Scrappy Industry

The engineer meticulously tightens the last screw on their brand new transport belt... and turns it a few times too many. The mechanism is entirely ruined... but not unsalvageable. Swearing yet undeterred, they throw its sproingy remains onto the pile of rejects and begin anew.

Mechanics:

• Not for the faint of heart, this mod gives many recipes a (very low) percent chance to fail, and an approximately corresponding percent chance to yield scrap materials.
• This does not yield Fulgoran scrap, but instead random bits and pieces of iron, copper, circuitry, etc.
• Metal scrap can be smelted back into plates for re-use, and circuit scrap can be crafted back into electronic and advanced circuits. No recycler needed!
• New in 0.2.0: Plastic bars and LDS now yield Plastic bits as byproducts, which can be crafted back into Plastic bars with a bit of petroleum gas. (Optional)
• New in 0.3.0: Lithium dust is the byproduct from Lithium, which is volatile and must be dealt with quickly. (Optional)
• New in 0.10.0: Mechanical scrap can be used to create gears and engines. (Optional)
• If you want similar chaos with fluids, also try Scrappy Chemistry!
• Fully compatible with Space Age, and plays well with all of the mods I've tested so far.
  

NOTE: This does NOT work well with adding to an existing game. You theoretically could but I don't advise it since all of your machines would fill up with unhandled scrap.

Compatibility:

• Generally, this mod should be compatible with any other mod, though new metals and resources won't have scrap items unless supported.
• Space Age: Tungsten scrap, Holmium scrap, and Lithium dust
• AAI Industry: Sand
• Wooden Industry: Woodchips
• Lead: Lead scrap
• Titanium: Titanium scrap
• Tin: Solder added to recipes for circuits from scrap
• Rusting Iron: Rusty iron scrap
• All That Glitters: Gold dust
• Bluetonium: Radioactive waste
• Iridescent Industry: Prismite and mythril scrap
• Voidcraft: Scrap included in random voidcrafting outcomes
  

Modding Interface:

• This mod has an API for adding new items and recipe byproducts.
• ScrapIndustry.items[] is the main access point, defining what the byproduct item(s) are (scrap=), how much each amount contributes to the scrap amount (scale=), and how much to penalize the success of the recipe for being more complex (failrate=)
• New in 0.2.0: You can now add multiple scrap byproducts from the same item, e.g. scrap={"iron-scrap", "steel-scrap"}.
• ScrapIndustry.recipes[] can be used for customizing specific recipes where the default values aren't what you intended. You can set ignore=true to bypass the recipe entirely. failrate=n overrides the auto-calculated value. self_scrap=true changes the recipe to index its products instead of its ingredients for calculating scrap (e.g. used for circuit recipes in base.lua). If you set fake_ingredients to a list of ingredients (using the same format as a regular ingredients list) then the recipe will produce scrap based on that list of ingredients rather than its actual one.
• ScrapIndustry.categories[] currently only has two values, ignore=true which disables adding scrap byproducts to all recipes in that crafting category, (enabled for "smelting" by default) and self_scrap=true which works the same as it does for recipes but applies it to the entire category.
• Fluid "scrap" byproducts are not supported yet. Recipes with only fluid products will also not have scrap byproducts generated by default (e.g. sulfuric acid).
• Defining ScrapIndustry.products[] is optional, controls priority for scrap byproducts. If there are 4+ byproducts, the least important one is discarded.
• NOTE: Plastic bits are optional, for now check settings.startup["scrap-industry-plastic"].value before adding it to anything. An API improvement is underway to make this more automatic.
• Recipes are modified in data-final-fixes.lua, so make changes to ScrapIndustry before then, and either make changes in data-updates.lua, or preferably mark scrap-industry as a dependency and make your additions in data.lua
• Duplicates are also created for hand-craft support by default. This is so they can be seamlessly crafted as intermediates.
• See the lua files in the prototypes/compat/ folder for examples.
• If you have any questions or API feature requests, feel free to DM me on the factorio forums or discord.
  

Credits:

• Malcolm Riley's Unused Renders for the wonderful metal scrap icons, recolored, modified, and repurposed for various metals.
• Inspired by StephenB's Production Scrap for IR3