UDDEHOLM ELMAX SUPERCLEAN

1 UDDEHOLM ELMAX SUPERCLEAN3. This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as a warranty of specific properties of the products described or a warranty for fitness for a particular purpose. Classified according to EU Directive 1999/45/EC. For further information see our Material Safety Data Sheets . Edition 4, The latest revised edition of this brochure is the English version, SS-EN ISO 9001. which is always published on our web site SS-EN ISO 14001. UDDEHOLM ELMAX . General Properties UDDEHOLM ELMAX is a high chromium- Physical data vanadium-molybdenum-alloyed steel with the Hardened and tempered to 58 Rockwell C. following characteristics: High wear resistance Temperature (20 C) (200 C) (400 C).

2 68 F 392 F 752 F. High compressive strength Density Corrosion resistant kg/m3 7 600 7 560 7 500. Very good dimensional stability. lbs/in. 0,275 0,273 0,271. High wear resistance is normally connected to Modulus of elasticity N/mm2 230 000 210 000 200 000. low corrosion resistance and vice versa. In psi 33,4 x 106 30,5 x 106 29,0 x 106. UDDEHOLM ELMAX it has however been able to Coefficient of achieve this unique combination of properties thermal expansion per C from 20 C 10,6 x 10-6 11,4 x 10-6. by a powder-metallurgy-based production. per F from 68 F 6,0 x 10-6 6,4 x 10-6. UDDEHOLM ELMAX offers a possibility to make Thermal conductivity*. long-life, lowmaintenance moulds for the best W/m C 15 21. Btu in/ft2 h F 104 146. overall moulding economy.

3 Specific heat J/kg C 460 . Typical C Si Mn Cr Mo V Btu/lb F 0,110 . analysis % 1,7 0,8 0,3 18,0 1,0 3,0. * Thermal conductivity is difficult to measure. The scatter may Delivery be as high as 15%. condition Soft annealed approx. 280 Brinell Colour code Blue/black Compressive strength Applications The figures are to be considered approximate. Hardness 60 RC 55 RC 50 RC. New types of engineering plastics, with high filler contents, place greater demands on the Compressive strength Rm tooling material, in terms of wear resistance N/mm2 3 000 2 700 2 300. and corrosion resistance. UDDEHOLM ELMAX has tsi 195 175 150. psi 435 000 390 000 335 000. been specially developed for high-tech applica- Yield point tions. These include products within the Rp0,2.

4 Electronic industry such as connectors, plugs, N/mm2 2 300 2 150 1 800. tsi 150 140 120. switches, resistors, integrated circuits, etc. psi 335 000 310 000 260 000. UDDEHOLM ELMAX can also be used in the food processing industry, where a combination of corrosion resistance and wear resistance is required for cutting applications. Corrosion resistance Moulds made from UDDEHOLM ELMAX will have good resistance to corrosion when moulding corrosive plastics under normal production conditions. 3. UDDEHOLM ELMAX . Heat treatment Tempering Choose the tempering temperature according Soft annealing to the hardness required by reference to the Protect the steel and heat through to 980 C tempering graph. Temper twice with inter- (1800 F), holding time 2h.

5 Then cool in furnace mediate cooling to room temperature. Lowest 20 C (40 F)/h to 850 C (1560 F). Holding tempering temperature 180 C (360 F). Hold- time 10h. Cool slowly to 750 C (1380 F). ing time at tempering temperature minimum Then freely in air. 2 hours. Stress-relieving TEMPERING GRAPH. After rough machining the tool should be Hardness, HRC Retained austenite %. heated through to 650 C (1200 F), holding 65. time 2 hours. Cool slowly to 500 C (930 F) 1100 C (2010 F) Austenitizing 60 temp. then freely in air. 55. 1050 C. Hardening 50. (1920 F). 45 6. Preheating temperature: 600 850 C (1110 1560 F). Austenitizing temperature: 1050 1100 C (1920 40 4. 2010 F), normally 1080 C(1980 F). 35 Retained austenite 2. 1050 C (1920 F). 30. Temperature Holding* Hardness 200 400 600 800 C.

6 Time before 390 750 1110 1470 F. C F minutes tempering Tempering temperature 2 x 2h 1050 1920 30 60 HRC. 1080 1980 30 61 HRC. 1100 2010 30 61 HRC. * Holding time = time at austenitizing temperature after the tool is fully heated through Protect the part against decarburization and oxidation during hardening. CCT-GRAPH. Austenitizing temperature 1050 C (1920 F). Holding time 30 minutes. F C. 2000 1100. Austenitizing temperature 1050 C. Holding time 30 min. 1800 1000 Ac1 = 960 C. 900 A cs 1600 = 890 C. 800. 1400. Pearlite Cooling Hardness T. Curve 800 500. 700 HV 10 (sec). No. 1200. 600 1 792 1. 1000. 500 2 782 28. 800. 400 3 690 140. Bainite 600 300 M s 4 665 630. 400 200. 5 542 1030. 200 100. 1 2 3 4 5 6 6 360 2095. Mf 1 10 100 1 000 10 000 100 000 Seconds 1 10 100 1 000 Minutes 1 10 100 Hours Air cooling of 10 90 600 bars, mm 4.

7 UDDEHOLM ELMAX . Quenching media Sub-zero treatment Forced air/gas Parts requiring maximum dimensional stability Fluidized bed or salt bath 200 550 C should be sub-zero treated as volume changes (390 1020 F), then cool in air. otherwise may arise. Note: In order to obtain optimum properties, Immediately after quenching the piece the cooling rate should be as fast as is con- should be sub-zero treated to between -40 C. comitant with acceptable distortion. Temper to -120 C (- 40 F to -180 F) followed by immediately the tool reaches 50 70 C (120 tempering. Treatment for 1 3 hours will give a 160 F). hardness increase of 1 3 HRC. Avoid intricate shapes as there is a risk of cracking. Dimensional changes during heat treatment ILLUSTRATION OF THE EFFECT.

8 FROM AUSTENITIZING TEMPERATURE. AND SUBZERO COOLING. The test has been performed on sample size: 40 x 40 x 40 mm (1,6 x 1,6 x 1,6 in.). %. 0,150 1234. 0,125 After 1234. hardening After hardening 0,100 and tempering 123 1234. 0,075 1234 123 1234. 1234. 0,050. 1234 1234 123 A tool for injection moulding of a camera part. Insert 0,025. 1234 123 mould material; UDDEHOLM ELMAX , plastic moulded;. L W T. Polycarbonate (30% GR). L W T. Austenitizing: 1050 C (1920 F) 1050 C (1920 F). 30 min 30 min Quenching medium: air air Sub-zero treatment: -60 C (-75 F). Tempering: 230 C (440 F) 2h + 2h 230 C (440 F) 2h + 2h Mould for tape-cassettes with inserts of UDDEHOLM ELMAX . 5. UDDEHOLM ELMAX . Machining Milling FACE AND SQUARE SHOULDER MILLING. recommendations Milling with carbide The machining recommendations below are to Cutting data parameters Rough milling Fine milling be considered as guiding values which must be Cutting speed (vC).

9 Adapted to existing local conditions. m/min. 80 110 110 140. 265 360 360 460. Feed (fZ). Turning mm/tooth in/tooth 0,2 0,4. 0,008 0,016. 0,1 0,2. 0,004 0,008. Turning with Turning with Depth of cut (ap). carbide high speed mm 2 4 2. Cutting data steel in 0,08 0,16 0,08. parameters Rough turning Fine turning Fine turning Carbide designation Cutting ISO K20, P20 K15, P10. speed (vc) US C2, C6 C2, C7. m/min. 70 120 120 140 10 14 Coated* Coated*. 230 395 395 460 33 46 carbide carbide Feed (f) * Use a wear resistant Al2O3 coated carbide grade mm/r 0,2 0,4 0,05 0,2 0,05 0,2. 0,008 0,016 0,002 0,008 0,002 0,008. Depth END MILLING. of cut (ap). mm 2 4 0,5 2 0,5 3 Type of end mill inch 0,08 0,16 0,02 0,08 0,02 0,12 Carbide Carbide Cutting data Solid indexable High speed designation parameters carbide insert steel ISO K20, P10 P20 K15, P10 Cutting US C2, C7 C6 C2, C7 speed (vC).

10 Coated* Coated* m/min. 50 60 80 110 5 81). carbide carbide 165 195 265 360 16 261). * Use a wear resistant Al2O3 coated carbide grade Feed (fZ). mm/tooth 0,01 0,22)0 0,06 0,22)0 0,01 0,32)0. in/tooth 0,0003 0,0082) 0,002 0,0082) 0,0003 0,0122). Drilling Carbide designation HIGH SPEED STEEL TWIST DRILLS ISO K15, P10 P20 . US C2, C7 C6. Drill diameter Cutting speed (vc) Feed (f) Coated3). mm inch m/min. mm/r carbide 1). 5 3/16 10 12* 33 39* 0,05 0,15 0,002 0,006 For coated HSS end mill vc = 14 16 m/min. (46 52 ). 2). 5 10 3/16 3/8 10 12* 33 39* 0,15 0,20 0,006 0,008 Depending on radial depth of cut and cutter diameter 3). 10 15 3/8 5/8 10 12* 33 39* 0,20 0,25 0,008 0,010 Use a wear resistant Al2O3 coated carbide grade 15 20 5/8 3/4 10 12* 33 39* 0,25 0,35 0,010 0,014.