Place of Origin : Jiading,China

1)38CrMoAlA(JIS SACM645)2)9Cr18MoV1)38CrMoAlA(JIS SACM645)2)9Cr18MoHeat-treatmentNitriding treatmentSpray bimetallic coatingQuideline of techniqueDepth of nitration layer: 0.05~0.08mmHardness of nitration: 900~1000hvFragility of nitration: less than grand oneRoughness of the surface: Ra0.4Linearity of the screw: 0.015mm/mThe surface hardness of chrom plating after nitrogention:more than 950hvChrome-plating layer thickness:0.025~0.085mm
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