# Casting Alloy Density and Pour Temperature Reference > Source: https://netray.co/tools/casting-alloy-density-and-pour-temperature-reference > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Free Tools ## Short answer Look up density, pounds per cubic inch, approximate liquidus and typical pour temperature ranges for common iron, steel, aluminum, zinc, magnesium and copper casting alloys. ## Category engineering-plm ## Industry Foundry ## Audience - Foundry engineer - Estimator - Metallurgist ## Tool **Kind:** worksheet **Mode:** reference **Columns:** #### Alloy **Key:** alloy **Type:** text #### Family **Key:** family **Type:** select **Options:** - Cast iron - Cast steel - Aluminum - Zinc - Magnesium - Copper alloy - Nickel alloy #### Typical specification **Key:** spec **Type:** text #### Density **Key:** density **Type:** number **Unit:** g/cc **Format:** decimal #### Weight per cubic inch **Key:** lb_in3 **Type:** number **Expr:** density * 0.036127 **Unit:** lb/in3 **Format:** decimal #### Approx. liquidus **Key:** liquidus **Type:** text #### Typical pour temperature **Key:** pour **Type:** text **Rows:** **Alloy:** Gray iron Class 30 **Family:** Cast iron **Spec:** ASTM A48 **Density:** 7.15 **Liquidus:** about 2150 to 2200 F **Pour:** 2500 to 2700 F **Alloy:** Gray iron Class 40 **Family:** Cast iron **Spec:** ASTM A48 **Density:** 7.2 **Liquidus:** about 2100 to 2150 F **Pour:** 2500 to 2700 F **Alloy:** Ductile iron 65-45-12 **Family:** Cast iron **Spec:** ASTM A536 **Density:** 7.1 **Liquidus:** about 2100 to 2150 F **Pour:** 2450 to 2650 F **Alloy:** Ductile iron 80-55-06 **Family:** Cast iron **Spec:** ASTM A536 **Density:** 7.1 **Liquidus:** about 2100 to 2150 F **Pour:** 2450 to 2650 F **Alloy:** Carbon steel WCB **Family:** Cast steel **Spec:** ASTM A216 **Density:** 7.85 **Liquidus:** about 2750 F **Pour:** 2850 to 2950 F **Alloy:** Low alloy steel 80-50 **Family:** Cast steel **Spec:** ASTM A148 **Density:** 7.85 **Liquidus:** about 2740 F **Pour:** 2850 to 2950 F **Alloy:** Stainless CF8 (cast 304) **Family:** Cast steel **Spec:** ASTM A351 **Density:** 7.8 **Liquidus:** about 2640 F **Pour:** 2800 to 2950 F **Alloy:** Stainless CF8M (cast 316) **Family:** Cast steel **Spec:** ASTM A351 **Density:** 8 **Liquidus:** about 2600 to 2650 F **Pour:** 2800 to 2950 F **Alloy:** Inconel 718 (cast) **Family:** Nickel alloy **Spec:** AMS 5383 **Density:** 8.2 **Liquidus:** about 2430 F **Pour:** vacuum investment, 2650 to 2850 F **Alloy:** Aluminum A356 **Family:** Aluminum **Spec:** ASTM B108, AMS 4218 **Density:** 2.68 **Liquidus:** about 1135 F **Pour:** 1290 to 1360 F **Alloy:** Aluminum 319 **Family:** Aluminum **Spec:** ASTM B108 **Density:** 2.79 **Liquidus:** about 1120 F **Pour:** 1290 to 1380 F **Alloy:** Aluminum 380 (die cast) **Family:** Aluminum **Spec:** ASTM B85 **Density:** 2.71 **Liquidus:** about 1100 F **Pour:** 1200 to 1300 F **Alloy:** Magnesium AZ91D **Family:** Magnesium **Spec:** ASTM B94 **Density:** 1.81 **Liquidus:** about 1100 F **Pour:** 1290 to 1400 F **Alloy:** Zinc Zamak 3 **Family:** Zinc **Spec:** ASTM B86 **Density:** 6.6 **Liquidus:** about 725 F **Pour:** 780 to 840 F **Alloy:** Zinc Zamak 5 **Family:** Zinc **Spec:** ASTM B86 **Density:** 6.6 **Liquidus:** about 727 F **Pour:** 780 to 840 F **Alloy:** Zinc ZA-8 **Family:** Zinc **Spec:** ASTM B791 **Density:** 6.3 **Liquidus:** about 759 F **Pour:** 790 to 850 F **Alloy:** Leaded red brass C83600 **Family:** Copper alloy **Spec:** ASTM B584 **Density:** 8.8 **Liquidus:** about 1830 F **Pour:** 2050 to 2250 F **Alloy:** Tin bronze C93200 **Family:** Copper alloy **Spec:** ASTM B584 **Density:** 8.8 **Liquidus:** about 1830 F **Pour:** 2050 to 2200 F **Alloy:** Aluminum bronze C95400 **Family:** Copper alloy **Spec:** ASTM B148 **Density:** 7.45 **Liquidus:** about 1900 F **Pour:** 2100 to 2250 F **Alloy:** Yellow brass C85400 **Family:** Copper alloy **Spec:** ASTM B584 **Density:** 8.4 **Liquidus:** about 1650 F **Pour:** 1950 to 2100 F **Notes:** Values are typical and rounded for estimating and planning. Density varies with composition and porosity, and liquidus shifts with chemistry and carbon equivalent. Always follow your foundry procedure and the governing specification for pour temperature. Multiply lb per cubic inch by part volume in cubic inches to estimate casting weight. ## Content **Intro:** Estimators and foundry engineers constantly need the density of an alloy to turn a model volume into a weight, and a pour temperature range to sanity check a furnace plan. This table puts both in one searchable place, with weight per cubic inch calculated for you. **Sections:** #### How to use the table **Body:** Search by alloy, family or specification. Read density in grams per cubic centimeter and the calculated pounds per cubic inch. Multiply the pounds per cubic inch by the casting volume in cubic inches from your CAD model to get weight. For metric parts, multiply density in grams per cubic centimeter by volume in cubic centimeters to get grams. Use the liquidus and pour columns as a quick check against furnace and ladle practice. Export the table to Excel to drop into a quoting sheet. #### How the numbers behave **Body:** Pour temperature is always above the liquidus, because metal cools in the ladle and must still fill thin sections. The superheat is typically a few hundred degrees for iron and steel, and smaller for aluminum and zinc. Thin sections, investment molds and large castings each push the target in different directions. Density in castings also varies a little with microporosity, so for tight weight limits a measured sample weight is better than a table value. Alloys within the same family often have almost identical density. #### Common mistakes **Body:** The most common error is using wrought density for a casting alloy, or using steel density for stainless grades with a heavier chemistry. Another is quoting pour temperature as a single number when it depends on section thickness and mold. Do not use liquidus as the furnace set point. If your alloy is not listed, use your supplier data sheet or the governing specification, not an approximate guess, especially for certified work where chemistry controls everything. **Cta:** If you want alloy properties and heat chemistry tied to your ERP item and lot records, we can build that on your own servers. **Faq:** #### How do I estimate casting weight from a CAD model? **Answer:** Take the solid volume from the CAD model and multiply by the alloy density. Use pounds per cubic inch with volume in cubic inches, or grams per cubic centimeter with volume in cubic centimeters. Add machining stock if the model is the finished part. #### Is liquidus the same as pour temperature? **Answer:** No. Liquidus is the temperature above which the alloy is fully liquid. Pour temperature is higher so that the metal stays fluid while it fills the mold. Both depend on chemistry and section size. #### Why do ductile and gray iron have similar density? **Answer:** Both are iron with carbon and silicon, and graphite occupies space in both. The shape of graphite differs, flakes versus nodules, which changes strength and ductility far more than it changes density. #### Are these values good enough for certified work? **Answer:** They are fine for estimating and planning. For certified or safety critical work, rely on the governing specification and your foundry procedure, and verify weight and chemistry with measured data. ## Search terms casting alloy density table, pour temperature by alloy, gray iron density, a356 aluminum density, casting metal weight per cubic inch, liquidus temperature casting alloys, ductile iron pouring temperature, zamak 3 density --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json