1.0577 previous designation St 52-3, S355J2G3, corresponds to ČSN 11503. (ČSN 11523 corresponds to S355J0, the difference from S355J2 is in KV, which is carried out at 0°C).
Non-alloyed quality structural steel according to EN 10025-2 with guaranteed weldability.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Cu |
max. 0,20*
max. 0,22** |
max. 0,55 |
max. 1,60 |
max. 0,025 |
max. 0,025 |
- |
- |
- |
max. 0,55 |
*/ for a product with a nominal thickness up to and including 40 mm
**/ for a product with a nominal thickness over 40 mm |
Mechanical properties for tests in the longitudinal direction
| Minimum yield strength Re in MPa for products of nominal thickness in mm |
| >16≤40 |
>40≤63 |
>63≤80 |
>80≤100 |
>100≤150 |
>150≤200 |
>200≤250 |
>250≤400 |
| 345 |
335 |
325 |
315 |
295 |
285 |
275 |
265 |
| Tensile strength Rm in MPa for products of nominal thickness in mm |
| >3≤100 |
>100≤400 |
| 470-630 |
450-600 |
| Minimum impact test KV in J at -20°C for products of nominal thickness in mm |
| ≤400 |
| 27 |
In stock D 30 – D 300 mm without heat treatment (S355J2+AR), D 310 – D 410 mm normalized (S355J2+N). Some stock items may have the older designation S355J2G3.
1.1191 (1.1201), corresponds to ČSN 12050
Unalloyed carbon steel for quenching and tempering according to EN 10083-2. Higher content S in C45R improves machinability.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Cr + Mo + Ni |
| 0,42-0,50
|
max. 0,40
|
0,50-0,80
|
max. 0,030
|
max. 0,035*
0,020-0,040** |
max. 0,40
|
max. 0,10
|
max. 0,40 |
max. 0,63 |
*/ for C45E
**/ for C45R |
Mechanical properties
| |
Diameter mm |
Re min. MPa |
Rm MPa |
A5 min. % |
Z min. % |
KV min. J |
| quenched and tempered |
16<d≤40 |
430 |
650-800 |
16 |
40 |
25 |
| 40<d≤100 |
370 |
630-780 |
17 |
45 |
25 |
| normalized |
16<d≤100 |
305 |
min. 580 |
16 |
- |
- |
| 100<d≤250 |
275 |
560 |
16 |
- |
- |
In stock D 30 – D 300 mm without heat treatment (C45E+AR), D 310 – D 410 mm normalized (C45E+N). Some stock items may be marked C45R or C45.
1.1221 (1.1223), corresponds to ČSN 12061
Unalloyed carbon steel for quenching and tempering according to EN 10083-2. Higher content S in C45R improves machinability.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Cr + Mo + Ni |
| 0,57-0,65 |
max. 0,40 |
0,60-0,90 |
max. 0,030 |
max. 0,035*
0,020-0,040** |
max. 0,40 |
max. 0,10 |
max. 0,40 |
max. 0,63 |
*/ for C60E
**/ for C60R |
Mechanical properties
| |
Diameter mm |
Re min. MPa |
Rm MPa |
A5 min. % |
Z min. % |
KV min. J |
| quenched and tempered |
16<d≤40 |
520 |
800-950 |
13 |
30 |
- |
| 40<d≤100 |
450 |
750-900 |
14 |
35 |
- |
| normalized |
|
|
|
|
|
|
| |
310 |
650 |
11 |
- |
- |
In stock D 30 – D 130 mm without heat treatment (C60E+AR). Some stock items may be marked as C60R or C60.
1.7131 (1.7139), corresponds to ČSN 14220
Steel for case hardening according to EN 10084. Higher content S in 16MnCrS5 improves machinability.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
B |
| 0,14-0,19 |
max. 0,40 |
1,00-1,30 |
max. 0,035 |
max. 0,035*
0,020-0,040* |
0,80-1,10 |
- |
- |
- |
*/ for 16MnCr5
**/ for 16MnCrS5 |
HB hardness values for heat treatment conditions
| annealed for cutability (+S) |
soft annealed (+A) |
annealed to a ferritic-pearlitic structure (+FP) |
| cuttable even in +AR state |
max. 207 |
140-187 |
In stock D 30 – D 130 mm without heat treatment (16MnCr5+AR) and D 55 – D 320 mm soft annealed (16MnCr5+A). Some stock items may be marked as 16MnCrS5. Most of these stock items are marked as 16/20MnCr5 (or 16/20MnCrS5).
1.7147 (1.7149), corresponds to ČSN 14221
Steel for case hardening according to EN 10084. Higher content of S in 16MnCrS5 improves machinability.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
B |
| 0,17-0,22 |
max. 0,40 |
1,10-1,40 |
max. 0,035 |
max. 0,035*
0,020-0,040* |
1,00-1,30 |
- |
- |
- |
*/ for 20MnCr5
**/ for 20MnCrS5 |
HB hardness values for heat treatment conditions
| annealed for cutability (+S) |
soft annealed (+A) |
annealed to a ferritic-pearlitic structure (+FP) |
| 255 |
max. 217 |
152-201 |
In stock D 30 – D 130 mm without heat treatment (20MnCr5+AR) and D 55 – D 320 mm soft annealed (20MnCr5+A). Some stock items may be marked as 20MnCrS5. Most of these stock items are marked as 16/20MnCr5 (or 16/20MnCrS5).
1.7225 (1.7227), corresponds to ČSN 15142
Low-alloy chrome-molybdenum steel for quenching and tempering according to EN 10083-3. The higher content of S in 42CrMoS4 improves machinability.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
V |
| 0,38-0,45 |
0,40 |
0,60-0,90 |
max. 0,025 |
max. 0,035*
0,020-0,040* |
0,90-1,20 |
0,15-0,30 |
- |
- |
*/ for 42CrMo4
**/ for 42CrMoS4 |
Mechanical properties
| |
Diameter mm |
Re min. MPa |
Rm MPa |
A5 min. % |
Z min. % |
KV min. J |
| quenched and temperde |
16<d≤40 |
750 |
1000-1200 |
11 |
45 |
35 |
| 40<d≤100 |
650 |
900-1100 |
12 |
50 |
35 |
| 100<d≤160 |
550 |
800-950 |
13 |
50 |
35 |
| 160<d≤250 |
500 |
750-900 |
14 |
55 |
35 |
| 250<d≤500 |
480 |
700-850 |
|
|
|
| 500<d≤900 |
370 |
650-850 |
|
|
|
In stock D 30 – D 410 mm all quenched and tempered (42CrMo4+QT), some stock items may be marked as 42CrMoS4.
1.6582, corresponds to ČSN 16343
Alloyed Cr-Mo-Ni steel for quenching and tempering with high hardenability according to EN 10083-3.
Chemical composition from the melt in %
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
V |
| 0,30-0,38 |
0,40 |
0,50-0,80 |
max. 0,025 |
max. 0,035 |
1,30-1,70 |
0,15-0,30 |
1,30-1,70 |
- |
Mechanical properties
| |
Průměr mm |
Re min. MPa |
Rm MPa |
A5 min. % |
Z min. % |
KV min. J |
| quenched and temperde |
16<d≤40 |
900 |
1100-1300 |
10 |
45 |
45 |
| 40<d≤100 |
800 |
1000-1200 |
11 |
50 |
45 |
| 100<d≤160 |
700 |
900-1100 |
12 |
55 |
45 |
| 160<d≤250 |
600 |
800-950 |
13 |
55 |
45 |
Some diameters in the range D 80 – D 330 mm are in stock, all quenched and tempered (34CrNiMo6+QT).
Allowable diameter deviations
Diameter tolerance of hot rolled bars (corresponds to EN 10060)
| D 26 - 35 mm |
D 36 - 50 mm |
D 52 - 80 mm |
D 85 - 100 mm |
D 105 - 120 mm |
D 125 - 160 mm |
D 165 - 200 mm |
D 220 mm |
D 250 mm |
| +/-0,6 mm |
+/-0,8 mm |
+/-1,0 mm |
+/-1,3 mm |
+/-1,5 mm |
+/-2,0 mm |
+/-2,5 mm |
+/-3,0 mm |
+/-4,0 mm |
| Hot rolled bars with diameters greater than 250 mm are produced with a tolerance of +/-6.0 mm. |
Diameter tolerance of forged bars
Forged + rough turned bars are mostly produced with a tolerance of -0/+3 mm.
Forged + rolled bars are mostly produced with a tolerance of -0/+6 mm.
Ovality is measured at any point at least 100 mm from the end of the bar. It must not exceed 75% of the tolerance field of the diameter (corresponds to EN 10060).
Sraightness of bars
For bars 25 ≤ d ≤ 80 mm, the straightness tolerance is 0.4% of the measured length, for bars 80 < d ≤ 250, the straightness tolerance is 0.25% of the measured length (corresponds to EN 10060).
