widely used exhaust components in automotive engines. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-291. Producer or source: Carpenter.

Uniloy 303MA is a free-machining, austenitic stainless steel having high corrosion resistance. It is superior to Type 303 stainless steel in machinability, forgeability, transverse ductility, and corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-141. Producer or source: Cyclops Corporation.

Carpenter Project 70+ Type 303 stainless is a modified version of Carpenter Stainless No. 8. The alloy is a hardenable austenitic chromium-nickel steel and is a good general-purpose product for simple and complex parts. See also Project 70/Project 7000 stainless type 303, Alloy Digest SS-409, revised June 1997, and Project 70/Project 7000 stainless type 303DQ, Alloy Digest SS-428, June 1983. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-884. Producer or source: Carpenter Specialty Alloys.

UHB Stainless 44L is a high-strength, corrosion-resistant steel with a duplex structure of about 40% austenite in a ferrite matrix. It is produced with extra-low carbon content for good weldability and good resistance to embrittlement and corrosion induced by carbide precipitation. It has excellent stress-corrosion resistance and an optimum combination of strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-288. Producer or source: Uddeholm Aktiebolag.

Ugima 4305 HM is general-purpose, corrosion resistant austenitic stainless steel with improved machinability. Its corrosion resistance is typical of an austenitic steel and is similar to that of the 4305 or 303. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1166. Producer or source: Schmolz + Bickenbach USA Inc..

MANIFLEX II is a chromium-nickel austenitic stainless steel that offers excellent high-temperature strength and hardness with good corrosion resistance to combustion products. It is used in strip form in butterfly valves in emission control devices where cold forming and welding are involved. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-318. Producer or source: Carpenter.

LESCALLOY 15-5 VAC-ARC is a precipitation hardening martensitic stainless steel with minimal delta ferrite. Vacuum arc remelting in the production of the alloy provides a low gas content, clean steel with optimum transverse properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-522. Producer or source: Latrobe Steel Company.

UNILOY 303 and 303Se are improved machinability grades of 18-8 general purpose austenitic stainless steels. Machinability is respectively improved by additions of sulfur or selenium. Whereas standard 18-8 stainless steel had a machinability rating about 40-50% that of AISI B1112 free-machining carbon steel, these steels have a rating of about 70% that of AISI B1112. UNILOY 303Se is preferred over UNILOY 303 where machined finish and good cold formability and corrosion resistance are desired. 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, machining, and joining. Filing Code: SS-512. Producer or source: Cytemp Cyclops.

Carlson Alloy 303 is an austenitic chromium-nickel stainless steel to which elements such as sulfur have been added to improve machinability and nonseizing characteristics. The steel is the most readily machinable of all austenitic chromium-nickel grades and is suitable for automatic screw machines. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1098. Producer or source: G.O. Carlson Inc..