Products / Steel rod
Steel rod
Hot-rolled solid round bar. Nominal mass depends on diameter and assumed steel density. Standards specify permitted diameters, grades and tolerances; confirm the ordered designation.
- Diameter range
- 5 to 270 mm (GOST 2590)
- Weight rule
- 0.006165 × d² kg/m
- Standards
- GOST 2590 · EN 10060 · ASTM A29 · GB/T 702
- Grades
- St3 · S235–S355 · A36 · Q235
Diameter changes weight quickly.
Increasing diameter from 20 to 25 mm adds 56.3% to theoretical mass per metre. Mass follows diameter squared, not diameter alone.
Send the complete designation from your drawing with your quote request.
Nominal calculations at 7.85 g/cm³, rounded to two decimals. Both circles use the same scale.
Sizes and weights by standard
Weights are theoretical, from nominal dimensions at 7.85 g/cm³: Actual delivered mass and billing basis must be confirmed with the quotation. Verified tables have been checked against the stated standard or catalogue source; Calculated values are nominal estimates, subject to the stated assumptions.
All standardsWeight by diameter
Calculated
Calculated from nominal diameter at 7.85 g/cm³: kg/m = 0.006165 × d². Surface area per metre is included for paint and galvanising estimates.
| Diametermm | Weightkg/m | Acm² | Surfacem²/m |
|---|---|---|---|
| Ø6 | 0.222 | 0.283 | 0.019 |
| Ø8 | 0.395 | 0.503 | 0.025 |
| Ø10 | 0.617 | 0.785 | 0.031 |
| Ø12 | 0.888 | 1.13 | 0.038 |
| Ø14 | 1.21 | 1.54 | 0.044 |
| Ø16 | 1.58 | 2.01 | 0.050 |
| Ø18 | 2.00 | 2.54 | 0.057 |
| Ø20 | 2.47 | 3.14 | 0.063 |
| Ø22 | 2.98 | 3.80 | 0.069 |
| Ø25 | 3.85 | 4.91 | 0.079 |
| Ø28 | 4.83 | 6.16 | 0.088 |
| Ø30 | 5.55 | 7.07 | 0.094 |
| Ø32 | 6.31 | 8.04 | 0.101 |
| Ø36 | 7.99 | 10.2 | 0.113 |
| Ø40 | 9.86 | 12.6 | 0.126 |
| Ø45 | 12.5 | 15.9 | 0.141 |
| Ø50 | 15.4 | 19.6 | 0.157 |
| Ø56 | 19.3 | 24.6 | 0.176 |
| Ø60 | 22.2 | 28.3 | 0.188 |
| Ø63 | 24.5 | 31.2 | 0.198 |
| Ø70 | 30.2 | 38.5 | 0.220 |
| Ø75 | 34.7 | 44.2 | 0.236 |
| Ø80 | 39.5 | 50.3 | 0.251 |
| Ø90 | 49.9 | 63.6 | 0.283 |
| Ø100 | 61.7 | 78.5 | 0.314 |
| Ø110 | 74.6 | 95.0 | 0.346 |
| Ø120 | 88.8 | 113 | 0.377 |
| Ø130 | 104 | 133 | 0.408 |
| Ø140 | 121 | 154 | 0.440 |
| Ø150 | 139 | 177 | 0.471 |
| Ø160 | 158 | 201 | 0.503 |
| Ø180 | 200 | 254 | 0.565 |
| Ø200 | 247 | 314 | 0.628 |
| Ø220 | 298 | 380 | 0.691 |
| Ø250 | 385 | 491 | 0.785 |
Grades across standards
Close in strength, not identical in chemistry or impact testing. Confirm the exact sub-grade per project.
| Role | GOST | EN | ASTM | GB |
|---|---|---|---|---|
| Mild, ~235 MPa | St3sp | S235JR | A36 (250) | Q235B |
| Mid, 275 MPa | – | S275JR | – | Q275 |
| High, ~355 MPa | 09G2S (345) | S355JR / J2 | A572 Gr50 (345) | Q355B |
Theoretical and delivered weight
Multiply the nominal table weight by the ordered length or area to estimate theoretical mass. Delivered mass can vary with manufacturing tolerances. Confirm whether the quotation and invoice use theoretical or weighed mass.
Galvanised weight
Hot-dip galvanising coats every surface, so it adds more to light, thin sections than to heavy ones: roughly 1.5% on heavy plate, up to 8 to 10% on a light angle or thin tube. Compare galvanised to galvanised. Minimum coating per EN ISO 1461:
| Steel thickness | Mean coatingµm | Mean coatingg/m² per side |
|---|---|---|
| over 6 mm | 85 | 610 |
| 3 to 6 mm | 70 | 505 |
| 1.5 to 3 mm | 55 | 395 |
| under 1.5 mm | 45 | 325 |
Need a size or standard not listed?
We hold no stock yard, so we are not limited to one. Send the designation from your drawing and we will source the round bar to it.