Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 0

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 1

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 2

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 3

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 4

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 5

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 6

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 7

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 8

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 9

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 10

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty, US $12.99 – Picture 11

Lot 10 Thick Heat Treated Chrome Moly Steel Alloy Flat Washers 5/8" Heavy Duty

US $12.99

Springfield, Tennessee, United States
Jan 29th

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1980B3H.1.44 New Military Surplus (Manufactured by Binder Metals), Heat Treated, Chrome Moly Steel Alloy Flat Washers, Part Number X10910174-38. Each bid quantity is for a Lot of Ten (10) Washers. You may bid / buy any number of lots, up to the total quantity available above. These were purchased from another military surplus dealer recently, and they are brand new in the original factory boxes. We repackaged them in heavy 4-mil Ziplok bags for resale. Best I can research, 4130 steel that is heat treated to Rockwell C 35+/- is remarkably tough, and the carbon content is within the range that allows excellent weldability. With an average thickness of about 1/4," these are not exactly your garden variety hardware store washers. Should be excellent for a wide range of demanding applications. According to the box: Inside diameter: .646" min. - .696" max. (fits 5/8" bolt) Outside diameter: 1.740" min. - 1.790" max. Thickness: .243" min. - .257" max. Material: 4130 Chrome Moly Steel Heat Treatment: 33 - 38 (Rockwell C) [Tensile strength approx. 157,000] Finish: Yellow Chromate According to various online sources: 4130 steel is commonly referred to as chromoly, an alloy which contains chromium and molybdenum among other elements. The number ‘4130' is a code that the American Iron & Steel Institute uses to define the approximate chemical composition of the steel. The ‘41' indicates an alloy steel containing chromium and molybdenum, while the ‘30' indicates a carbon content of 0.3%. PROPERTIES AND COMMON USES: Chromoly is stronger than normal steel, weight for weight, and is commonly used to make high-end bicycle frames, roll cages for race cars, and for fuselages on small aircraft. Chromoly’s high strength-to-weight ratio and high tensile strength makes it an ideal choice for these particular applications. In addition, 4130 is utilized in a variety of applications because of its weldability, formability, ductility and toughness. Overall it is considerably stronger and more durable than standard 1020 steel. While this particular grade of steel does contain chromium, it is not in enough quantities to provide the corrosion resistance found in stainless steel. Regarding the manufacturing of high-end bicycle frames, chromoly is typically used to make bikes lighter rather than stronger. This means that manufacturers use less of the steel so the strength is the same, but the weight is reduced. However, the stiffness of the steel is approximately the same, so with less of it to be stiff, the chromoly bike frame ends up more flexible than the standard steel one. One of the most important characteristics of chromoly is its ability to be case hardened by carburization of the surface. The core of the material retains its bulk properties, while the outside is significantly hardened to reduce wear and tear on the part. This makes this particular grade of steel an excellent material for such uses as gears, piston pins, crankshafts, etc.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Binder Metals
MPN	X10910174-38
Model	Heat Treated Chrome Moly
Type	Chrome Moly Steel Washers