Properties
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EPSTAL steel parameters - download (PDF)
Steel grade designations
B500SP:
- B stands for steel intended for construction
- 500 means an yield strength of 500 MPa
- S stands for bonded steel
- P stands for steel with increased ductility
Tensile properties - stretching test
| Description | Designation | Unit | Value |
|---|---|---|---|
| Yield strength | Re | [MPa] | 500 ÷ 625 |
| Ratio of tensile strength to the yield point | Rm/Re | [-] | 1,15 ÷ 1,35 |
| Minimum percentage elongation | A5 | [%] | 16,0 |
| Minimum percentage elongation total at maximum strength | Agt | [%] | 8,0 |
Dimensions and geometry
| Nominal diameter |
Nominal surface cross section |
Mass nominal* |
Permissible deviation of mass |
Minimum relative area of ribs fR |
|---|---|---|---|---|
| [mm] | [mm2] | [kg/m] | [%] | [mm2] |
| 8 | 50,27 | 0,40 | ± 6,0 | 0,040 |
| 10 | 78,54 | 0,62 | ± 4,5 | |
| 12 | 113,10 | 0,89 | 0,056 | |
| 14 | 153,94 | 1,21 | ||
| 16 | 201.06 | 1,58 | ||
| 20 | 314,16 | 2,47 | ||
| 25 | 490,87 | 3,85 | ||
| 28 | 615,75 | 4,83 | ||
| 32 | 804,25 | 6,31 | ||
| 40 | 1256,64 | 9,86 |
* Weight calculated on the basis of 7850 kg/m3 steel volume.
Chemical composition
| Analysis | Maximum content in % | Ceqmax [%] |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | P | S | Cu | N* | |||
| melt | 0,22 | 1,60 | 0,55 | 0,050 | 0,050 | 0,80 | 0,012 | 0,50 | |
| product | 0,24 | 1,65 | 0,60 | 0,055 | 0,055 | 0,85 | 0,013 | 0,52 | |
| * It is permissible to exceed the given numerical values if, for each increase of 0.001% N, the maximum P content is reduced by 0.005%; however, the N content according to the melting analysis should not exceed 0,015%. |
|||||||||
| **The carbon equivalent is calculated from the formula: Ceq = C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15 | |||||||||
Tables for design
| Nominal diameter [mm] |
Cross-section area [cm2] |
Reinforcement cross-section in cm2/m depending on the spacing of rods | ||||
|---|---|---|---|---|---|---|
| 10 cm | 15 cm | 20 cm | 25 cm | 30 cm | ||
| 8 | 0,503 | 5,03 | 3,35 | 2,52 | 2,01 | 1,68 |
| 10 | 0,785 | 7,85 | 5,23 | 3,93 | 3,14 | 2,62 |
| 12 | 1,13 | 11,30 | 7,53 | 5,65 | 4,52 | 3,77 |
| 14 | 1,54 | 15,40 | 10,27 | 7,70 | 6,16 | 5,13 |
| 16 | 2,01 | 20,10 | 13,40 | 10,05 | 8,04 | 6,70 |
| 20 | 3,14 | 31,40 | 20,93 | 15,70 | 12,56 | 10,47 |
| 25 | 4,91 | 49,10 | 32,73 | 24,55 | 19,64 | 16,37 |
| 28 | 6,16 | 61,60 | 41,07 | 30,80 | 24,64 | 20,53 |
| 32 | 8,04 | 80,40 | 53,60 | 40,20 | 32,16 | 26,80 |
| 40 | 12,56 | 125,60 | 83,73 | 62,80 | 50,24 | 41,87 |
| Nominal diameter [mm] |
Reinforcement cross-section in cm2 depending on the number of rods | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| 8 | 0,503 | 1,01 | 1,51 | 2,01 | 2,52 | 3,02 | 3,52 | 4,02 | 4,53 | 5,03 |
| 10 | 0,785 | 1,57 | 2,36 | 3,14 | 3,93 | 4,71 | 5,50 | 6,28 | 7,07 | 7,85 |
| 12 | 1,13 | 2,26 | 3,39 | 4,52 | 5,65 | 6,78 | 7,91 | 9,04 | 10,17 | 11,30 |
| 14 | 1,54 | 3,08 | 4,62 | 6,16 | 7,70 | 9,24 | 10,78 | 12,32 | 13,86 | 15,40 |
| 16 | 2,01 | 4,02 | 6,03 | 8,04 | 10,05 | 12,06 | 14,07 | 16,08 | 18,09 | 20,10 |
| 20 | 3,14 | 6,28 | 9,42 | 12,56 | 15,70 | 18,84 | 21,98 | 25,12 | 28,26 | 31,40 |
| 25 | 4,91 | 9,82 | 14,73 | 19,64 | 24,55 | 29,46 | 34,37 | 39,28 | 44,19 | 49,10 |
| 28 | 6,16 | 12,32 | 18,48 | 24,64 | 30,80 | 36,96 | 43,12 | 49,28 | 55,44 | 61,60 |
| 32 | 8,04 | 16,08 | 24,12 | 32,16 | 40,20 | 48,24 | 56,28 | 64,32 | 72,36 | 80,40 |
| 40 | 12,56 | 25,12 | 37,68 | 50,24 | 62,80 | 75,36 | 87,92 | 100,48 | 113,04 | 125,60 |
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