Abstract: A corrosion-resistant carbon sheet steel with good stamping characteristics is disclosed as relating to compositions for steel resistant to atmospheric corrosion, obtained from a basis composition containing elements such as C, Mn, P, S, Al, Si, and Cu, to which are added in various ways the elements Sb, V, Cr, and Ni which make possible obtaining properties such as high resistance to corrosion associated with the stamping characteristics.

Abstract: The present invention provides a steel for a corrosion-resistant rolling part having excellent corrosion resistance, high quenching and tempering hardness, and excellent workability for use in linear bearings, ball screws and rolling bearings of industrial machinery which must be strictly prevented from undergoing environmental contamination due to oil and grease. The steel comprises 0.5% or more and 0.7% or less by weight of carbon, 0.1% or more and 1.5% or less by weight of silicon, 0.1% or more and 2.0% or less by weight of manganese, 3.0% or more and less than 6.0%, preferably 4.0% or more and 5.5% or less, by weight of chromium, 0.05% or less by weight of phosphorus, 0.03% or less, preferably 0.01% or less, by weight of sulfur and 0.0015% or less by weight of oxygen, and may further comprise at least one of 0.05% or more and 2.0% or less, preferably 0.05% or more and 1.0% or less, by weight of molybdenum and 0.1% or more and 0.8% or less, preferably 0.2% or more and 0.

Abstract: An iron/copper/chromium alloy material for a high-strength lead frame or pin grid array, which comprises 20 to 90% by weight of Cu and 2.5 to 12% by weight of Cr, with the balance being mainly iron, and which has an average grain size number of at least 10 in each of the iron/chromium phase and the copper phase, is prepared by continuous casting, cold-working, and aging.

Abstract: A heat-resisting steel suitable for use in valve parts of internal combustion engine is disclosed, which consists essentially by weight percentage of 0.3-0.5% of C, more than 1.0% to 2.5% of Si, 0.1-2.0% of Mn, 0.5-7.0% of Cr, 0.3-2.0% of Mo and 0.1-1.0% of V as basic ingredients, at least one of 0.3-2.0% of Cu and 0.001-0.05% of REM as sub-ingredients and if necessary, at least one of 0.1 to less than 2.0% of Ni, 0.1-1.5% of W and 0.03-1.0% of Nb+Ta, and the balance of Fe and inevitable impurities.