Legor's OG445L is a soft yellow alloy for mechanical working. This is a versatile product which possesses an excellent quality:price ratio. Offers good work-ability. OG445L is an alloy for general purposes in mechanical working. If a more yellow-greenish color is required, the alloy composition can be modified with the addition of silver, according to the following ratio: Au: 585 / Ag: 75 / OG445L: 340. After this modification, liquidus temperature (Tliq.) will be about 870°C. Casting and graining temperatures reported in this technical sheet will be consequently reduced of about 20°C. MSDS. Technical Sheet.