Drawings by Adolf Martens

Drawing by Adolf Martens (1850-1914): ferrite vein after tempering; surface of crucible steel 0.4 C., structure with ferrite und perlite Drawings by Adolf MartensDrawing by Adolf Martens (1850-1914): ferrite vein after tempering; surface of crucible steel 0.4 C., structure with ferrite und perlite Source: BAM

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