Name： Rolls And Rings Grade： LH20, LH30, LH40, LH45, LH50, LR20, LR30, L Usage： Roll ring for high-speed wire cutting, processing steel. Generally used steel mills.
Grades for Carbide Rollers and Rings    Grade & Spec 更多详细信息请点击：www.lizhou-cn.com  www.lzcarbide.com 查看！~谢谢 Grade Physical and mechanical properties Recommended application Density Hardness T.R.S g/cm3  HRA n/mm2 LH20 14.30 ≥86.0 ≥2300 High rear resistance and corrosion resistance. Used in the last 1-2 stands of finishing mills. LH30 13.90 ≥84.0 ≥2400 They are used for most of the rear stands or all stands in finishing bar rolling bar rolling machines. LH40 13.50 ≥83.5 ≥2500 Best for general purposes. Used in the front stands of good mills and in the rear stands of common mills. LH45 13.40 ≥83.0 ≥2400 Used for the first and second stands of finishing mills and in the stands of pre-finishing roll mills. For every of rolling lines for low speed rolling , low precision and unstable operation. LH50 13.00 ≥81.0 ≥2000 Maximum binder content, excellent toughness and thermal crack resistance. Usually used in the stands of pre-finishing rolling mills and for roll rings for hot rolling of ribbed steel. LR20 14.30 ≥86.0 ≥2200 High rear resistance and corrosion resistance. Used in the last 1-2 stands of finishing mills. LR30 13.9 ≥83.0 ≥2300 With good toughness, wear-resistant, corrosion resistance and thermal crack resistance, used in the middle and rear stands of finishing mills. LR40 13.60 ≥82.0 2300 Good toughness and thermal crack resistance, good for general purposes. Used in most stands of the finishing mills and in the rear stands of common mills LR45 13.50 ≥81.0 ≥2350 With the good toughness and thermal crack resistance, usually used in the front stands of finishing mills. LR55 13.20 ≥80.0 ≥2200 Good impact resistance. Used in the stands of pre-finishing rolling mills for hot rolling ribbed steel bars and they can be machined with turning and milling. LR60 12.80 ≥78.0 ≥2100 Good impact resistance. used for hot rolling ribbed steel bars and in the first and second stands of pre-finishing rolling mills.