Alcoa 2024 alloy has good machinability and machined surface finish capability, and is a high-strength material of adequate workability. It has largely superseded alloy 2017 (see Alloy Digest Al-58, August 1974) for structural applications. The alloy has comparable strength to some mild steels. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as machining and surface treatment. Filing Code: AL-346. Producer or source: ALCOA Wire, Rod & Bar Division.

Kaiser Aluminum alloy 2011 is one of the most popular screw machine stock alloys available. Tennalum, a division of Kaiser Aluminum, produces alloy 2011 in the T3 temper as Microchip II, which offers excellent machinability and surface finish. The chips from Tennalum’s Microchip II (T3 temper only) are known for being small in size. Alloy 2011 is typically used in connectors and fittings, brake pistons, computer parts, knobs, and meter shafts. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: AL-352. Producer or source: Kaiser Aluminum Corporation.

Kaiser Aluminum Alloy 7075 has high mechanical properties and, in the T73 and T74 tempers, offers improved corrosion-cracking resistance. The alloy has good machinability. It is typically used in aircraft structural parts. (See also Alloy Digest Al-457, January 2019.) This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: AL-368. Producer or source: Tennalum, A Division of Kaiser Aluminum.

Atlas 302HQ is a chromium-nickel-copper austenitic stainless steel. It is a specialized wire grade with very wide usage for the manufacture of stainless steel fasteners. The inclusion of 3% copper in the composition reduces the cold work hardening rate substantially compared to type 304 austenitic stainless steel. Atlas 302HQ is the standard for the manufacture of self-tapping screws and light machine screws. It is also used for some bolts, set screws, rivets, and specialized fasteners. It has now totally replaced type 384 and type 305 austenitic stainless steels for cold heading applications, because Atlas 302HQ has relatively higher copper content which is used a lower-cost alternative to the high nickel contents in those alloys. 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-1350. Producer or source: Atlas Steels.

CarTech 303 is a free-machining austenitic stainless steel. The addition of sulfur to this 18-8 chromium-nickel austenitic stainless steel, which is ordinarily tough and difficult to machine, enhances the alloy’s machinability to the degree that it can be readily utilized for producing parts on automatic screw machines at about 70% of the speed of SAE 1212. This sulfur modification has led to widespread acceptance and use of this grade in the screw machine industry. 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-1337. Producer or source: Carpenter Technology Corporation.

CARPENTER STAINLESS No. 5-F is a modification of AISI Type 416 stainless steel and was designed for an optimum combination of machinability and corrosion resistance. It comprises a specially balanced analysis and is essentially non-hardenable. It is recommended for all screw-machine applications, particularly those involving intricate machining operations or where superior finishes are required as-machined. Its uses include valve trim, carburetor needles and many other screw-machine parts. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. 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-275. Producer or source: Carpenter. Originally published July 1972, revised July 1980.

Copper Alloy No. C34000 is a medium-leaded brass characterized by an excellent combination of free-machining and cold-working properties. It is intended for screw-machine applications where excellent thread-rolling, knurling, machining and cold-forming properties are required. Among its many applications are gears, nuts, rivets, screws and threaded connectors. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-415. Producer or source: Copper and copper alloy mills.

MUELLER COPPER 1470 is a high-conductivity copper to which sulfur has been added to provide free-machining characteristics. Thus it is well suited for screw-machine work. Its electrical conductivity and corrosion resistance approach those of copper but it has higher strength and better machinability. Among its many specific applications are plumbing fittings, electrical connectors, screws, cold-heated and machined parts and cold forgings. 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: Cu-440. Producer or source: Mueller Brass Company.

MUELLER Alloy 3140 is a high-copper alloy with moderate strength, a rich bronze color and excellent corrosion resistance. Its lead content gives it excellent machinability which makes it suitable for screw-machine applications. Its uses include many screw-machine products, decorative hardware, pickling crates and parts to resist severe atmospheric conditions. 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: Cu-451. Producer or source: Mueller Brass Company.

MUELLER Alloy 3602 is a leaded brass of moderate strength and ductility. It is suitable for moderate thread rolling. Also, because of its free-cutting characteristics, it is suitable for high-speed screw-machine products. Among its many applications are hardware, unions, bolts, screws and nuts. 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: Cu-489. Producer or source: Mueller Brass Company.

Mueller Brass C38500 is a wrought copper-zinc-lead alloy (leaded brass) that is suitable for high-speed screw machining applications and moderate thread rolling. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: Cu-924. Producer or source: Mueller Brass Company.

Kaiser Alloy 7075 in pipe and tube is used in hydraulic lines. This alloy is covered in Alloy Digest Al-368, March 2000, but that datasheet is for screw machining bar stock whereas this one includes tube and pipe data. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as joining. Filing Code: Al-457. Producer or source: Kaiser Aluminum Corporation.

Cryodur 2833 is a wear-resistant water-hardening steel with resistance to overheating. Applications include cold heading dies; first and finish upsetting punches; cold stamps; dies for the manufacturing of screws, rivets, and bolts; and compression pistons. This datasheet provides information on composition and physical properties. It also includes information on heat treating. Filing Code: TS-777. Producer or source: Schmolz + Bickenbach USA Inc..

Mueller Brass C36000 is a wrought, Cu-Zn-Pb alloy (leaded brass) that is suitable for high-speed screw machining applications and moderate thread rolling. On the basis of strength alone, it can safely be substituted for leaded steel in many applications. UNS C36000 is the most important commercial copper alloy, surpassing all but copper itself in terms of annual consumption. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: Cu-918. Producer or source: Mueller Brass Company.

Atlas 303 is a free-machining austenitic stainless steel. It is primarily used when production involves extensive machining in automatic screw machines. The sulfur addition which is responsible for the improved machining and galling characteristics of Atlas 303 lowers its corrosion resistance to below that of type 304 austenitic stainless steel. Compared with the other austenitic grades, Atlas 303 has excellent toughness, although its sulfur content reduces its toughness slightly. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: SS-1351. Producer or source: Atlas Steels.

CHASE 444 BRONZE is a special free-cutting Phosphor Bronze, Grade B-2. It is used primarily for automatic screw machine products, bearings and gears. 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: Cu-43. Producer or source: Chase Brass & Copper Company Inc..

REVERE No. 240 is a highly leaded brass combining free-machining characteristics with good mechanical and corrosion resistant properties suited to high-speed production in automatic screw machines. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-9. Producer or source: Revere Copper and Brass Inc..

ALCAN 28S is a free-cutting alloy having good mechanical properties. It responds to an age-hardening heat treatment and is designed primarily for screw machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and machining. Filing Code: Al-36. Producer or source: Aluminum Company of Canada Ltd.

MUELLER 604 is a high leaded copper alloy that is especially suited for screw machine work. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, machining, and joining. Filing Code: Cu-108. Producer or source: Mueller Brass Company.

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.