Soy-based methyl ester high performance metal working fluids

A composition comprising, by weight:

• from about 20% to about 95% of a methyl ester of fatty acid and
• at least about 3% of a phosphorus-based polar non-chlorine extreme pressure additive selected from the group consisting of amine phosphates, mixtures of organic amine salts of phosphoric and fatty acids, alkylamine or alkanolamine salts of phosphoric acid, free acid forms of complex organic phosphate esters, alkyl phosphite alkanolamine ester polymers, butylamine phosphates, long chain alkyl amine phosphates, organophosphites, propanolamine phosphates, hydrocarbon amine phosphates, triethanol, monoethanol, dibutyl, dimethyl, or monoisopropanol amine phosphates, and combinations,
• the components being compatible and selected so that the composition when at working strength effectively lubricates metal parts, and imparts a four ball load wear index of at least about 40, a four ball weld point of at least about 400 kg, and/or a Falex fail load of at least about 4000 lbs, and
• wherein the composition is a soluble oil concentrate comprising up to about 90% (w/w) mineral oil, and wherein the methyl ester of fatty acid, the polar non-chlorine extreme pressure additive and mineral oil are in a weight ratio of about 1:2:6.