Overview: CR8 can ensure high hardness, high wear resistance, toughness and avoid this drawback easy to rattle the difference between steel; appropriate increase in silicon, manganese content can improve the hardenability. The steel has high hardenability, high hardness and wear resistance properties of tool steel with high hardness and high temperature hardness was able to maintain a high red hardness and high wear resistance and toughness appropriate chemical composition of carbon C: 1.30 ~ 1.45 Si Si: ≤0.40 Mn Mn: ≤0.40 sulfur S: ≤0.030 phosphorus P: ≤0.030 chromium Cr: 0.50 ~ 0.70 Ni: to allow the residual content of ≤0.25 copper Cu: to allow the residual content of ≤0.30 Mechanical Properties Hardness: annealing, 241 ~ 187HB, indentation diameter 3.9 ~ 4.4mm; quenching: ≥64HRC following Main: structural steel: Q195, Q215, Q235-A, B, C, D, 05F, 08F, 10F, 15F, 10 # steel, 15 #, 20 #, 25 #, 30 #, 35 #, 40 #, 50 #, 55 #, 60 #, 65 #, 70 #, 75 #, 80 #, 85 #, etc., tool steel: Cr12 CR12MOV 4CR13 3CR17MO 718 , 718H, S136, S136H, 8407, DF-2 H13, P20, etc ... 20Cr, 30Cr, 35Cr, 40Cr, 45Cr, 50Cr, 38CrSi, 12CrMO, 15CRMO, 20CRMO, 30CRMO, 30CRMOA, 35CRMO, 42CRMO, 12CRMOV, 35CRMOV, 12CR1MOV , 25CR2MOVA, 25CR2MO1VA, 38CRMOAL, 40CRV, 50CRVA, 15CRMN, 20CRMN, 40CRMN, 20CRMNSI, 25CRMNSI, 30CRMNSI, 30CRMNSIA, 35CRMN Sweden (Assab) K100, DF-2, XW-10, XW-5, XW-41, 618,618H, 718,718H, S136, S136H, 8402,8407,8416, QRO-90, HSP-41, ASP23, ASP30, ASP60, VANADIS-4, VANADIS-10, HOTVAR, 168S, 635, ASSAB88, ELMAX, XW-42, V-4, S-7, EM2, VANCRON 40, RAMAX2, POLMAX, UNIMAX, NIMAX, MM40, MMXL, ELMXX, DIEVAR, Germany (Sa Site) P20,2311,2738,2316,2083,2767 , 4125,2344,2367, 2379,2842,2363,2436,2510,3343,3207, TSP4,6582,7225,1293,1285, YE2311, YE2738, YE2083, YE2316, YE2344,1.8519,1.8550,1.3243,1.3247,1.2101 , 1.1545,1.2080,1.2312,1.2734,1.2840,1.2842,1.2885,1.2601,1.2606,1.2714,1.1210,1.7147,1.6523,1.6582,1.5919,1.5752 SIA, 20CRMNMO, 40CRMNMO, 20CRMNTI, 30CRMNTI, 20CRNI, 40CRNI, 45CRNI, 50CRNI, 12CRNI2,12CRNI3,20CRNI3,30CrNi3,37CrNi3,12Cr2Ni4,20CR2NI4,20CRNIMO, 40CRNIMOA, 18CRNIMNMOA, 45CRNIMOVA, 18CR2NI4WA, 25CR2NI4WA, 45H, 15CrH, 20CrH, 40CrH, 45CrH, 16CrMnH, 20CrMnH, 1CrMnBH, 17CrMnBH, 40MNBH, 45MNBH, 20MNVBH, 20MNTIBH, 15CRMOH, copper: T1 TU2 TP2 H90 H96 H85 H80 H70 H68 H65 H63 H60 H62 HPb63-3 HPb63-0.1 HPb60-2 HPb59-2 HPb59-1 HPb58-2.5 C3604 CuZn39pb3 CuZn39pb2 C2680 C1020 C1100 other copper. Titanium: TC4 TC3 TC2 TC1 TC6 TC5 TA1 TA2 TA3 TA4 TA5 TA6 TA7 TA8 other titanium. Stainless steel: 410 410S 410L 415 416 410J1 420J2 420F 420 403 431 440A 440B 440C 440F 630 631 632 633 660201 201 202 204 301 301L 301LN 302 302B 303 303Se 304 304L 304H 304N 304LN 304N1 304N2 305 308 309 309S 310 310S 316 316L 316H 316Ti 316Nb 316N 316J1 316J1L 904L 317 317L 317J1 317LN 321 321H 330 347 347 347H XM15J1 329J1 405 430 430F 429 434 444 446 436 439 447J1 403 409L2205 2304 225 2507 and other stainless steel. Cutting steel Y15 Y15PB Y12 Y12PB Y20 Y30 12L13 1213 12L14 1117 1132 Y08, Y12, Y15, Y20, Y30, Y35, Y45, Y08MNS, Y15MN, Y35MN, Y40MN, Y45MN, Y45MNS, Y08PBV, Y12PB, Y15PB, Y45MNSPB, Y08SN, Y15SN, Y45SN, Y45MNSN, Y45CA etc ... spring steel 65Mn 70Mn 60Si2MnA 50CrVA other excellent steel.