Tata Steel Strip Products IJmuiden offers a complete range of micro-alloyed and rephosphorised high-strength steels in cold-rolled uncoated condition for applications where thin gauges and high strengths are required. The range of high-strength steels is used by various carmakers and subcontractors for inner parts where they benefit from their dent-resistance, crash-resistance, formability and good weldability.

The micro-alloyed grades have high strength levels through precipitation and grain refinement hardening and therefore cold forming is limited. By using the right alloying elements, high mechanical resistance is reached while maintaining low levels of alloying elements and good weldability. The rephos grades present a high mechanical resistance and a good suitability for cold forming due to solid solution hardening by phosphorus. These grades are used in car body panels and structural components due to their good impact and fatigue resistance properties. 

Tata Steel Strip Products IJmuiden supplies high-strength micro-alloyed (HSLA) steel which complies to European standard EN 10268 (2006). As an alternative for conventional cold-rolled high-strength steels in heavier gauges (above 1.2 mm) we recommend our Ymagine products.

Cold-rolled high-strength grades are used for various applications including the following:

• automotive parts
  chassis members
  seat parts
  reinforcements
• construction parts
• precision tubes
• furniture

Tata Steel Strip Products IJmuiden can supply the following cold-rolled high-strength steel grades:

Micro-alloyed grades
EN 10268, 2006 Grade	EN 10268, 1999 Grade
HC260LA	H240LA
HC300LA	H280LA
HC340LA	H320LA
HC380LA	H360LA
HC420LA	H400LA
Rephosphorised grades Grade	SEW 094 Grade
HC220P	ZSt E220P
HC260P	ZSt E260P

The available grades have the following mechanical properties measured perpendicular to the rolling direction (transverse test pieces):

 

EN 10268, 2006	Yield Strength Re 1) Min - Max	Tensile Strength Rm Min - Max	Elongation A80 3) Min.	r90 2) Min.	n90 Min.
Grade	N/mm2	N/mm2	%
HC260LA	260 - 330	350 - 430	26	-	-
HC300LA	300 - 380	380 - 480	23	-	-
HC340LA	340 - 420	410 - 510	21	-	-
HC380LA	380 - 480	440 - 560	19	-	-
HC420LA	420 - 520	470 - 590	17	-	-
HC220P	220 - 270	320 - 400	32	1.3	0.16
HC260P	260 - 320	360 - 440	29	-	-

1) If the yield strength is pronounced (yield flag), the values apply to the lower yield point (R_eL).

²⁾ For products with thickness > 2 mm the minimum r₉₀ is reduced by 0.2.

³⁾ When thickness ≤ 0.7 mm, the minimum value for elongation is reduced by 2%.

Cold-rolled high-strength steels supplied by Tata Steel Strip Products IJmuiden comply to the following heat analysis with maximum values in weight percentages unless otherwise shown:

EN 10268, 2006 Grade	C Max.	Mn Max.	Si Max.	P Max.	S Max.	Al Min.	Ti Max.	Nb Max.
HC260LA	0.10	0.6	0.5	0.025	0.025	0.015	0.15	-
HC300LA	0.10	1.0	0.5	0.025	0.025	0.015	0.15	0.09
HC340LA	0.10	1.1	0.5	0.025	0.025	0.015	0.15	0.09
HC380LA	0.10	1.6	0.5	0.025	0.025	0.015	0.15	0.09
HC420LA	0.10	1.6	0.5	0.025	0.025	0.015	0.15	0.09
HC220P	0.07	0.7	0.5	0.08	0.025	0.015	-	-
HC260P	0.08	0.7	0.5	0.1	0.025	0.015	-	-

Cold-rolled high-strength steels are available in the following dimensions:

Dimensions in mm.

Thickness		Max. Width
from    -	up to	HC260LA	HC300LA	HC340LA	HC380LA	HC420LA	HC220P	HC260P
0.50	0.55	-	-	-	-	-	1500	1500
0.55	0.60	-	-	-	-	-	1500	1500
0.60	0.65	1530	1420	1220	1120	1120	1800	1800
0.65	0.70	1650	1530	1330	1230	1190	1800	1800
0.70	0.80	1740	1630	1430	1310	1210	1800	1800
0.80	0.90	1800	1690	1480	1350	1260	1800	1800
0.90	1.00	1850	1730	1530	1390	1290	1800	1800
1.00	1.10	1880	1770	1570	1430	1320	1800	1800
1.10	1.20	1920	1790	1610	1470	1370	1800	1800
1.20	1.30	1940	1820	1660	1500	1390	1800	1800
1.30	1.40	1970	1840	1700	1510	1370	1800	1800
1.40	1.50	1970	1860	1700	1500	1350	1800	1800
1.50	1.60	1970	1860	1650	1450	1330	1800	1800
1.60	1.70	1970	1860	1650	1450	1310	1800	1800
1.70	1.80	1950	1830	1630	1430	1300	1800	1800
1.80	1.90	1920	1800	1600	1410	1280	1800	1800
1.90	2.00	1880	1770	1570	1390	1260	1800	1800
2.00	2.10	1840	1740	1540	1360	1240	1800	1800
2.10	2.20	1800	1710	1470	1340	1220	1800	1800
2.20	2.30	1760	1670	1400	1320	1210	1700	1700
2.30	2.40	1730	1650	1340	1300	1190	1700	1700
2.40	2.50	1690	1620	1290	1280	1170	1600	1600
2.50	2.60	1650	1590	1240	1240	1150	1600	1600
2.60	2.70	1610	1550	1190	1190	1130	1600	1600
2.70	2.80	1570	1520	1150	1150	-	1400	1400
2.80	2.90	1530	1490	1110	1110	-	1400	1400
2.90	3.00	1500	1470	1070	1070	-	1400	1400

Minimum width is 750 mm for all grades