An iron-based rare earth boron-based isotropic magnet alloy, which has an alloy composition represented by T.sub.100-x-y-z(B.sub.1-nC.sub.n).sub.xRE.sub.yM.sub.z (where T is a transition metal element containing at least Fe, RE contains at least Nd, and M is one or more metal elements selected from the group consisting of Al, Si, V, Cr, Ti, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au, and Pb), 4.2 atom %≤x≤5.6 atom %, 11.5 atom %≤y≤13.0 atom %, 0.0 atom %≤z≤5.0 atom %, and 0.0≤n≤0.5, and the iron-based rare earth boron-based isotropic magnet alloy has an average crystal grain size of 10 nm to less than 70 nm as a main phase.

A soft magnetic alloy or the like combining high saturated magnetic flux density, low coercive force and high magnetic permeability μ′ having the composition formula (Fe.sub.(1−(α+β))X1.sub.αX2.sub.β).sub.(1−(a+b+c+d+e))B.sub.aSi.sub.bC.sub.cCu.sub.dM.sub.e. X1 is one more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.140<a≤0.240, 0≤b≤0.030, 0<c<0.080, 0<d≤0.020, 0≤e≤0.030, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied.

Provided is an Fe—Pt—BN-based sputtering target that has a high relative density and that suppresses particle generation.

The Fe—Pt—BN-based sputtering target has, as a residue after dissolution in aqua regia measured by a procedure below, the particle size distribution in which D90 is 5.5 μm or less and a proportion of fine particles smaller than 1 μm is 35% or less. The procedure includes: (1) cutting out an about 4 mm-square sample piece from the sputtering target, followed by pulverizing to prepare a pulverized product; (2) classifying the pulverized product using sieves of 106 μm and 300 μm in opening size and collecting a powder that has passed through the 300 μm sieve and remained on the 106 μm sieve; (3) immersing the powder in aqua regia heated to 200° C. to prepare a residue-containing solution in which the powder has been dissolved; (4) filtering the residue-containing solution through a 5A filter paper specified in JIS P 3801 and drying a residue on the filter paper at 80° C. to prepare a residue powder; (5) dispersing the residue powder in water containing a surfactant to prepare a sample solution; and (6) setting the sample solution in a particle size analyzer and measuring the particle size distribution.

A stainless steel pipe of a predetermined composition is provided that has an axial tensile yield strength of 689 MPa or more, an axial compressive yield strength/axial tensile yield strength ratio of 0.85 to 1.15, and a microstructure that is 20 to 80% ferrite phase by volume with the remainder containing an austenite phase, the stainless steel pipe having pipe end portions at least one of which has a fastening portion for an external thread or an internal thread, and having a curvature radius of 0.2 mm or more for a corner R formed by a bottom surface of a thread root and a pressure-side flank surface of the thread, measured in an axial plane section of the fastening portion.

A stainless steel pipe of a predetermined composition is provided that comprises N, Ti, Al, V, and Nb so as to satisfy the predetermined formula, the stainless steel pipe having an axial tensile yield strength of 757 MPa or more, an axial compressive yield strength/axial tensile yield strength ratio of 0.85 to 1.15, and a microstructure that is 20 to 80% ferrite phase by volume with the remainder containing an austenite phase, the stainless steel pipe having pipe end portions at least one of which has a fastening portion for an external thread or an internal thread, and having a curvature radius of 0.2 mm or more for a corner R formed by a bottom surface of a thread root and a pressure-side flank surface of the thread, measured in an axial plane section of the fastening portion.

A precipitation-hardened stainless steel alloy is disclosed including, by weight: 14.0-16.0% Cr; 6.0-7.0% Ni; 1.25-1.75% Cu; 0.5-1.0% Mo; 0.40-0.85% Nb; 0.025-0.05% C; up to 1.0% Mn; up to 1.0% Si; up to 0.1% V; up to 0.1% Co; up to 0.1% Sn; up to 0.02% N; up to 0.025% P; up to 0.05% Al; up to 0.008% S; up to 0.005% Ag; up to 0.005% Pb; up to 0.1% As; up to 0.01% Sb; and a balance of Fe. The alloy has a ratio of Nb:(C+N) of at least 15:1.

A predetermined chemical composition is contained, and a predetermined relationship of the contents of Ag, B and REM is satisfied.

A problem to be solved by the present invention is to provide an alloy that is suitable for a sputtering target material and easy to be produced by an atomization method, and, in order to solve the problem. The present invention provides an alloy containing: at least one selected from Co and Fe; B; C; and the balance being unavoidable impurities. A concentration of C in the alloy is 50 ppm or more and 950 ppm or less, and where a composition of Co, Fe and B, excluding C and the unavoidable impurities, in the alloy is represented by the general formula: (Co.sub.X-Fe.sub.100-X).sub.100-Y-B.sub.Y, where X is 0 or more and 100 or less, and Y is 10 or more and 65 or less.

A soft magnetic alloy comprising a main component having a compositional formula of ((Fe.sub.(1−(α+β))X1.sub.αX2.sub.β).sub.(1−(a+b+c))M.sub.aB.sub.bCr.sub.c).sub.1−dC.sub.d, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi and rare earth elements, “M” is selected from the group Nb, Hf, Zr, Ta, Mo, W and V, 0.030≤a≤0.14, 0.005≤b≤0.20, 0<c≤0.040, 0≤d≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when soft magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10≤P/S≤10.

A precipitation-hardened stainless steel alloy is disclosed including, by weight: 14.0-16.0% Cr; 6.0-7.0% Ni; 1.25-1.75% Cu; 0.5-1.0% Mo; 0.40-0.85% Nb; 0.025-0.05% C; up to 1.0% Mn; up to 1.0% Si; up to 0.1% V; up to 0.1% Co; up to 0.1% Sn; up to 0.02% N; up to 0.025% P; up to 0.05% Al; up to 0.008% S; up to 0.005% Ag; up to 0.005% Pb; up to 0.1% As; up to 0.01% Sb; and a balance of Fe. The alloy has a ratio of Nb:(C+N) of at least 15:1.