FreightCal2026
Metals & Alloys·Class 50

Density of Gray Cast Iron (Class 30)

High damping capacity casting iron with excellent compressive strength and machinability for engine blocks.

Density (PCF)450lbs / cu ft
Metric Density7.2g / cm³
Density (SI)7,200kg / m³
NMFC FreightClass 50104700
Industrial Material & Freight Sizing

Material Weight & Freight Density Calculator

Select an industrial material or enter custom density. Calculate dimensions to total weight, volume, NMFC class, and trailer payload limits.

lbs/cu ft
Total Shipment Weight
3,000 lbs
1,361 kg · (5 units)
Single Piece Weight
600.0 lbs
272.2 kg per unit
Freight Class & Density
Class 50
450 PCF (7.208 g/cm³)
53ft Semi PayloadOK
6.7%
of 45,000 lbs legal payload

Logistics & Transport Recommendations

Pallet Packaging Rule

Safe stacking limit: 4 pieces per pallet to stay within the 2,500 lbs standard wood pallet rating.

NMFC Item Guidance

Reference code: 104700 (Iron Castings in Rough). Rated under Class 50 based on 450 PCF density.

  • Shipment utilizes 6.7% of a standard 53ft trailer's 45,000 lbs legal cargo payload (42,000 lbs capacity remaining).
  • Standard GMA pallet recommendation: Maximum 4 units per pallet to remain within the 2,500 lbs safe working limit.

Shipping, Packaging & Stacking Specifications for Cast Iron

Transport & Palletizing Rules

Brittle material. Susceptible to impact shock during rough rail transit or road potholes. Blocked with timber.

Typical Industrial Applications
  • Engine cylinder blocks
  • Manhole covers & grates
  • Machine tool beds
  • Brake rotors
Critical Handling Cautions:
  • Do not drop or shock-load; lacks tensile ductility and can shatter
Material density and metallurgical weight benchmarks correspond to standard test specifications from ASTM International and density rating tables from NMFTA.

Compare with Other Metals & Alloys

View all materials
Class 50Carbon Steel (A36 Structural)
490 lbs/cu ft
Class 50Stainless Steel (Grade 304)
495 lbs/cu ft
Class 50Stainless Steel (Grade 316 Marine)
500 lbs/cu ft

Cast Iron Weight & Freight FAQs

What is the density of Gray Cast Iron (Class 30) in lbs/cu ft and g/cm³?

The standard density of Gray Cast Iron (Class 30) is 450 pounds per cubic foot (lbs/cu ft), which equals 7.2 grams per cubic centimeter (g/cm³) or 7,200 kilograms per cubic meter (kg/m³).

What NMFC freight class is assigned to Cast Iron?

Due to its density of 450 PCF, shipments of Cast Iron typically qualify for Class 50 (the lowest, most economical LTL freight tier for dense cargo exceeding 50 lbs/cu ft). The primary reference item is 104700 (Iron Castings in Rough).

How many pieces of Cast Iron can I load on a standard pallet?

A standard GMA 48x40 wooden pallet is rated for a maximum payload of 2,500 lbs. Use our interactive calculator above to enter your exact plate, bar, or tube dimensions to verify your pieces-per-pallet threshold before strapping.