Technical Index: Depth of Nitrated Layer:0.5~0.8mm Hardness of nitration: 950~1100Hv Fragility of nitration: Less than grade 1 Surface Hardness of Nitrated Cr coating layer: 950Hv Hardness of Bimetallic Layer: HRC55~72 Thickness of Cr-coating Layer: 0.03~0.08mm Depth of Bimetallic Layer:>2mm Material :quality alloy steels 1.38CRMOALA 2.SKD61 3.stainless steel 4. Bimetallic Supply Capacity: Production Capacity: 1500 sets/month Packing: Fumigation wooden case Delivery Date: 30~40 days The product specification Screw: 15 mm in diameter-250 mm diameter screw Screw length: 300 mm to 8000 mm screw length Machine tube diameter 40 mm to 400 mm: barrel outer diameter Length-diameter ratio: L/D: 10-46 |