Steel grade | Type of deoxidation1) | Chemical compostion in % by wt. | Chemical composition in % by wt. | Steel Grade | |||||||||||||||||||
Code number | Material number | Ladie analysis | P | S | N2) | Additional nitrogen combining elements (e. g. at least 0.020% Al total) | Sample analysis | P | S | N2) | |||||||||||||
C | C | ||||||||||||||||||||||
for product thicknesses in mm | for product thicknesses in mm | ||||||||||||||||||||||
new | previous | 16Max | >16 32Max | >30 40Max | >40 63Max | >63 100Max | >100 | 16Max | >16 32Max | >30 40Max | >40 63Max | >63 100Max | >100 | ||||||||||
St33 | 1.0035 | 1.0033 | Optional | - | - | - | - | - | - | - | - | - | - | -< | - | - | - | - | - | - | - | - | - |
St37.2 USt37.2 RSt37.2 St37.3 | 1.0037 1.0036 1.0038 1.0116 | - 1.0112 1.0114 1.0116 | Optional U P RR | 0.17 0.17 0.17 0.17 | 0.20 0.20 0.17 0.17 | 0.20 0.20 0.17 0.17 | 0.20 0.20 0.20 0.17 | 0.20 0.20 0.20 0.17 | 0.050 0.050 0.050 0.040 | 0.050 0.050 0.050 0.040 | 0.009 0.007 0.009 - | - - - yes | 0.21 0.21 0.19 0.19 | 0.25 0.25 0.19 0.19 | 0.25 0.25 0.19 0.19 | 0.25 0.25 0.22 0.19 | 0.25 0.25 0.33 0.19 | 0.065 0.065 0.060 0.050 | 0.065 0.065 0.060 0.050 | 0.010 0.09 0.010 - | St37.2 USt37.2 RSt37.2 St37.3 | ||
St44.2 St44.3 | 1.0044 1.0144 | - - | R RR | 0.21 0.20 | 0.21 0.20 | 0.21 0.20 | 0.22 0.20 | 0.22 0.20 | 0.050 0.040 | 0.050 0.040 | 0.009 - | - yes | 0.24 0.23 | 0.24 0.23 | 0.24 0.23 | 0.25 0.23 | 0.25 0.23 | 0.060 0.050 | 0.060 0.050 | 0.010 - | St44.2 St44.3 | ||
St52.33) | 1.0570 | 1.0841 | RR | 0.204) | 0.204) | 0.22 | 0.22 | 0.22 | 0.040 | 0.040 | - | yes | 0.226) | 0.226) | 0.24 | 0.24 | 0.24 | 0.050 | 0.060 | - | St52.3 | ||
St50.2 | 1.0050 | 1.0532 | R | -5) | -5) | -5) | -5) | -5) | - | 0.050 | 0.050 | 0.009 | - | - | - | - | - | - | - | 0.060 | 0.060 | 0.010 | St50.2 |
St60.2 | 1.0060 | 1.0542 | R | -5) | -5) | -5) | -5) | -5) | - | 0.050 | 0.050 | 0.009 | - | - | - | - | - | - | - | 0.060 | 0.060 | 0.010 | St60.2 |
St70.2 | 1.0070 | 1.0632 | R | -5) | -5) | -5) | -5) | -5) | - | 0.050 | 0.050 | 0.009 | - | - | - | - | - | - | - | 0.060 | 0.060 | 0.010 | St70.2 |
1)U rimming. R killed (including balanced steel), RR special killed 2)It is permissible to axcased the maximum value indicated, provided a phosphorous content per 0.001% N of 0.005% P below the maximum value indicated is maintained. THe nitrogen content may not, however, exceed a value of 0.0012%N in the ladle analysis and 0.0014%N in the sample analysis. 3)The content may not exceed 0.55%Si and 1.60% Mn in the ladle analysis or 0.60%Si and 1.70% Mn in the sample analysis. 4)Maximum 0.22% C for steels KSt 52-3 and RoSt 52-3 according to Table 3 5)In the case of steels suitable for bright drawing according to Table 3 the following gulde vatues for the carbon content can be assumed: 0.30% C for Z St 50-2, 0.40% C for ZSt 60-2, 0.50% C for Z St 70-2 6Maximum 0.24% C for steels KSt 52-3 and RoSt 52-3 according to Table3 | |||||||||||||||||||||||
Steel grade according to Table 1 | Mechanical and technological properties 1) | |||||||||
Tensile strength Rm for product thicknesses in mm | Upper yield point ReH. for pruduct thicknesses in mm | |||||||||
Code number | Material number | < 3 | ≥ 3 ≤100 | > 100 | ≤16 | > 16 ≤ 40 | ≥ 40 ≤ 63 | ≥ 63 ≤ 80 | >80 ≤100 | > 100 |
N/mm2 | N/mm2 | |||||||||
St33 | 1.0035 | 310 up to 540 | 290 | - | 185 | 175 5) | - | - | - | - |
St37.2 USt37.2 | 1.0037 1.0035 | 360up to 510 | 340 up to 470 | by agree -ment | 235 | 225 | 215 | 205 | 195 | by agree -ment |
RSt37.2 St37.3 | 1.0038 1.0116 | 235 | 225 | 215 | 215 | 215 | ||||
St44-2 St44-3 | 1.0044 1.0144 | 430 up to 580 | 410 up to 540 | 275 | 265 | 255 | 245 | 235 | ||
St52-3 | 1.0570 | 510 up to 680 | 490 up to 630 | 355 | 345 | 335 | 325 | 315 | ||
St50-2 | 1.0050 | 490 up to 660 | 470 up to 610 | 295 | 285 | 275 | 265 | 255 | ||
St60-2 | 1.0060 | 590 up to 770 | 570 up to 710 | 335 | 325 | 315 | 305 | 295 | ||
St70-2 | 1.0070 | 690 up to 900 | 670 up to 830 | 365 | 355 | 345 | 335 | 325 | ||
1) The values of the tensile test and the bending test apply to longitudinal specimens apart from flat products ≥ 600mm width from which transverse specimens are to be taken. 2) U hot formed, untreated, N normalized. 3) For notched-bar impact specimens with a width of less than 10mm the specifications 4) The test result is the average value from three tests. Only one individual value may be lower than the minimum average value of 23 or 27J, and then only by a maximum of 30%. 5) This value applies only to thicknesses up to 25mm. | ||||||||||
Steel grade Code- number | Mechanical and technological properties 1) | ||||||||||||||||||||
Position of specimen | Eiongation at rupture | Bending test (180degree) | ISO V-notch specimens (Irongitudinal) | ||||||||||||||||||
(Gauge length Lo = 80mm) | (Gauge length Lo = 5 do) | Position of specimen | (a Thickness of specimen) for product thicknesses in mm | Condition of treatment 2) | Test tem- pera- ture degree | for product thicknesses in mm | |||||||||||||||
for product thicknesses in mm | |||||||||||||||||||||
≥0.5 <1 | ≥1<1.5 | ≥1.5 <2 | ≥2 <2.5 | ≥2.5 <3 | ≥ 3 ≤40 | ≥ 40 ≤63 | ≥ 63 ≤100 | >100 | <3 | ≥ 3 ≤63 | ≥63 ≤100 | >100 | ≥ 10 ≤16 3) | ≥ 16 ≤63 | ≥ 63 ≤100 | >100 | |||||
% min. | Mandrel diameter | J min. | |||||||||||||||||||
St 33 | longitu- dinal tran- sverse | 10 8 | 11 9 | 12 10 | 13 11 | 14 12 | 18 16 | - | - | - | longitudinal transverse | 2.5a 3a | 2.5a 3a | - | - | U,N | - | - | - | - | - |
St 37.2 USt 37.2 RSt 37.2 | 17 15 | 18 16 | 19 17 | 20 18 | 21 19 | 26 24 | 25 23 | 24 22 | by agree -ment | 0.5a 1.5a | 1a 2a | 1.5a 2.5a | by agree -ment | U,N U,N U,N | +20 +20 +20 | 27 27 27 | - - 27 | - - - | - - - | ||
St 37.3 | 0.5a 1a | 1a 1.5a | 1.5a 2a | U N | ±0 -20 | 27 27 | 27 27 | 23 23 | by agree -ment | ||||||||||||
St 44.2 | 14 12 | 15 13 | 16 14 | 17 15 | 18 16 | 22 20 | 21 19 | 20 18 | 2a 2.5a | 2.5a 3a | 3a 3.5a | U,N | +20 | 27 | - | - | |||||
St 44.3 | U N | ±0 -20 | 27 27 | 27 27 | 23 23 | by agree -ment | |||||||||||||||
St 52.3 | 14 12 | 15 13 | 16 14 | 17 15 | 18 16 | 22 20 | 21 19 | 20 18 | 2a 2.5a | 2.5a 3a | 3a 3.5a | U N | ±0 -20 | 27 27 | 27 27 | 23 23 | by agree -ment | ||||
St 50.2 | 12 10 | 13 11 | 14 12 | 15 13 | 16 14 | 20 18 | 19 17 | 18 16 | - | - | - | - | - | U,N | - | - | - | - | - | ||
St 60.2 | 8 6 | 9 7 | 10 8 | 11 0 | 12 10 | 16 14 | 15 13 | 14 12 | - | - | - | - | - | U,N | - | - | - | - | - | ||
St 70.2 | 4 3 | 5 4 | 6 5 | 7 6 | 8 7 | 11 10 | 10 9 | 9 8 | - | - | - | - | - | U,N | - | - | - | - | - | ||
