Abstract: A high strength chromium containing steel sheet having a tensile strength of at least 40 kgf/mm.sup.2, and excellent in corrosion resistance and workability, comprising, by weight, C:up to 0.030%, Si:up to 2.30%, Mn:up to 3.0%, P:more than 0.0005% and not more than 0.150%, S:up to 0.010%, Ni:up to 2.0%, Cu:more than 0% and not more than 2.0%, Cr:not less than 5.0% and less than 10.0%, N:up to 0.030%, V:not less than 0.01% and not more than 0.10%, and optionally at least one of 0.01 to 0.30% of Ti, 0.01 to 0.30% of Nb, 0.01 to 0.30% of Zr, 0.01 to 0.20% of Al and 0.0002 to 0.0200% of B, the amounts of Si, Mn, P, Ni and Cu being adjusted so that the relation:Si+Mn+10P+Ni+Cu>1.0% may be satisfied, the balance being iron and unavoidable impurities.

Abstract: In order to provide a pipe joint of stainless steel including more than 10% of Cr which joint has excellent shape memory effect, the stainless steel comprises up to 0.10% of C, 3.0 to 6.0% of Si, 6.0 to 25.0% of Mn, up to 7.0% of Ni, more than 10.0 to 17.0% of Cr, 0.02 to 0.30% of N, 2.0 to 10.0% of Co, and optionally one or more selected from 0.05 to 0.8% of Nb, 0.05 to 0.8% of V, 0.05 to 0.8% of Zr, 0.05 to 0.8% of Ti, up to 2.0% of Mo and up to 2.0% of Cu and the alloying components are balanced so that no .delta.-ferritic phase may substantially appear in the annealed condition. Since the joint is treated so that it has such a shape memory effect that it will recover the memorized original shape with a smaller diameter when heated to an appropriate temperature, it can fasten a pipe or pipes merely by heating.

Abstract: A shape memory stainless steel containing more than 10% by weight of Cr excellent in resistance to stress corrosion cracking and having sufficient function as a shape memory alloy, which comprises, by weight, up to 0.10% of C, 3.0 to 6.0% of Si, 6.0 to 25.0% of Mn, up to 7.0% of Ni, more than 10.0% and not more than 17.0% of Cr, 0.02 to 0.3% of N, 2.0 to 10.0% of Co and more than 0.2% and not more than 3.5% of Cu, and at least one selected from up to 2.0% of Mo, 0.05 to 0.8% of Nb, 0.05 to 0.8% of V, 0.05 to 0.8% of Zr, 0.05 or 0.8% of Ti, the balance being Fe and unavoidable impurities, the alloying components being adjusted so that a D value is not less than-26.0, wherein the D value is defined by the following equation:D=Ni+0.30.times.Mn+56.8.times.C+19.0.times.N+0.73.times.Co+Cu -1.85.times.[Cr+1.6.times.Si+Mo+1.5.times.(Nb+V+Zr+Ti)].

Abstract: A chromium containing steel sheet excellent in corrosion resistance and workability, comprising, by weight, C:up to 0.030%, Si:up to 0.5%, Mn:up to 0.5%, P:up to 0.040%, S:up to 0.010%, Ni:up to 0.3%, Cu:up to 0.3%, Cr: not less than 5.0% and less than 11.0%, N:up to 0.030%, V:not less than 0.01% and not more than 0.10%, and optionally at least one of 0.01 to 0.30% of Ti, 0.01 to 0.30% of Nb, 0.01 to 0.30% of Zr, 0.01 to 0.20% of Al and 0.0002 to 0.0200% of B, the amounts of Si, Mn, P, Ni and Cu being adjusted so that the relation:Si+Mn+10P+Ni+Cu.ltoreq.1.0% may be satisfied, the balance being iron and unavoidable impurities.

Abstract: Stainless steel sheets are plated with zinc and further phosphated so as to have chromaticness indices of L=45-53, a=0.0-0.4 and b=1.3-4.4. Thus treated stainless steel sheets have sufficient strength, excellent corrosion resistance and a color well harmonizing with other building materials and environment and do not suffer from color change for a prolonged period of time.

Abstract: An austenitic stainless steel substantially comprising not more than 0.15% by weight of C, 2.56 - 4.0% by weight of Si, not more than 2.0% by weight of Mn, 8 - 22% by weight of Ni, 16 - 25% by weight of Cr, 0.001 - 0.05% by weight of at least one alkaline earth metal, 0 - 2.5% by weight of Al, 0 - 0.1% by weight of at least one rare earth metal, 0 - 1.0% by weight of at least one of Nb, Ta, Ti, Zr and Hf, 0 - 2.0% by weight of Cu and balance Fe is disclosed. This class of steels are superior to the known high Si oxidation-resisting austenitic stainless steels in oxidation resistance especially in resistance to scaling, are of the same level in high temperature strength, and are much less expensive.

Abstract: An austenitic stainless steel substantially comprising not more than 0.15% by weight of C, 2.56 - 4.0% by weight of Si, not more than 2.0% by weight of Mn, 8 - 22% by weight of Ni, 16 - 25% by weight of Cr, 0.001 - 0.05% by weight of at least one alkaline earth metal, 0 - 2.5% by weight of Al, 0 - 0.1% by weight of at least one rare earth metal, 0 - 1.0% by weight of at least one of Nb, Ta, Ti, Zr and Hf, 0 - 2.0% by weight of Cu and balance Fe is disclosed. This class of steels are superior to the known high Si oxidation-resisting austenitic stainless steels in oxidation resistance especially in resistance to scaling, are of the same level in high temperature strength, and are much less expensive.

Abstract: An austenitic stainless steel comprising not more than 0.15% by weight of C, 1.5 - 4.0% by weight of Si, not more than 2% by weight of Mn, 17.0 - 30.0% by weight of Ni, 24.0 - 32.0% by weight of Cr, 0.5 - 2.5% by weight of Al, 0.001 - 0.100% by weight of Ca, 0.001 - 0.100% by weight of at least one rare earth metal, 0 - 1.0% by weight of at least one of Ti, Zr, Hf, Nb and Ta, and balance Fe and incidental impurities is disclosed. Steels of this class are superior to the known high Si oxidation-resisting austenitic stainless steels in scaling and nitriding resistance and with stand prolonged use under the circumstances where the steels undergo cyclic heating to high temperatures.