A piercer plug with increased recyclability is provided. A piercer plug (1) has a chemical composition of, in mass %: 0.15 to 0.30% C; 0.4 to 1.2% Si; 0.2 to 1.5% Mn; 0.1 to 2.0% Ni; 0 to 4.0% Mo and 0 to 4.0% W, where the total content of Mo and W is 1.0 to 6.0%; higher than 1.0% and not higher than 4.0% Cr; 0 to 0.2% B; 0 to 1.0% Nb; 0 to 1.0% V; 0 to 1.0% Ti; and balance Fe and impurities, the plug including a tip portion (2) and a trunk portion (3) made of the same material as the tip portion (2) and contiguous to the tip portion (2). The trunk portion (3) includes a cylindrical portion (5) having a hole used to mount a bar. The tip portion (2) is harder than the cylindrical portion (5).

The present invention relates to a high manganese steel for low temperature applications and a method for manufacturing the same. The high manganese steel contains 0.3 wt % to 0.8 wt % of C, 18 wt % to 26 wt % of Mn, 0.01 wt % to 1 wt % of Si, 0.01 wt % to 0.5 wt % of Al, 0.1 wt % or less of Ti (excluding 0%), 1 wt % to 4.5 wt % of Cr, 0.1 wt % to 0.9 wt % of Cu, 0.03 wt % or less of S (excluding 0%), 0.3 wt % or less of P (excluding 0%), 0.001 wt % to 0.03 wt % of N, 0.004 wt % or less of B (excluding 0%), and a remainder of Fe and other inevitable impurities, wherein a microstructure comprises an austenite single phase structure, and an average grain size of the austenite is 50 m or less.

An adjustable spacer with a non-hardened intermediate portion therebetween is mountable between a pair of roller bearings also mounted on a shaft such an axle or spindle or the like. The intermediate portion allows the spacer to collapse in the axial direction to maintain desired axial loads on the bearings.

A working system includes two or more container which are manufactured separately and previously and then moved to the factories or working plants, and then assembled into the continuous working system in the factories or working plants, for allowing the working system to be easily manufactured and assembled and moved or transported to the required places or positions. The containers each include one or more working zones and an aisle for entering into the working zones selectively. Two of the containers are arranged opposite to each other and parallel to each other, and the other containers are arranged opposite to and parallel to each other and disposed between the other two containers.

A method is for manufacturing a core plate having an annular core back and teeth extending from the core back toward the center. The core plate is obtained by performing a punching step, a winding step, a straining step and an annealing step. At the straining step, compressive strain is applied to the core back or the band-shaped core back that is to be the core back after winding. At the annealing step, the core back or the band-shaped core back is annealed to be recrystallized after the applying of strain.

A flat steel product for hot forming may be produced from a steel substrate that includes a steel comprising 0.1-3% by weight Mn and up to 0.01% by weight B, along with a protective coating that is applied to the steel substrate. The protective coating may be based on Al and may contain up to 20% by weight of other alloy elements. Also disclosed are methods for producing such flat steel products, steel components, and methods for producing steel components. Absorption of hydrogen is minimized during heating necessary for hot forming. This is achieved at least in part through an alloy constituent of 0.1-0.5% by weight of at least one alkaline earth or transition metal in the protective coating, wherein an oxide of the alkaline earth or transition metal is formed on an outer surface of the protective coating during hot forming of the flat steel product.

An improved method and novel apparatus to create an in situ pseudo-blackbody to enable the reliable temperature measurement of castings within an infrared oven environment and the improved, highly efficient delivery of wavelength-optimized thermal radiation to accommodate the effective heat treatment of metal alloys of any temperature, including those removed directly from the mold still containing as much as 90% of the heat of the melt, thus reducing the energy requirement for solutionizing by as much as 90%.

Disclosed is a steel whose composition includes specified wt % of: Ni, Mo, Co, Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Y+Ta+Cr+C+Al+B+Ti+N, Ni+Co+Mo, Al, Ti, N, Si, Mn, C, S, P, B, H, O, Cr, Cu, W, Zr, Ca, Mg, Nb, V, Ta, Y, the remainder being iron and impurities resulting from production. The inclusion population, observed by image analysis on a polished surface of 650 mm.sup.2 if the steel is in the form of a hot-formed part or a hot-rolled sheet and 800 mm.sup.2 if the steel is in the form of a cold-rolled sheet, does not include non-metal inclusions of an equivalent diameter greater than 10 m. Also disclosed are a product created from the steel, and a manufacturing method.

Disclosed is a steel whose composition includes specified wt % of: Ni, Mo, Co, Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Y+Ta+Cr+C+Al+B+Ti+N, Ni+Co+Mo, Al, Ti, N, Si, Mn, C, S, P, B, H, O, Cr, Cu, W, Zr, Ca, Mg, Nb, V, Ta, Y, the remainder being iron and impurities resulting from production. The inclusion population, observed by image analysis on a polished surface of 650 mm.sup.2 if the steel is in the form of a hot-formed part or a hot-rolled sheet and 800 mm.sup.2 if the steel is in the form of a cold-rolled sheet, does not include non-metal inclusions of an equivalent diameter greater than 10 m. Also disclosed are a product created from the steel, and a manufacturing method.

A cast steel shot media for performing a blasting treatment, including, at a weight ratio, 0.8% or more and 1.2% or less of C, 0.35% or more and 1.2% or less of Mn, and 0.4% or more and 1.5% or less of Si, in which a remainder has a hyper-eutectoid composition including Fe and inevitable impurities, and the cast steel shot media has a structure having a fine pearlite structure as a main constituent.