These fine-grain structural steel grades are characterised by a minimum yield strength of 275 - 460 MPa, by good weldability and high resistance to brittle cracking. Fine-grain structural steels are used above all for manufacturing vessels for pressurised gas (LPG, butane and propane tanks), pressure vessels, steam boiler parts, pressure piping, compressors etc.
Main grades of Fine-grain structural steels are :
Material #: 1.8818, 1.8819, 1.8823, 1.8834, 1.8825, 1.8836, 1.8827, 1.8838.
EN 10113-3: S275M, S275ML, S355M, S355ML, S420M, S420ML, S460M, S460ML.
SEW 083: StE 275 TM, TStE 275 TM, StE 355 TM, TStE 355 TM, StE 420 TM, TStE 420 TM, StE 460 TM, TStE 460 TM.
NFA 36-201: E 355 R, E 355 FP, E 420 R, E 420 FP, E 460 R, E 460 FP.
UNI 7382: Fe E 275 KGTM, Fe E 275 KTTM, Fe E 355 KGTM, Fe E 355 KTTM, Fe E 460 KGTM, Fe E 460 KGTM.
BS 4360: 50 EE, 55 EE.
ASTM: A 572 Gr. C, A 633 Gr. C, A 572 Gr. 60, A 633 Gr. E, A 572 Gr. 65
Material # : 1.049, 1.0491, 1.0545 , 1.0546, 1.8902, 1.8912
EN 10111: S275N, S275NL, S355N, S355NL, S420N, S420NL,
DIN 1614/2: StE 285, TStE 285, StE 3555, TStE 355, StE 420, TStE 420,
NFA 36-301: E 355 R, E 355 FP, E 420 R, E 420 FP
UNI 5867: Fe E 275 KGN, Fe E 275 KTN, Fe E 355 KGN, Fe E 355 KTN, Fe E 420 KGN.
BS 1449 : 43 EE, 50 E, 50 EE, 50 F
UNE 36.093 : AE 355 KG , AE 355 KT, AE 420 KG
ASTM : A 572 Gr. 42, A 633 Gr. A, A 572 Gr. 50 A 633 Gr. C/D , A 537 CI. 1 A 255 Gr. D A 633 Gr. E / A 572 Gr. 60 / A 738 Gr. C
JIS G3131: SM490A
| Material # | EN 10111 | DIN 1614/2 | NFA 36-301 | UNI 5867 | BS 1449 | ASTM - SAE |
| 1.049 | S275N | StE 285 | Fe E 275 KGN | A 572 Gr. 42 | ||
| 1.0491 | S275NL | TStE 285 | Fe E 275 KTN | 43 EE | A 633 Gr. A | |
| 1.0545 | S355N | StE 355 | E 355 R | Fe E 355 KGN | 50 E | A 572 Gr. 50 |
| 1.0546 | S355NL | TStE 355 | E 355 FP | Fe E 355 KTN | 50 EE | A 633 Gr. C, D / A 537 CI. 1 |
| 1.8902 | S420N | StE 420 | E 420 R | Fe E 420 KGN | A 255 Gr. D | |
| 1.8912 | S420NL | TStE 420 | E 420 FP | 50 F | A 633 Gr. E / A 572 Gr. 60 / A 738 Gr. C |
|
| Material # | EN 10113-3 | SEW 083 | NFA 36-201 | UNI 7382 | BS 4360 | ASTM |
| 1.8818 | S275M | StE 275 TM | Fe E 275 KGTM | |||
| 1.8819 | S275ML | TStE 275 TM | Fe E 275 KTTM | |||
| 1.8823 | S355M | StE 355 TM | E 355 R | Fe E 355 KGTM | A 572 Gr. C | |
| 1.8834 | S355ML | TStE 355 TM | E 355 FP | Fe E 355 KTTM | 50 EE | A 633 Gr. C |
| 1.8825 | S420M | StE 420 TM | E 420 R | A 572 Gr. 60 | ||
| 1.8836 | S420ML | TStE 420 TM | E 420 FP | A 633 Gr. E | ||
| 1.8827 | S460M | StE 460 TM | E 460 R | Fe E 460 KGTM | A 572 Gr. 65 | |
| 1.8838 | S460ML | TStE 460 TM | E 460 FP | Fe E 460 KGTM | 55 EE | A 572 Gr. 65 |
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