Analysis of Steel Used For Steel Profiles and Hubs of Combined Roller Bearings
DIN 1629 sheet 3-ST52 (STEEL PROFILES)
CARBON ................0.20% max
SILICON.................0.55% max
MANGANESE...... ....1.50% max
PHOSPHOROUS........0.050% max
SULPHUR...............0.050% max
ALUMINIUM............NIL
MIN YIELD)...... UP TO 16mm (flange thickness) 360 N/mm2; 16 to 30mm (flange thickness) 350 N/mm2; 30 to 50mm (flange thickness) 340 N/mm2
TENSILE STRENGTH..... 500 to 640 N/mm2
TEST PRESSURE.......50 BAR max
ST52 (BEARING HUBS)
CARBON..................0.18%
SILICON..................0.30%
MANGANESE...........1.50%
OTHER....................0.47%
MECHANICAL PROPERTIES
| STEEL GRADE | CONDITION | YIELD MPa |
TENSILE MPa |
ELONGATION % | HARDNESS APPROX HB |
IMPACT STRENGTH KV |
|
| COLD ROLLED ST52 | NON- HEAT TREATED | 740 | 760 | 10 | 250 | ||
| NORMALISED | 330 | 490 | 30 | 165 | -60 C | ||
| HOT ROLLED ST52 | NON-HEAT TREATED | 330 | 490 | 21 | 180 |
We are reliably informed that ST52 & ST52-3 equates to EN36