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Vanadis 4 Extra Vanadis 4 Extra Vanadis 4 Extra UDDEHOLM VANADIS 4 EXTRA VANADIS 4 EXTRA VANADIS 4 EXTRA REFERENCE STANDARD AISI DIN JIS DF-2 ARNE O1 1.2510 SKS 3 DF-3 O1 1.2510 SKS 3 XW-5 SVERKER 3 D6 (D3) (1.2436) (SKD 2) XW-10 RIGOR A2 1.2363 SKD 12 XW-41 SVERKER 21 D2 1.2379 SKD 11 XW-42 D2 1.2379 SKD 11 CARMO CARMO CALMAX CALMAX CALDIE CALDIE ASSAB 88 SLEIPNER ASP 23 VANADIS 23 (M3:2) 1.3344 SKH 53 ASP 30 VANADIS 30 M3:2 + Co 1.3244 SKH 40 ASP 60 VANADIS 60 1.3241 VANADIS 4 EXTRA VANADIS 4 EXTRA VANADIS 6 VANADIS 6 VANADIS 10 VANADIS 10 VACRON 40 VANCRON 40 618 P20 Mod. 1.2738 618 HH P20 Mod. 1.2738 618 T P20 Mod. 1.2738 Mod. 718 SUPREME IMPAX SUPREME P20 Mod. 1.2738 718 HH IMPAX HH P20 Mod. 1.2738 NIMAX NIMAX UNIMAX UNIMAX CORRAX CORRAX STAVAX ESR STAVAX ESR 420 Mod. 1.2083 ESR SUS 420J2 MIRRAX ESR MIRRAX ESR 420 Mod. POLMAX POLMAX ELMAX ELMAX RAMAX LH RAMAX LH 420 F Mod. RAMAX HH RAMAX HH 420 F Mod. ROYALLOY PRODAX PT18 MOLDMAX SC MMXL MOLDMAX XL MM40 MOLDMAX HH ALVAR 14 ALVAR 14 1.2714 SKT 4 8407 2M ORVAR 2M H13 1.2344 SKD 61 8407 SUPREME ORVAR SUPREME H13 Premium 1.2344 ESR SKD 61 DIEVAR DIEVAR HOTVAR HOTVAR QRO 90 SUPREME QRO 90 SUPREME 705 4340 1.6582 SNCM8 709 4140 1.7225 SCM4 760 1050 1.1730 S50C 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. Edition 080929 2 VANADIS 4 EXTRA VANADIS 4 EXTRA CONSISTENT TOOL PERFORMANCE WITH LONG AND RELIABLE TOOL LIFE With an increased demand for just-in-time (JIT) deliveries and shorter lead time, it is of utmost importance that the tool life is predictable and with a long and reliable performance. Good performance is also necessary in order to reduce your down time and cost for tool maintenance, as well as to optimise machine utilisation. Such reduction and optimisation lead to an optimal tooling economy and a competitive production cost. Vanadis 4 Extra offers an extremely good combination of ductility and wear resistance (abrasive, adhesive and mixed) for high performance tools. This makes it possible for consistent tool performance for demanding cold work applications such as blanking and forming of austenitic stainless steels and advanced high strength steels (AHSS). In such demanding applications, a combination of wear resistance is needed in combination with resistance to chipping and cracking for long production runs, with less tooling maintenance. MACHINABILITY The tool making process is a very important link in the tooling sequence. In order to achieve a long and reliable tool performance, the quality of the tool in terms of surface finish is extremely important. Vanadis 4 Extra offers a very good machinability and grindability compared with other highly alloyed powder metallurgical tool steels, resulting in better surface finish and an excellent tool quality. This is due to the well balanced chemistry of Vanadis 4 Extra and the SuperClean process that is utilised for its production. 3 VANADIS 4 EXTRA Critical tool steel properties General FOR GOOD TOOL PERFORMANCE Vanadis 4 Extra is a chromium-molybdenum-vanadium alloyed steel which is characterised by: Correct hardness for the application High wear resistance Very good ductility High ductility High abrasive-adhesive wear resistance High compressive strength High wear resistance is often associated with low ductility Good dimensional stability during heat treatment and and vice-versa. However, in many cases for optimal tool in service performance, both high wear resistance and ductility are essential. Very good through-hardening properties Good temper back resistance Vanadis 4 Extra is a powder metallurgical cold work tool Good machinability and grindability steel offering an extremely good combination of wear resistance and ductility for high performance tools. C Si Mn Cr Mo V Typical analysis % 1.4 0.4 0.4 4.7 3.5 3.7 FOR TOOLMAKING Standard spec. None Machinability Heat treatment Delivery condition Soft annealed to approx. 230 HB Dimensional stability during heat treatment Colour code Green / White with black line across Toolmaking with highly alloyed tool steels has traditionally created problems with machining and heat treatment when compared with lower alloyed grades, this then often leads to increased toolmaking costs. Applications Due to our carefully balanced alloying and the powder Vanadis 4 Extra is especially suitable for applications metallurgical manufacturing process, Vanadis 4 Extra has where adhesive wear and/or chipping are the dominant better machinability than the tool steel grade AISI D2. failure mechanisms. For examples: One major advantage with Vanadis 4 Extra is that the with soft/adherent work materials such as austenitic dimensional stability after hardening and tempering is stainless steel, mild steel, copper and aluminium much better than for all known high performance cold with thicker work materials work tool steels. This means that Vanadis 4 Extra is a high strength work materials tool steel which is very suitable for CVD coating. Vanadis 4 Extra is also very suitable for blanking and forming of Ultra High Strength Steel Sheets. These materials place high demands on the tool steel regarding abrasive wear resistance and ductility. Roof bow Roof rail C-pillar A-pillar Front side member B-pillar Cross member Door beams Bumper reinforcement Vanadis 4 Extra is very suitable for blanking and forming Ultra High Strength Steel Sheets into automotive structural parts. 4 VANADIS 4 EXTRA TypicaL appLicatiOns Blanking and forming Fine blanking Cold extrusion tooling Powder pressing Deep drawing Knives Substrate steel for surface coating Properties PHysicaL DATA SKD11 / AISI D2 / WNr. 1.2379 (57 HRC) Hardened and tempered to 60 HRC. Temperature 20°C 200°C 400°C Density 7 700 - - kg/m3 Modulus of elasticity 206 000 200 000 185 000 MPa Coefficient of thermal expansion - 10.9 x 10-6 11.7 x 10-6 per °C from 20°C Thermal conductivity - 30 30 W/m °C ASSAB 88 (61 HRC) Specific heat 460 - - J/kg °C IMpact strengtH Approximate room temperature unotched impact strength as a function of hardness is shown below. Original bar dimension: Ø 105 mm, samples are taken from the centre and tested in the transverse direction. Specimen size: 7 x 10 x 55 mm unnotched Hardened between 940°C and 1150°C. Holding time 30 minutes up to 1100°C, over 1100°C 15 minutes. Quenched in air. Tempered 2 x 2h between 525°C and 570°C. VANADIS 4 (59 HRC) Unotched impact strength (ductility) The difference in ductility between Vanadis 4 Extra and AISI D2 at different hardness levels. Unnotched impact energy, J 100 9 0 80 VANADIS 4 EXTRA 70 60 50 40 30 20 10 AISI D2 • 54 55 56 57 58 59 60 61 62 63 64 65 66 VANADIS 4 EXTRA (62 HRC) Hardness, HRC Punches used for blanking 1.8 mm thick high strength steels (1200 MPa), after 50,000 press strokes. 5 HARDNESS AND RETAINED AUSTENITE AS A FUNCTION OF AUSTENITIZING TEMPERATURE Hardness, HRC Retained austenite, % 68 50 66 Hardness 40 64 30 62 60 20 Retained austenite 58 10 56 54 980 1000 1020 1040 1060 1080 1100 1120 1140°C Austenitising temperature VANADIS 4 EXTRA Heat treatment SOFT ANNEALING TEMPERING Protect the steel and heat through to 900°C. Cool in The tempering temperature can be selected according the furnace at 10°C per hour to 750°C, then freely in air. to the hardness required by reference to the tempering graphs below. STRESS RELIEVING Temper at least twice with intermediate cooling to After rough machining, the tool should be heated through room temperature. The lowest tempering temperature to 650°C, holding time 2 hours. Cool slowly to 500°C, which should be used is 525°C. The minimum holding then freely in air. time at temperature is 2 hours. In order not to reduce the toughness, do not temper HARDENING below 525°C. Preheating temperature: 600–700°C. To avoid a high content of retained austenite, choose a Austenitising temperature: 940–1150°C. Normally tempering temperature over 525°C. 1020°C. For large sections >70 mm, use 1060°C. Holding time: 30 min. up to 1100°C, 15 min. above 1100°C. Holding time = time at hardening temperature after the tool is fully heated through. A holding time that is less Tempering graphs TEMPERING GRAPH than the recommendation mentioned above, will result TEMPERING GRAPH in loss of hardness. Hardness, HRC Retained austenite, % Ha66rdness, HRC Retained austenite, % 66 Protect the part against decarburisation and oxidation during 64 64 1020°C hardening. 62 1020°C 62 Unnotched impact energy, J 60 100 35 QUENCHING MEDIA 60 35 9 0 58 980°C 58 980°C 30 80 Vacuum (high speedVANADIS gas at sufficient4 EXTRA overpressure) 56 30 70 56 25 Martempering bath or fluidised bed at 500–550°C 54 940°C 25 60 54 940°C 20 50 Martempering bath or fluidised bed at 200–350°C 52 20 52 15 40 50 15 Note30 1: Temper the tool as soon as its temperature 50 Retained austenite 10 48 Retain102ed 0°Caustenite 10 reaches20 50–70°C. 48 46 1020°C 5 10 AISI D2 Note 2: In order to obtain the• optimum properties for 46 5 the 54 tool, 55 the 56 cooling 57 58 rate 59 should 60 be61 as 62 fast 63as possible 64 65 66 400 450 500 550 600°C while maintaining an acceptableHardness, H levelRC of distortion.
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