Dimensions
| Parameter | Symbol | Value | Unit | Data |
|---|---|---|---|---|
| Outside diameter | D | 20.0 | mm | U |
Section Properties
| Parameter | Symbol | Value | Unit | Data |
|---|---|---|---|---|
| General | ||||
| Mass per metre | mass | 2.47 | kg/m | C |
| Gross area | A | 314 | mm² | C |
| About x-axis (major) | ||||
| Second moment of area Ix | Ix | 0.008 | 10⁶ mm⁴ | C |
| Elastic section modulus Zx (min) | Zx | 0.8 | 10³ mm³ | C |
| Plastic section modulus Sx | Sx | 1.3 | 10³ mm³ | C |
| Radius of gyration rx | rx | 5.0 | mm | C |
| Torsion & warping | ||||
| Torsion constant JExact (πD⁴/32) | J | 0.016 | 10⁶ mm⁴ | C |
| Surface area | ||||
| External surface area | extArea | 0.063 | m²/m | C |
Steel Grades
| Grade | Standard | fy MPa | fu MPa | Note | Data |
|---|---|---|---|---|---|
| S235JR | EN 10025-2:2019 | 225 | 360 | Common grade | U |
| S355J2 | EN 10025-2:2019 | 345 | 470 | Available – confirm with supplier | U |
Strengths shown for governing thickness t = 20.0 mm. Density 7850 kg/m³, E = 200 000 MPa.
Where to buy
Producers of Flat & round bars – local mills first. Buy direct from the mill for large tonnages, or through a steel distributor / stockist for small quantities and cut lengths.
Local producer
Standards: IS 2062
International producer
Standards: ASTM A36
International producer
Standards: ASTM A36
International producer
Standards: AS/NZS 3679.1
International producer
Standards: IS 2062
International producer
Standards: ASTM A36
Buying checklist
- Specify the section designation, product standard and steel grade exactly (e.g. "RD 20 – EN 10060:2003 – S235JR").
- Ask for mill test certificates (EN 10204 type 3.1 or equivalent) traceable to the heat number.
- Sections from another standard system are not automatically equivalent – have the engineer approve any substitution.
- Check availability, minimum order quantity, stock lengths, lead time and delivery terms with the mill or distributor.
All producers of this product type →
Listing is informational only – not an endorsement, offer or confirmation of availability. Company details are marked UNVERIFIED until checked.
Source & Verification
- Source publisher
- Pending verification – nominal dimensions entered by the application developer
- Source document
- EN 10060:2003 Hot rolled round steel bars – Dimensions and tolerances
- Edition
- 2003
- Publication year
- 2003
- Page reference
- —
- Last updated
- 2026-10-12
- Verification status
- Unverified
Nominal dimensions require verification against the current edition of EN 10060:2003 Hot rolled round steel bars – Dimensions and tolerances and the manufacturer catalogue before design use. Properties are calculated by this application from the nominal dimensions.