**Product Name: The Conical twin screw barrel
***Material for twin screw barrel for PVC pipe
1)38CrMoALA(JIS SACM645)
2)42CrMo(JIS SCM440)
3)9Cr18MOV
4)CW6Mo5Cr4V2
5)Various high quality alloy steels, According to different usage, the choose for alloy is different, Some require for abrasion-resistant while some require for corrosion-resistant. For standard, we Have Fe-based, Ni-based, w2c alloy, Tunsten alloy etc for choice.

6)The foreign material we used as following:
*Germanysteel GH113, 2250, 2842, 1.8509, 1.442, 1.6582, 1.6523, 1.2080, 1.4542,
*USA Steel, P20, 420, L6, H13, W110, D3, A2, D6, O1, S1, M35, 8620, 3115, K52440
*Sweden steel, 718S, 718H, S136, S136H, STAVAX, ASP-23, ASP-30
*Australia Steel, M201, M300, W302, K460, W300, K900, K100, W321
*Hardness steel, YG6X, YG 6A, YG6, YG8N, YG8, YG8C, YG11C, YG15, YT5, YT14, YT30
*Japan Steel, SKT4, YXM4, YXM42, SNC815, SK-3, SKS3, and etc.