免费无码视频,五月婷婷丁香,亚洲日韩一区二区,亚洲精品黄色,久久日韩精品一区二区三区色欲,成人在线网站,无码国产精品一区二区高潮,亚洲精品一区

65Mn spring steel strip

1．Material:65Mn, 50#, 60Si2Mn, T8-T10A

2．Specification: Thickness: 0.25mm - 2.5mm  Width: 30mm - 260mm

3．Surface: Heat treatment,black, bright(white),blue and yellow.

4．Hardness: HRC40-49(or according to customer’s requests)

5．Application: rolling shutter spring steel strip, hardware tool, mud trowel, shovel,woodworking band saw blade,automatic clutch patch, horology clockwork spring and shoes material.

6．Packaging: standard export packaging(oiled,inner plastic film, outer side Hessian clothes,then on iron/wooden pallets)