Product name:Roller Shutter Spring Heat Treatment 65Mn Carbon Steel Strip Thickness:0.27-2.5mm Width:30-300mm Usage:Making Tools Hardness:43--45 Coil ID:300mm Weight:100kg/coil Technique:Hot Rolled Surface Treatment:Polished Steel Grade:50# or 65Mn Thickness:1.2-2.0mm Standard:AiSi Certificate:API Certificate:ce Certificate:JIS Certificate:ISO9001 Tolerance:1% Processing Service:Welding Processing Service:Punching Processing Service:Cutting Processing Service:Bending Processing Service:Decoiling Delivery Time:15-21 days Place of Origin:CN;SHN Application:Making Tools Width:30--300mm Grade:50# 65Mn