S235JR and S235J0 are both non-alloy structural steels with similar strength (min 235 MPa yield), but the key difference is their impact toughness, indicated by the suffix: 'JR' means impact testing at room temperature (around 20°C), while 'J0' means testing at 0°C, giving it better low-temperature performance and toughness for colder environments, with stricter P and S limits for J0.
Chemical Composition of S235JR Plate
| C max | Mn max | P max | S max | N max | Cu max | CEV max |
| 0.2 | 1.4 | 0.04 | 0.04 | 0.012 | 0.55 | 0.38 |
Chemical Composition of S235J0 Plate
|
Chemical elements |
C≤ 16mm max |
C>16mm max |
Si |
Mn max |
P |
S |
|
%,by mass |
0.17 |
0.17 |
-- |
1.40 |
0.045 |
0.045 |
Mechanical Properties of S235JR Plate
| Nominal thickness (mm): | to 3 | 3 – 100 | 100 – 150 | 150 – 250 |
| Rm - Tensile strength (MPa) Flat and long products | 360-510 | 360-510 | 350-500 | 340-490 |
| Nominal thickness (mm): | to 16 | 16–40 | 40–63 | 63–80 | 80–100 | 100–150 | 150–200 | 200–250 |
| ReH - Minimum yield strength (MPa) Flat and long products | 235 | 225 | 215 | 215 | 215 | 195 | 185 | 175 |
| KV - Impact energy (J) longitud., | -20° | 0° | +20° |
| 27 | 27 | 27 |
| Nominal thickness (mm): | to 1 | 1.5 – 2 | 2 – 2.5 | 2.5 – 3 | |
| A - Min. elongation Lo = 80 mm (%) parallel, | 17 | 18 | 19 | 20 | 21 |
| Nominal thickness (mm): | Mar-40 | 40 – 63 | 63 – 100 | 100 – 150 | 150 – 250 |
| A - Min. elongation Lo = 5,65 √ So (%) parallel, | 26 | 25 | 24 | 22 | 21 |
Mechanical Properties of S235J0 Plate
|
Thickness |
Yield StrengthReH[N/mm2] transv.min. |
TensileStrengthRm[N/mm2]transv. |
Fracture Elongation[%]transv. min. |
Notch Impact Energy1)Ch Vcomplete samplelongitud. min [J] |
|
t≤ 16mm t >16mm |
235 225 |
|
|
Degree: 0 AV: 27J |
|
t < 3mm t ≥ 3mm |
|
360-510 340-470 |
|
|
|
Up to 1.5mm 1.51-2.00mm 2.01-2.50mm 2.51-2.99mm ≥ 3mm |
|
|
16 17 18 19 24 |
S235J0 to S235JR steel are two types of structural steel that are primarily used in building construction and civil engineering. Both of these steel grades are part of the EN 10025-2 standard, which is a collection of structural steel specifications that cover hot rolled products used for structural purposes.
The main difference between S235J0 and S235JR steel is that S235J0 is not intended for use in structural applications while S235JR is. This is because S235J0 is not readily formable and does not have good weldability properties. On the other hand, S235JR is suitable for structural applications and is readily formable and weldable.
In terms of chemical composition, S235J0 and S235JR steel are both composed of iron, carbon, and other elements. However, the exact chemical composition of each grade varies slightly. For example, S235J0 contains a slightly higher amount of carbon than S235JR. Additionally, S235J0 contains a higher amount of manganese than S235JR.
In terms of mechanical properties, S235J0 and S235JR steel have similar yield strength and tensile strength values. However, S235J0 has a slightly lower elongation value than S235JR. This is due to the fact that S235J0 is not intended for use in structural applications and is not readily formable.
Overall, S235J0 and S235JR steel are two types of structural steel that are primarily used in building construction and civil engineering. The main difference between them is that S235J0 is not intended for use in structural applications while S235JR is. Additionally, S235J0 and S235JR steel have slightly different chemical compositions and mechanical properties.
