Section
Sheet / Plate Coil / Strip Round bar / Wire Square bar Hex bar Flat bar / Patti Round pipe / Tube Square hollow section Rectangular hollow section Angle (equal / unequal) Channel I-beam / H-beam Tee section Circle / Disc blank From a section table (kg/m)
Grade (sets the density)
AISI 201 — 7.8 g/cm³ AISI 202 — 7.8 g/cm³ AISI 304 — 7.93 g/cm³ AISI 304L — 7.93 g/cm³ AISI 316 — 7.98 g/cm³ AISI 316L — 7.98 g/cm³ AISI 321 — 7.9 g/cm³ AISI 303 — 7.93 g/cm³ AISI 409M — 7.75 g/cm³ AISI 410 — 7.7 g/cm³ AISI 430 — 7.7 g/cm³ AISI 431 — 7.7 g/cm³ Duplex 2205 — 7.8 g/cm³ Alloy 904L — 7.98 g/cm³ 17-4 PH — 7.75 g/cm³
Theoretical weight only. Mill rolling tolerance normally makes the
delivered weight differ by 2–5%; we invoice on actual weighbridge weight.
How the weight is worked out
Every shape reduces to the same sum — cross-section area × length × density.
Weight (kg) = Area (mm²) × Length (mm) × Density (g/cm³) ÷ 1,000,000
Densities follow ASTM A240 / A276 for stainless grades. This is
theoretical weight: mill rolling tolerance normally moves the delivered weight by
2–5%, and we invoice on actual weighbridge weight.
Density by grade
Grade Family g/cm³
AISI 201 S20100 Austenitic 7.8 AISI 202 S20200 Austenitic 7.8 AISI 304 S30400 Austenitic 7.93 AISI 304L S30403 Austenitic 7.93 AISI 316 S31600 Austenitic 7.98 AISI 316L S31603 Austenitic 7.98 AISI 321 S32100 Austenitic 7.9 AISI 303 S30300 Austenitic 7.93 AISI 409M S40930 Ferritic 7.75 AISI 410 S41000 Martensitic 7.7 AISI 430 S43000 Ferritic 7.7 AISI 431 S43100 Martensitic 7.7 Duplex 2205 S32205 Duplex 7.8 Alloy 904L N08904 Super austenitic 7.98 17-4 PH S17400 Precipitation hardening 7.75
15 section shapes
Sheet / Plate Coil / Strip Round bar / Wire Square bar Hex bar Flat bar / Patti Round pipe / Tube Square hollow section Rectangular hollow section Angle (equal / unequal) Channel I-beam / H-beam Tee section Circle / Disc blank From a section table (kg/m)
