Application
Cold rolled sheets from low carbon non-alloyed structural steels are used for production of flat or cold-formed structural elements. Their application is determined by the minimum value of the yield point, or by the tensile strength.
Germany DIN 1623/86 T2 |
USA | Czech Rep.,Slovakia SN, STN |
U.S.Steel Košice, s.r.o. |
|
|---|---|---|---|---|
| ASTM A 611/97 | SAE | |||
| Gr.A, B | 11 343 | KOSIL 200S | ||
| St 37-2G | Gr. C type 1,2 | 1015 1) | 11 375* |
KOSIL 215S |
| St 37-3G | ||||
| St 44-3G | Gr. D type 1,2 | 11 448 * | KOSIL 245S | |
| St 52-3G 1) | 11 523 | KOSIL 325S | ||
1) By agreement. *Company's standard. |
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Steel is suitable for non-structural presswork, for forming;
DD12 - steel is suitable for medium-structural presswork;
DD13 - steel is suitable for presswork and surface treatment;
DD14 - steel is suitable for structural presswork, surface treatment.
Chemical properties
Quality according to DIN 1623/86 T2 U.S.Steel Košice, s.r.o. |
Heat analysis in % | ||||||
|---|---|---|---|---|---|---|---|
| CMAX | PMAX | SMAX | AlMAX | NMAX | MnMAX | SiMAX | |
| KOSIL 200 S | 0.16 | 0.025 | 0.020 | 0.60 | 0.030 | ||
| St 37-2G | 0.17 | 0.040 | 0.035 | 0.009 | |||
| St 37-3G | 0.17 | 0.040 | 0.035 | 0.007 | |||
| KOSIL 215 S | 0.16 | 0.025 | 0.020 | 0.80 | 0.030 | ||
| St 44-3G | 0.20 | 0.040 | 0.035 | ||||
| KOSIL 245 S | 0.20 | 0.020 | 0.020 | 0.02 | |||
| St 52-3G | 0.20 | 0.040 | 0.035 | ||||
| KOSIL 325 S | 0.20 | 0.040 | 0.020 | 0.02 | |||
Mechanical properties
Quality according to DIN 1623/86 T2 U.S.Steel Košice, s.r.o. |
Mechanical properties 1) | |||
|---|---|---|---|---|
Rp0.2 MIN (MPa) |
Rm (MPa) |
AMIN(%) L0=80 mm |
Angle of bend 180° 2) |
|
| KOSIL 200 S | 200 | 310 - 430 | 22 | 0,5.a |
| St 37-2G | 215 | 360 - 510 | 20 | 0,5.a |
| St 37-3G | 215 | 360 - 510 | 20 | 0,5.a |
| KOSIL 215 S | 215 | 360 - 470 | 20 | 0,5.a |
| St 44-3G | 245 | 430 - 580 | 18 | 1.a |
| KOSIL 245 S | 245 | 430 - 550 | 18 | 1.a |
| St 52-3G | 325 | 510 - 680 | 16 | 1.a |
| KOSIL 325 S | 325 | 510 - 650 | 16 | 1.a |
1)Samples are taken longitudinally to rolling direction. 2)a - sheet thickness in mm |
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Technical delivery regulations, dimensions, metallurgical certificate
| STANDARDS | Germany DIN 1623/86 T2 |
Japan JIS G 3125/87 |
USA | U.S.Steel Košice, s.r.o. | ||
|---|---|---|---|---|---|---|
| ASTM | SAE | |||||
| Technical delivery regulations |
sheets | DIN 1623/86 T2 |
JIS G 3125/87 |
A 568/98 | ČSN, STN 42 0117/74 |
|
| coils | ||||||
| longitudinally cut strips |
ČSN, STN 42 0108/84 |
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| Dimensions | sheets | DIN 1541/75 |
JIS G 3141/87 |
A 568/98 | ČSN, STN 42 6317/74 |
|
| coils | ||||||
longitudinally cut strips |
ČSN, STN 42 5351/84 |
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| Metallurgical certificate | EN 10204/91+A1/95 | EN 10204/91+A1/951) | ||||
| 1) and in accordance with relevant technical and delivery regulations. | ||||||
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