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Assab Xw-42 Uddeholm Sverker 21 Reference Standard

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Assab Xw-42 Uddeholm Sverker 21 Reference Standard ASSAB XW-42 UDDEHOLM SVERKER 21 REFERENCE STANDARD AISI WNr. JIS ASSAB DF-3 ARNE O1 1.2510 SKS 3 ASSAB XW-5 SVERKER 3 D6 (D3) (1.2436) (SKD 2) ASSAB XW-10 RIGOR A2 1.2363 SKD 12 ASSAB XW-42 SVERKER 21 D2 1.2379 (SKD 11) CALMAX / CARMO CALMAX /CARMO 1.2358 VIKING VIKING / CHIPPER (1.2631) CALDIE CALDIE ASSAB 88 SLEIPNER ASSAB PM 23 SUPERCLEAN VANADIS 23 SUPERCLEAN (M3:2) 1.3395 (SKH 53) ASSAB PM 30 SUPERCLEAN VANADIS 30 SUPERCLEAN (M3:2 + Co) 1.3294 SKH 40 ASSAB PM 60 SUPERCLEAN VANADIS 60 SUPERCLEAN (1.3292) VANADIS 4 EXTRA SUPERCLEAN VANADIS 4 EXTRA SUPERCLEAN VANADIS 8 SUPERCLEAN VANADIS 8 SUPERCLEAN VANCRON SUPERCLEAN VANCRON SUPERCLEAN ELMAX SUPERCLEAN ELMAX SUPERCLEAN ASSAB 518 P20 1.2311 ASSAB 618 T (P20) (1.2738) ASSAB 618 / 618 HH (P20) 1.2738 ASSAB 718 SUPREME / HH IMPAX SUPREME / HH (P20) 1.2738 NIMAX NIMAX NIMAX ESR NIMAX ESR VIDAR 1 ESR VIDAR 1 ESR H11 1.2343 SKD 6 UNIMAX UNIMAX CORRAX CORRAX ASSAB 2083 420 1.2083 SUS 420J2 STAVAX ESR STAVAX ESR (420) (1.2083) (SUS 420J2) MIRRAX ESR MIRRAX ESR (420) MIRRAX 40 MIRRAX 40 (420) POLMAX POLMAX (420) (1.2083) (SUS 420J2) RAMAX HH RAMAX HH (420 F) ROYALLOY ROYALLOY (420 F) COOLMOULD COOLMOULD ASSAB 2714 1.2714 SKT 4 ASSAB 2344 H13 1.2344 SKD 61 ASSAB 8407 2M ORVAR 2M H13 1.2344 SKD 61 ASSAB 8407 SUPREME ORVAR SUPREME H13 Premium 1.2344 SKD 61 DIEVAR DIEVAR QRO 90 SUPREME QRO 90 SUPREME 20180718 FORMVAR FORMVAR ( ) - modified grade “ASSAB” and the logo are registered trademarks. The information contained herein is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should therefore not be construed as a warranty of specific properties of the products described or a warranty for fitness for a particular purpose. Each user of ASSAB products is responsible for making its own determination as to the suitability of ASSAB products and services. Edition 20191113 2 | ASSAB XW-42 GENERAL FORMING AND OTHER APPLICATIONS Hardness ASSAB XW-42 is a high-carbon, high-chromium Application tool steel alloyed with molybdenum and vanadium HRC characterised by: Tools for: Blending, raising, deep-drawing, rim-rolling, 56 - 62 z High wear resistance spinning and flow-turning z High compressive strength Coining dies 56 - 60 z High hardness after hardening Cold extrusion dies, 58 - 60 punches 56 - 60 z Good through-hardening properties Tube forming rolls, section forming rolls, 58 - 62 z Good dimension stability during heat treatment plain rolls z Good resistance to tempering back Dies for moulding of: Ceramics, bricks, tiles, grinding wheels, tablets, 58 - 62 abrasive plastics C Si Mn Cr Mo V Typical analysis % 1.55 0.3 0.3 11.6 0.8 0.8 Thread rolling dies 58 - 62 Cold heading tools 56 - 60 Standard AISI D2, WNr. 1.2379, SKD 11 specification Crushing hammers 56 -60 Swaging tools 56 - 60 Delivery condition Soft annealed to approx. 240 HB Gauges, measuring tools, guide rails, bushes, 58 - 62 Colour code Yellow / White sleeves, knurling tools, sandblast nozzles APPLICATIONS PROPERTIES ASSAB XW-42 is recommended for tools requiring very high wear resistance, combined with moderate PHYSICAL DATA toughness (shock resistance). ASSAB XW-42 is a Hardened and tempered to 62 HRC. versatile tool steel, which can be used for a wide variety of cold work applications including blanking Temperature 20 °C 200 °C 400 °C and other cutting processes, and several forming Density 7 700 7 650 7 600 processes. kg/m3 ASSAB XW-42 can be supplied in various surface Modulus of elasticity 210 000 200 000 - executions including hot rolled, pre-machined, and MPa fine machined condition. It is also available in the Coefficient of thermal form of hollow bars. expansion - 11.7 x 10-6 12.8 x 10-6 per °C from 20 °C BLANKING AND CUTTING Thermal conductivity 20 21 - W/m °C Work material Material Specific heat hardness (HB) 460 - - Application thickness, J/kg °C mm ≤180 >180 HRC HRC COMPRESSIVE STRENGTH Tools for: < 3 mm 60 - 62 58 - 60 Blanking, punching, piercing, 3 - 6 mm 58 - 60 54 - 56 Approximate compressive strength versus hardness cropping, shearing, trimming, at room temperature. clipping 6 - 10 mm 54 - 56 - Hardness Strength MPa Short cold sheears HRC Shredding knives for plastic waste 56 - 60 Rmc Rc0.2 Granulator knives 56 2 070 1 510 58 2 200 1 620 Circular shears 58 - 60 60 2 950 2 150 Clipping, timming tools for forgings Hot 58 - 60 62 3 100 2 200 Cold 56 - 58 * Rmc Compressive strength Wood milling cutters, reamers, broachers 58 - 60 Rc0.2 Compressive yield strength ASSAB XW-42 | 3 HEAT TREATMENT SUB-ZERO TREATMENT SOFT ANNEALING Pieces requiring maximum dimensional stability should be sub-zero treated, as volume changes Protect the steel and heat through to 850 °C. Then may occur in the course of time. This applies, for cool in the furnace at 10 °C per hour to 650 °C, example, to measuring tools like gauges and certain then freely in air. structural components. STRESS RELIEVING Immediately after quenching, the piece should be After rough machining, the tool should be heated sub-zero treated between -120 and -150°C, soaking through to 650 °C and held for 2 hours. Cool slowly time 3 - 4 hours, followed by tempering. Sub-zero to 500 °C, then freely in air. treatment will give a hardness increase of 1 - 3 HRC. HARDENING Avoid intricate shapes as there will be risk of Preheating temperature: 650 – 750 °C. cracking. Austenitising temperature: 990 – 1050 °C, but usually 1000 – 1040 °C. TEMPERING Choose the tempering temperature according to Hardness before the hardness required by reference to the tempering Temperature Soaking time* tempering graph. oC min HRC Temper at least twice with intermediate cooling 990 60 63 ± 2 to room temperature. The lowest tempering temperature which should be used is 180°C. The 1 010 45 63 ± 2 minimum holding time at temperature is 2 hours. 1 030 30 63 ± 2 Soaking time = Time at hardening temperature after the tool is TEMPERING GRAPH fully heated through. Protect the tool against decarburisation and oxidation during austenitising. QUENCHING MEDIA z Forced gas/circulating atmosphere. z Vacuum (high speed gas with sufficient overpressure). z Martempering bath or fluidised bed at 180-500oC then cool in air blast. z Circulating air or atmposhere z Warm oil, approx. 80°C (only very simple geometries). Note: Temper the tool as soon as its temperature reaches 50 - 70°C. ASSAB XW-42 hardens through in all standard sizes. HARDNESS AS FUNCTION OF AUSTENISING TEMPERATURE 4 | ASSAB XW-42 MACHINING MILLING RECOMMENDATIONS FACE AND SQUARE SHOULDER MILLING Milling with carbide The cutting data below are to be considered as Cutting data parameters guiding values and as starting points for developing Rough milling Fine milling your own best practice. Condition: Soft annealed condition ~210 HB Cutting speed (vC) 90 – 130 130 – 180 m/min TURNING Feed (f ) z 0.2 – 0.4 0.1 – 0.2 mm/tooth Turning Depth of cut (a ) p 2 – 4 ≤ 2 Turning with carbide with high mm Cutting data speed steel parameters Carbide Rough Fine Fine turning designation K20, P20* K20, P20* turning turning ISO Cutting speed * Use a wear-resistant Al O coated carbide grade 100 – 150 150 – 200 12 – 15 2 3 (vC ), m/min Feed (f) END MILLING 0.2 – 0.4 0.05 – 0.2 0.05 – 0.3 mm/rev Type of milling Depth of cut Cutting data Carbide (ap) 2 – 6 ≤ 2 ≤ 2 parameters High speed Solid carbide indexable mm steel insert Carbide designation K15 - K20* K15 - K20* – Cutting speed 1) ISO 70 – 100 80 – 110 12 – 17 (vC), m/min * Use a wear-resistant Al O coated carbide grade Feed (f ) 2 3 z 0.03 – 0.20 2) 0.08 – 0.20 2) 0.05 – 0.35 2) mm/tooth Carbide designation – K15 – K20 – DRILLING ISO HIGH SPEED STEEL TWIST DRILL 1) For coated HSS end mill, Vc = 25 - 30 m/min 2) Depending on radial depth of cut and cutter diameter 3) Use a wear-resistant Al2O3 coated carbide grade Drill diameter Cutting speed (vC) Feed (f) mm m/min mm/r ≤5 10 – 12 * 0.05 – 0.15 5 – 10 10 – 12 * 0.15 – 0.20 GRINDING 10 – 15 10 – 12 * 0.20 – 0.25 A general grinding wheel recommendation is 15 – 20 10 – 12 * 0.25 – 0.35 given below. More information can be found in the publication ”Grinding of tool steel”. * For coated high speed steel drill, vC = 18 - 20 m/min CARBIDE DRILL Type of grinding Soft annealed Hardened Type of drill Face grinding B151 R75 B3 1) A 46 HV straight wheel A 46 GV 2) Cutting data parameters Indexable Carbide Face grinding 3SG 36 HVS 2) Solid carbide 1) A 24 GV insert tip segments A 36 GV Cylindrical B126 R75 B3 1) Cutting speed A 46 KV 2) 130 – 150 70 – 90 35 – 45 grinding A 60 KV (vC), m/min B126 R75 B3 1) Internal grinding A 46 JV A 60 HV Feed (f) 0.05 – 0.25 2) 0.10 – 0.25 2) 0.15 – 0.25 2) mm/r B126 R100 B6 1) Profile grinding A 100 LV A 120 JV 2) 1) Drill with replaceable or brazed carbide tip 1) If possible, use CBN wheels for this application 2) 2) Depnding on drill diameter Preferably a wheel type containing sintered Al2O3 ASSAB XW-42 | 5 WELDING SURFACE TREATMENT There is a general tendency for tool steel to crack after welding.
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