I think we let that little detail slip based on the repro units that were breaking a few years ago.
Yup, we were discussing the Forge marks.
It is forged from AISI C1045 HR STEEL-Fine Grain.
It is hardened by quenching in oil and drawn to a Brinell hardness of 192-241
Forgings must be free from loose scale, cold shuts or laps and any indication of overheating or burning.
They are to have the following physical properties:
Tensile Strength = 100,000 PSI
Yield Point = 68,000 Pounds
Elongation 20%
Reduction in area 50%
and... to Answer Fred's question, the WO-6682 was not specified as forest green, but was the identical part painted with Murphy's Glyceral phthalate flat green, N.U. 6547 or equivalent
Question: WO A-6370 Lunette Casting Identification
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Re: Question: WO A-6370 Lunette Casting Identification
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Re: Question: WO A-6370 Lunette Casting Identification
And the Brinell Hardness Test is evidenced by the grind mark and the ball impression on the neck of the Lunettes.
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Re: Question: WO A-6370 Lunette Casting Identification
I looked that up and it said it was for waterproofing?
So, this is like a primer/waterproofer and they painted the parts forest green after assembly like the rest of the NOM trailer?
So, this is like a primer/waterproofer and they painted the parts forest green after assembly like the rest of the NOM trailer?
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Re: Question: WO A-6370 Lunette Casting Identification
Yes, it was a PRIMER, but it was different than the 6370 which had a lusterless OD Primer...
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Re: Question: WO A-6370 Lunette Casting Identification
Glyceral Pthalate is another technical term for good old fashioned Alkyd Enamel.
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Re: Question: WO A-6370 Lunette Casting Identification
Directly related update from MBT restoration thread:
viewtopic.php?f=141&t=282888&start=15
Ray found a distinct similarity between the Dodge Weapons Carrier bolt heads and the marking on this lunette.
Ray, "The Dodge Bolts head logo looks like what you have there . DPCD = Dodge, Plymouth,Chrysler, DeSoto I really think you discovered something great !! "
So the theory is that this is the Chrysler Foundry mark. Meaning that this lunette may have been forged there.
viewtopic.php?f=141&t=282888&start=15
Ray found a distinct similarity between the Dodge Weapons Carrier bolt heads and the marking on this lunette.
Ray, "The Dodge Bolts head logo looks like what you have there . DPCD = Dodge, Plymouth,Chrysler, DeSoto I really think you discovered something great !! "
So the theory is that this is the Chrysler Foundry mark. Meaning that this lunette may have been forged there.
Chance
1943 - January | Willys MB "Skimpy" | Frame No. #203301
1943 - January | Willys MB-T | Serial No. 21488
1943 - January | Willys MB "Skimpy" | Frame No. #203301
1943 - January | Willys MB-T | Serial No. 21488
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