FIELD: metallurgy.
SUBSTANCE: invention relates to high-strength multiphase steel with minimum tear resistance of 580 MPa mainly with two-phase structure for cold- or hot-rolled steel strip with improved formability, in particular for production of lightweight constructions for vehicles, consisting of elements by wt %: C 0.075 to ≤0.105; Si 0.200 to ≤0.300; Mn 1.000 to ≤2.000; Cr 0.280 to ≤0.480; Al 0.010 to ≤0.060; R≤0.020; Nb≥0.005 to ≤0.025; N≤0.0100; S≤0.0050; the rest is iron including usual steel accompanying elements not listed above.
EFFECT: increased strength.
16 cl, 9 dwg
Title |
Year |
Author |
Number |
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