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Calculate the weight of steel plates, bars, tubes, pipes, beams, and angles. Get accurate weight in pounds and kilograms based on dimensions and steel grade.
• Steel density: 0.284 lb/in³
• 1 cubic foot = 490 lbs (mild steel)
• 1 cubic inch = 0.284 lbs (mild steel)
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Steel Plate:
48" × 24" × 0.25"
Mild Steel
Quantity: 5 pieces
Volume = 48 × 24 × 0.25 = 288 in³
Density = 0.284 lb/in³
Weight per piece = 288 × 0.284 = 81.79 lbs
Total weight (5 pcs) = 408.96 lbs
= 185.52 kg
| Steel Grade | Density (lb/in³) | Density (g/cm³) | Common Uses |
|---|---|---|---|
| Mild Steel (A36) | 0.284 | 7.85 | Structural, general purpose |
| Stainless 304 | 0.289 | 8.00 | Food grade, marine |
| Stainless 316 | 0.289 | 8.00 | Chemical, marine |
| Alloy Steel (4140) | 0.283 | 7.85 | High strength parts |
| Tool Steel | 0.280 | 7.75 | Dies, cutting tools |
Thin flat steel, typically in rolls
Thick flat steel, cut to size
Perforated/slitted for walkways
Wide flange for building frames
U-shaped for supports
90° angle for bracing
Calculate the cross-sectional area in square inches, multiply by 12 inches (1 foot), then multiply by steel density (0.284 lb/in³ for mild steel). For example, a 2" diameter round bar: π(1)² × 12 × 0.284 = 10.7 lbs per foot.
Stainless steel is slightly heavier than mild steel. Stainless 304/316 has a density of 0.289 lb/in³ vs 0.284 lb/in³ for mild steel - about 1.8% heavier for the same volume. This affects shipping and structural load calculations.
Calculations are accurate within 2-3% for standard shapes using nominal dimensions. Actual weight may vary due to manufacturing tolerances, surface finish, and mill scale. For critical applications, always verify with actual weighing or manufacturer specs.
Differences occur due to: 1) Manufacturing tolerances (±5% typical), 2) Mill scale adds 1-2%, 3) Rounded corners reduce weight, 4) Density varies between batches. For estimating shipping/structural loads, add 5-10% safety margin.
Depends on thickness. 1/4" thick: 163 lbs, 3/8" thick: 245 lbs, 1/2" thick: 326 lbs, 3/4" thick: 490 lbs, 1" thick: 653 lbs. These are for standard 48" × 96" mild steel plate.
Standard truck load: 40,000-45,000 lbs. LTL shipping: typically under 10,000 lbs. UPS/FedEx: 150 lbs per package. For heavy loads, consider freight shipping with liftgate service. Always check carrier restrictions before ordering.