Stainless Steel Tube Weight Calculator
Mass per metre and total for stainless tube.
Quick answer
With the default inputs: Outside diameter 60 · Wall thickness 3 · Length each 6 etc.Total mass 25.561 kg
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Result
Total mass
25.561kg
| Mass per metre | 4.2601kg/m |
| Mass each | 25.561kg |
| Total length | 6.00m |
| Inside diameter | 54.00mm |
| Section area | 537.21mm² |
| Metres per tonne | 234.7m/t |
| External area per metre | 0.1885m²/m |
| Ratio to carbon steel | 1.0102 |
Stainless density runs 7.90-8.00 by grade, with 7.93 usual for 304/316. The same size weighs about 1% more than carbon steel but costs 4-8 times as much, so every 0.1 mm of wall saved matters. Pressure pipe must not be thinned for cost — check against design pressure.
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Formula
| Mass per metre | W = π × ρ ÷ 1000 × t × (D − t) |
| At ρ = 7.93 | W = 0.02491 × t × (D − t) |
| Carbon steel | W = 0.02466 × t × (D − t) |
| Total | per metre × length × quantity |
| Inside diameter | d = D − 2t |
| Ratio | 7.93 ÷ 7.85 = 1.0102 |
Φ60 × 3.0 mm, one 6 m length: 4.262 kg/m, 25.57 kg, 54 mm bore, 537.2 mm² section and about 235 m per tonne.
How to work it out
- Confirm the grade first, since densities differ: 304, 304L and 321 are 7.93 g/cm³, 316 and 316L are 7.98, 310S is 7.98 and 430 is 7.70.
- Unit weight: W = (D − t) × t × 0.02491 for 7.93; grade 316 uses 0.02507.
- Plate weight per m² is thickness × 7.93, only 1% above carbon steel at 7.85, but not negligible on volume.
- Multiply by length and count, then price by tonne or by metre.
- Finishes (mirror, brushed, embossed) do not change weight but do change price and tolerance.
Where it goes wrong
- Using the carbon steel constant 0.02466 — 304 is 0.02491 (1% more) and 316 is 0.02507 (1.7%); invisible on one piece, tonnes on a large project.
- Using 7.93 for every grade — 316 and 310S are 7.98 and 430 is 7.70, a 3% spread.
- Assuming stainless tolerances are looser — tube wall tolerance is tighter than carbon steel, but the price is far higher, so the money at stake per millimetre is larger.
- Substituting stainless for carbon steel on section alone — 304 yields around 205 MPa against 235 for Q235, so a straight swap is unsafe.
Material and cost
304 tube 18000-26000 CNY/t, 316L 28000-38000, 304 2B plate 15000-22000, mirror finish adds 20-40%.
On site
- Stainless holds its theoretical weight better than carbon steel, but thin-wall tube still runs under.
- 304 and 201 look identical and differ 40% in price; test with a magnet (201 is slightly magnetic, 304 is not) or with reagent, not just on price.
- Use 316 on the coast or in chloride exposure; 304 pits within a couple of years there.
Basis
- GB/T 14976-2012 Stainless steel seamless tubes for fluid transport
- GB/T 12771-2019 Stainless steel welded tubes for fluid transport
- GB/T 3280-2015 Cold-rolled stainless steel plate, sheet and strip
FAQ
Why is stainless tube so much dearer than carbon steel?
Because the alloying elements cost: 304 carries 18% chromium and 8% nickel, and 316 adds 2-3% molybdenum, with nickel and moly both expensive. Material is over 70% of the price, so stainless tracks the nickel market. Where coated carbon steel will do, use it — stainless is really needed only for food, medical, aggressive corrosion and exposed architectural work.
304 or 316?
304 suits most indoor and general outdoor work; 316 with molybdenum resists chloride pitting far better, so it is for coastal sites, pools, de-icing salt and chemical lines. The test is chloride concentration: below 200 mg/L use 304, above use 316. Within 500 m of the sea, or wherever salt water is routine, 304 pits within a year or two.
What wall tolerance applies to stainless tube?
Decorative tube under GB/T 18705 typically allows ±10%, pressure tube under GB/T 14976 is tighter. Much of the decorative market sells at 80% of nominal — 1.2 mm labelled, 0.95 mm measured. Handrails take human impact loads and thin walls simply fold, so gauge them on inspection rather than reading the label.
Cite this page
Use this format in reports, method statements or coursework. The link is permanent.
Building Calculator. Stainless Steel Tube Weight Calculator. 2026-10-25. https://jianzhujisuan.com/en/stainless-weight
Results are estimating aids only and are not a design basis. Construction and final accounts must follow the drawings, the applicable standards and an approved method statement. Anything affecting structural safety, shoring or falsework must be checked by a suitably qualified engineer.