12595 2 705 12595, JUNGWANGDONG, SHIHUNGSI, KYEONGGIDO, KOREA TEL : 82314326521(Rep.) FAX : 82314975684 http://www.dwsteel.co.kr
Introduction of the company ( ) We were established as an independent incorporation under the name of Shinwha Special Steel Co., Ltd. in 1995. The company has expanded its production line at Sihwa main factory in 1997 and is now producing and supplying Coldrolled Strips for springs, carbon steel strips for machine structural use and carbon tool steel strip by the latest cutting edge automatic line based on our accumulated knowledge and technologies. Our quality management system with ISO9002 certificate has accelerated more reliability on our product s quality, getting a good opportunity to beef up our competitive power internally and exterually owing to the M&A with Dongkuk Ind. in 2004. In addition, we have completed the mass production line system by putting new investment of the production line since 2005 so that we can step forward to expanding the market to home and abroad. we will be your reliable partner with the best service and best quality. company profile ( ) Jan. 1987 Established Shinwha Special Steel Co.,Ltd. (In the export complex of Incheon City) Sept. 1995 New factory constructed in Sihwa Industrial Complex. Dec. 1996 Incheon branch set up. Aug. 1997 Completed the Sihwa factory of Shinwha Special Steel Co.,Ltd. June.1998 Started the export to South East Asia, Europe, Japan and China. June.1999 ISO 9002(KS A9002, EN ISO 9002)certified. July. 2000 Designated as an export promising company. Nov. 2001 5 Million Dollar Export Tower awarded. Jan. 2002 IMS(Information Management System) certificate obtained Dec. 2003 Dongkuk Ind. M&A(paidin capital increase: 10 Billion KRW) Feb. 2004 Daewon Steel co., Ltd. company name changed. Oct. 2004 Representative director changed. (Representative director Lim Soon Myung) Mar. 2005 20HiCold Rolling Reversing mill Completed. July. 2006 Nominated as a frontier company for internet trade in Gyeonggi. Nov. 2006 Factory office and factory building expanded. Manufacturing Facilities ( ) Raw material slitter ( ) Annealing facility Cold rolling mill Product slitter Inspection Facilities ( ) Optical emission spectrometer ( ) Universal testing machine ( ) Micro vickers hardness tester () Rockwell hardness tester () Micro scope Contents ( ) 4 Manufacturing process 6 Applications 8 Manufacturing facilities 10 Raw Material slitter 11 Hydrogen annealing furnace 12 20Hicold Rolling reversing mill 13 6Hicold Rolling reversing mill 14 4Hicold Rolling reversing mill 15 Product slitter 16 Packing 17 Available dimension 18 Tolerances 19 Finishing and hardness 20 Steel grades and chemical composition 22 Comparative hardness table 2 3
Manufacturing Process 20 HiCold Rolling Reversing Mill Annealing Line Skin Pass Line Slitting Line Hot Rolled Steel Coil Cold Rolled Steel Coil 6 HiCold Rolling Reversing Mill Slitting Line Packing Line 4 HiCold Rolling Reversing Mill Annealing Line Skin Pass Line 20 HiCold Rolling Reversing mill 6 HiCold Rolling Reversing mill 4 HiCold Rolling Reversing mill Annealing Line Slitting Line Slitting Line 4 5
Applications Springs SUP 10M Razor Blade Cutlery () SK2M SK2MCR4 Hack saws () Cutlery () Springs SK3M Measuring tape () Razor Blade Pen points () Windup springs () Springs Cutlery () Knitting needles ( ) SK4M Measuring tape () Gauges () Springs Cutlery () Knitting needles ( ) Gauges Cluch parts Band saws for woodworking and lumbering ( ) Round saws Officeequipment parts ( ) SK5M SK5M MO Washers() Clutch parts ( ) Cutlery () Springs SK6M Retainers S30CM Officeequipment parts ( ) Friction plates S35CM Cluch parts Chain parts Retainers Washers () S45CM Measuring tape () Structureal parts for cameras Chain parts Springs Cluch parts Chain parts Washers () Safety buckles () S50CM Springs Safety shoes Can openers Thompson blades Structureal parts for cameras S55CM Chain parts Hand saws for woodworking Safety shoes Springs Officeequipment parts ( ) Washers () S60CM Safety shoes Cluch parts Springs Washers () S65CM Washers () Hand saws for woodworking Officeequipment parts ( ) Springs S70CM Cluch parts Washers () Springs S75CM Carbon tool steels Spring steels Carbon steels CrMo steels Alloy tool steels Cold rolled steels SCM 415M Chain Parts Thompson blades SCM 435M Chain Parts Officeequipment parts ( ) SPCC Machinery Parts SPCD SPCE Machinery Parts Machinery Parts SKS 5M Cutlery Round saws Band saws for woodworking and lumbering SKS 51M Cutlery Round saws Band saws for woodworking and lumbering 6 7
Manufacturing Facilities Raw materials slitter 20 Hicold rolling reversing mill ( ) Hydrogen annealing furnace 6 Hicold rolling reversing mill ( ) Products slitter ( ) Packing () 8 9
Raw Materials Slitter Hydrogen Annealing Furnace Raw material slitter Capacity : 5,000Ton/Month Available Thickness : 0.5~5.4mm Available Width : 100~1,300mm Unit Weight : 20Ton/coil Hydrogen annealing furnace Capacity : 70,000Ton/Year Available Thickness : 0.1~5.4mm Unit Weight : 25Ton/base Out Diameter : max. 1,550mm 10 11
20Hicold Rolling Reversing Mill 6Hicold Rolling Reversing Mill 20Hicold rolling reversing mill Capacity : 5,000Ton/Month Available Thickness : 0.1~3.5mm Available Width : 350~630mm 6Hicold rolling reversing mill Capacity : 5,000Ton/Month Available Thickness : 0.1~5.4mm Available Width : 150~420mm 12 13
4Hicold Rolling Reversing Mill Products Slitter 4Hicold rolling reversing mill Capacity : 1,500Ton/Month Available Thickness : 0.1~2.3mm Available Width : 100~320mm Products slitter Capacity : 4,000Ton/Month Maximum coil weight : 5ton Strip thickness : 0.1mm~4.5mm Strip width : 6mm~630mm 14 15
Packing Available Dimension Thickness (mm) 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.3 0.2 0.1 0.0 6 10 20 30 40 50 100 200 300 400 600 Width(mm) Available Dimension Type Available Dimension () Thickness (mm) 0.1 ~ 4.5 Width (mm) 6 ~ 600 Inner Diameter (mm) 320, 408, 508 Out Diameter (mm) 650 ~ 1,500 16 17
Tolerances Finishing and Hardness Thickness tolerance ( ) (Unit : mm) Finishing Width Thickness tolerance ( ) Thickness Width( )<160 160 Width( )<250 250 Width( )<400 0.10 T <0.15 ± 0.012 ± 0.015 ± 0.015 0.15 T <0.25 ± 0.015 ± 0.020 ± 0.025 0.25 T <0.40 ± 0.020 ± 0.025 ± 0.030 0.40 T <0.60 ± 0.025 ± 0.030 ± 0.035 0.60 T <0.90 ± 0.030 ± 0.035 ± 0.040 0.90 T <1.20 ± 0.035 ± 0.040 ± 0.045 1.20 T <1.60 ± 0.040 ± 0.045 ± 0.050 1.60 T <2.10 ± 0.045 ± 0.050 ± 0.060 2.10 T <3.00 ± 0.050 ± 0.060 ± 0.070 3.00 T <4.00 ± 0.060 ± 0.070 ± 0.080 4.00 T <4.50 ± 0.080 ± 0.090 ± 0.100 Symbol Condition Classification() Annealed Annealed after cold rolling A Skinpassed Annealed and skinpass after cold rolling S Cold rolled as cold rolled R Hardness ( ) Classification Steel grade Skinpassed Cold rolled S 30 CM Hv Max. 150 Hv 150~240 Width tolerance ( ) (Unit : mm) Thickness( ) Width tolerance ( ) Width( ) <160 160 Width( ) <250 250 Width( ) <400 0.10 T <0.25 ± 0.10 ± 0.20 ±0.25 0.25 T <0.60 ± 0.15 ± 0.20 ±0.25 0.60 T <1.20 ± 0.20 ± 0.30 ±0.30 1.20 T <4.50 ± 0.25 ± 0.40 ±0.40 S 35 CM Hv Max. 150 Hv 150~240 S 45 CM Hv Max. 160 Hv 160~240 Carbon steel S 50 CM Hv Max. 170 Hv 170~260 S 55 CM Hv Max. 170 Hv 170~260 S 60 CM Hv Max. 180 Hv 170~280 S 65 CM Hv Max. 180 Hv 170~280 S 70 CM Hv Max. 190 Hv 170~280 S 75 CM Hv Max. 190 Hv 170~280 SK 2 M Hv Max. 220 Hv 220~300 Carbon tool steel SK 3 M Hv Max. 220 Hv 220~300 Camber (Unit : mm) SK 4 M Hv Max. 210 Hv 210~280 SK 5 M Hv Max. 200 Hv 200~280 Width( ) Camber Standard length 2,000 Remark SK 6 M Hv Max. 190 Hv 190~260 Alloy tool steel SKS 5M Hv Max. 200 Hv 200~280 6 W <30 12 SKS 51M Hv Max. 210 Hv 210~280 30 W <50 8 50 W <80 6 CrMo Steel SCM 415M Hv Max. 160 Hv 160~230 SCM 435M Hv Max. 180 Hv 180~260 80 W <400 4 Spring steel SUP 10M Hv Max. 200 Hv 200~260 18 19
Steel Grades and Chemical Composition Symbol Steel grade KS GB JIS DIN BS SAE/AISI Chemical Composition C Si Mn P S Cu Ni Cr Ni+Cr Mo W V S 30 CM 30 S 30 CM 1030 0.270.33 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX S 35 CM 35 S 35 CM 1035 0.320.38 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX S 45CM 45 S 45CM Ck45 1045 0.420.48 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX Carbon steel S 50 CM S 55 CM 50 55 S 50 CM S 55 CM Ck55 1050 1055 0.470.53 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX 0.520.58 0.150.35 0.600.90 0.030MAX 0.030MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX S 60 CM 60 S 60 CM Ck60 CS 60 1060 0.550.65 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX S 65 CM 65 S 65 CM 0.600.70 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX S 70 CM S 70 CM Ck75 CS 70 1070 0.650.75 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX S 75 CM S 75 CM CS80 1074 0.700.80 0.150.35 0.600.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX SK 2M Cr 4 SK 2M Cr 4 1.101.30 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.40.5 SK 2 M T12 SK 2 M C125W2 BW1C 1.101.30 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.30MAX Carbon tool steel SK 3 M SK 4 M T10 SK 3 M SK 4 M C105W2 BW1B 1095 1086 1.001.10 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.30MAX 0.901.00 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.30MAX SK 5 M Mo T8 SK 5 M 0.800.90 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.30MAX 0.10.3 SK 5 M SK 6 M C105W2 BW1B 0.800.90 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.30MAX Alloy tool steel SKS 5M SKS 51M SKS 5M SKS 51M 0.750.85 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.701.30 0.200.50 0.750.85 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 1.302.00 0.200.50 SCM 415M 15CrMo SCM 415M 15CrMo 1501620 0.130.18 0.150.35 0.600.85 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.901.20 0.150.30 CrMo steel SCM430M SCM 435M 35CrMo SCM 430M SCM 435M 35CrMo4 708A30 708A37 4130 4135 0.280.33 0.150.35 0.600.85 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.901.20 0.150.30 0.330.38 0.150.35 0.650.95 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.901.20 0.150.30 SCM 440M SCM 440M 42CrMo4 4140 4142 0.380.43 0.150.35 0.650.95 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.901.20 0.150.30 Spring steel SUP 10M 50CrVA SUP 10M 50CrVA En47 6150 0.470.55 0.150.35 0.650.95 0.035MAX 0.035MAX 0.30MAX 0.801.10 0.150.25 SPCC SPCC 0.12MAX 0.50MAX 0.040MAX 0.045MAX Cold rolled steel SPCD SPCD 0.10MAX 0.45MAX 0.035MAX 0.030MAX SPCE SPCE 0.08MAX 0.40MAX 0.030MAX 0.030MAX 20 21
Comparative Hardness Table Vickers Brinnel Rockewell(HR) Rockwell Supertical Shore T/S Vickers (Hv) (Hb) HrA HrB HrC HrD 15N 30N 45N (HS) N/mm 2 kgf/mm 2 (Hv) 670 80.6 58.8 69.8 89.7 76.4 65.3 670 660 80.3 58.3 69.4 89.5 75.9 64.7 79 660 650 80 57.8 69 89.2 75.5 64.1 650 640 79.8 57.3 68.7 89 75.1 63.5 77 640 630 79.5 56.8 68.3 88.8 74.6 63 630 620 79.2 56.3 67.9 88.5 74.2 62.4 75 620 610 78.9 55.7 67.5 88.2 73.6 61.7 610 600 78.6 55.2 67 88 73.2 61.2 74 600 590 78.4 54.7 66.7 87.8 72.7 60.5 2095 210 590 580 78 54.1 66.2 87.5 72.1 59.9 72 2020 206 580 570 77.8 53.6 65.8 87.2 71.7 59.3 1981 202 570 560 77.4 53 65.4 86.9 71.2 58.6 71 1952 199 560 550 505 77 52.3 64.8 86.6 70.5 57.8 1912 195 550 540 496 76.7 51.7 64.4 86.3 70 57 69 1863 190 540 530 488 76.4 51.1 63.9 86 69.5 56.2 1824 186 530 520 480 76.1 50.5 63.5 85.7 69 55.6 67 1795 183 520 510 473 75.7 49.8 62.9 85.4 68.3 54.7 1755 179 510 500 465 75.3 49.1 62.2 85 67.7 53.9 66 1706 174 500 490 456 74.9 48.4 61.6 84.7 67.1 53.1 1957 169 490 480 448 74.5 47.7 61.3 83.3 66.4 52.2 64 1618 165 480 470 441 74.1 46.9 60.7 83.9 65.7 51.3 1569 160 470 460 433 73.6 46.1 60.1 83.6 64.9 50.4 62 1530 156 460 450 425 73.3 45.3 59.4 83.2 64.3 49.4 1500 153 450 440 415 72.8 44.5 58.8 82.8 63.5 48.4 59 1461 149 440 430 405 72.3 43.6 58.2 82.3 62.7 47.4 1412 144 430 420 397 71.8 42.7 57.7 81.8 61.9 46.4 57 1373 140 420 410 288 71.4 41.8 56.8 81.4 31.1 45.3 1334 136 410 400 379 70.8 40.8 56 81 60.2 44.1 55 1285 131 400 390 369 70.3 39.8 55.2 80.3 59.3 42.9 1245 127 390 380 360 69.8 (110.0) 38.8 54.4 79.8 58.4 41.7 52 1206 123 380 370 350 69.2 37.7 53.6 79.2 57.4 40.4 1177 120 370 360 341 68.7 (109.0) 36.6 52.8 78.6 56.4 39.1 50 1128 115 360 Vickers Brinnel Rockewell(HR) Rockwell Supertical Shore T/S Vickers (Hv) (Hb) HrA HrB HrC HrD 15N 30N 45N (HS) N/mm 2 kgf/mm 2 (Hv) 340 322 67.6 (108.0) 34.4 51.1 77.4 54.4 36.5 47 1069 109 340 330 313 67 33.3 50.2 76.8 53.6 35.2 1030 105 330 320 303 66.4 (107.0) 32.2 49.4 76.2 52.3 33.9 45 1010 103 320 310 294 65.8 31 48.4 75.6 51.3 32.5 981 100 310 300 284 65.2 (105.5) 29.8 47.5 74.9 50.2 31.1 42 951 97 300 295 280 64.8 29.2 47.1 74.6 49.7 30.4 941 96 295 290 275 64.5 (104.5) 28.5 46.5 74.2 49 29.5 41 922 94 290 285 270 64.2 27.8 46 73.8 48.4 28.7 902 92 285 280 265 63.8 (103.5) 27.1 45.3 73.4 47.8 27.9 40 892 91 280 275 261 63.5 26.4 44.9 73 47.2 27.1 873 89 275 270 256 63.1 (102.0) 25.6 44.4 72.6 46.4 26.2 38 853 87 270 265 252 62.7 24.8 43.7 72.1 45.7 25.2 843 86 265 260 247 62.4 (101.0) 24 43.1 71.6 45 24.3 37 824 84 260 255 243 62 23.1 42.2 71.1 44.2 23.2 804 82 255 250 238 61.6 99.5 22.2 41.7 70.6 43.4 22.2 36 794 81 250 245 233 61.2 21.3 41.1 70.1 42.5 21.2 775 79 245 240 228 60.7 98.1 20.3 40.3 69.6 41.7 19.9 34 765 78 240 230 219 96.7 (18.0) 33 736 75 230 220 209 95 (15.7) 32 696 71 220 210 200 93.4 (13.4) 30 667 68 210 200 190 91.5 (11.0) 29 637 65 200 190 181 89.5 (8.5) 28 608 62 190 180 171 87.1 (6.3) 26 579 59 180 170 162 85 (3.0) 25 549 56 170 160 152 81.7 (0.0) 24 520 53 160 150 143 78.7 22 490 50 150 140 133 75 21 451 46 140 130 124 71.2 20 431 44 130 120 114 66.7 392 40 120 110 105 62.3 110 100 95 56.2 100 95 90 52 95 350 331 68.1 35.5 51.9 78 55.4 37.8 1098 112 350 22 23