Hochleistungsstahlstange und Verfahren zur Herstellung einer Hochleistungsstahlstange

Details

Veröffentlichungs-Nr.

EP4772666

Anmeldetag

27. August 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

Abstract

A high-performance steel bar, according to one embodiment of the present invention, includes 0.04 to 0.09 wt% of carbon (C), 0.6 wt% or less (excluding 0) of silicon (Si), 1.45 to 2.5 wt% of manganese (Mn), 0.2 to 2.0 wt% of nickel (Ni), 0.7 wt% or less (excluding 0) of chrome (Cr), 0.001 to 0.07 wt% of niobium (Nb), 0.003 to 0.09 wt% of vanadium (V), 0.02 wt% or less (excluding 0) of phosphorus (P), 0.02 wt% or less (excluding 0) of sulfur (S), 0.5 wt% or less (excluding 0) of copper (Cu), 0.002 to 0.05 wt% of molybdenum (Mo), 0.001 to 0.07 wt% of aluminum (Al), 0.01 wt% or less (excluding 0) of nitrogen (N) and the balance of iron (Fe) and inevitable impurities and satisfies Formula 1 below, in which the yield strength (YS_un) of an unnotched specimen at -170°C is 600 MPa or more. 1668.26 × C(wt%) + 1157.54 × Si(wt%) + 81.40 × Mn(wt%) + 94.51 × Ni(wt%) + 202.33 × Cr(wt%) + 5228.70 × Nb(wt%) + 2256.36 × V(wt%) ≥ 595.01

Anmelder

Firma

Hyundai Steel Company

Land

🇰🇷 Südkorea