The Cut2Size Angle

First off, we’re not machinists, but we can pass on what the metallurgists tell us.  Use what you read below as a general guideline, but remember that we’re not offering advice on your particular project. [Our lawyers wanted that last disclaimer to be longer and wordier, but you know what we mean!]

Here are some alloys that are available.  We stock 6061 because we find it to be the best combination of machinability, corrosion resistance, weldability, and ductility.   [That last one has nothing to do with fowl or tape; it just means "capable of being drawn out into a wire or thread."]  We also carry 6063-T5 but it is softer, and more formable, and not designed for machining. If you need the other alloys below, just give us a call at 812.429.1634.

Screw Machine Stock

2011-This alloy offers the highest machinability of all aluminum rod.  Excellent machinability; and relatively low cost make 2011 the most used screw machine alloy. Alloy 2011 is not recommended for welding or brazing, and it exhibits poor corrosion resistance. Typical applications are wiring devices and fittings, radio and TV components, optical parts, and electrical components.

2017-This alloy rates lower in machinability than 2011-but it provides slightly greater strength, better corrosion resistance, and easier welding than 2011. Alloy 2017 is also recommended for deep drilling. Typical applications are brake pistons, hinge pins, pulleys, and camera parts.

2024-This alloy has the highest tensile strength of all the aluminum screw machine alloys. It is recommended for parts that require consistent high strength. Welding characteristics and corrosion resistance are similar to 2017. Typical applications are aircraft parts, fasteners, couplings, hydraulic valve bodies, and orthopedic braces.

6061-This alloy doesn’t machine as well as the other screw machine grades, but it does offer excellent corrosion resistance and excellent welding characteristics. It is also the most ductile of the screw machine alloys. Typical applications are hydraulic pistons, decorative hardware, door knobs, handrail fittings, and valves.

6262-This alloy is second only to 2011 in machinability. It combines strength, excellent weldability, and good corrosion resistance to make it the best all-around screw machine alloy. Typical applications are marine hardware, hydraulic pistons, marine diesel fillings, and couplings.

Non-Screw Machine Stock

1100-This alloy is 99% pure aluminum and, therefore, very poor in machining qualities. It does exhibit excellent electrical and thermal conductivity, excellent corrosion resistance, and outstanding welding characteristics. Typical applications are decorative parts, cold threaded parts, and welding rod.

7075-This is the, highest strength aluminum rod or bar available. It also has machinability equal to 2017 and 2024. This alloy is not considered a screw machine grade because 7075 cannot meet screw machine straightness tolerances due to its high strength. This is a poor welding grade and has only average corrosion resistance. Typical applications are aircraft parts.

While we take credit for the scintillating descriptions and witty content of Cut2SizeMetals.com, the logo design, visual navigation, database, shipping, inventory tracking, and all the cool stuff it does comes from our friends at the ZaneRay Group. We think they’re as good at web design as we are at fabricating aluminum, stainless steel, brass, and copper!  Here is their story about how we worked together to bring you Cut2SizeMetals.com:

ESMW ESTABLISHES NEW BENCHMARK FOR ONLINE CUSTOM INDUSTRIAL AND ARCHITECTURAL FABRICATION

What is aluminum cast tool & jig plate? It is a high-quality, accurately machined aluminum plate that has received a thermal stress relieving treatment to provide dimensional stability during machining.  Typically, it can be heated repeatedly to temperatures as high as 800°F (427°C) and, when cooled, will return to its original dimension with a minimum of distortion, depending upon the extent of machining.

While the hardness will vary considerably with the thickness due to the thermal treatment, the plate will still retain good machining characteristics. Cast tool and jig plate is of the 7000 series-type alloy,  and at Cut2SizeMetals.com, we stock 1/2″ thick material.  If you need thicknesses ranging from a .250 in. to 4 in., give us a call at 812.429.1634.  The exact alloy composition is proprietary; however, it has been in use successfully for decades. This product offers good resistance to general corrosion. Since most applications of this precision product are sheltered from atmospheric and industrial environments, no special protective measures are usually required.

Tolerances

Surface Finish:  (2 Sides) <25 Microinches

Flatness Tolerance

Thickness Tolerance

Source: CS&W

Just a few of the sizes of brass round we stock.

As a brass supplier, we can offer you nearly any alloy of brass you need.  We find that the vast majority of customers, though, use alloy 260 or alloy 360.

Alloy 260

Our brass plate and sheet come in alloy 260, or as it is better known to our customers, yellow brass or cartridge brass (so called because it is used to make shell casings).  We stock the half hard temper, which has an approximate Rockwell B60-77.

Alloy 360

The extrusions we carry in brass (square bar, rectangular bar, and round) are alloy 360, known as free machining brass.  As the name implies, it has good machinability, but it is not suited for forming applications.   Like the sheet and plate, we stock half hard temper.  You can find more information by clicking on the little “Need Help Choosing?” buttons.

If you need 330 brass, naval bronze, or some other exotic alloy, give us a call at 812.429.1634; we can usually get it for you.