Description.A2 Tool Steel,1.2363,SKD12,XW10.AISI A2 tool steel is one of A group cold works steel in ASTM A681 standard.A2 Tool Steel is a versatile,air hardening chromium alloy tool steel that replaces O1 tool steel when safer hardening,less distortion and increased wear resistance are required.AISI type A2 steel is intermediate in wear resistance between O1 oil-hardening tool A Simplified Guide to Heat Treating Tool SteelsTool steels should always be annealed prior to re-hardening and annealed steels should be re-annealed after welding.Unlike hardening which requires a quench after soaking at the hardening temperature,the essence of annealing is very slow cooling from the annealing temperature.By way of example,A2 tool steel is annealed by heating to 1550 degreesA1 tool steel heat treatment BladeForumsJul 11,2017·I saw this the other day.From Heat Treating,Including Steel Heat Treating in the New Millennium (ASM Heat Treating Society) 2000.A2 oil quenched from 1775°F had RA 16-18% (as quenched),64-65HRC.A single 400°F temper had no change on RA,but reduced hardness to ~60HRC.
IntroductionTemperingAnnealingForgingHeat TreatmentAir-hardening,medium alloy,cold work steels or group A steels include the A2,A3,A4,A6,A7,A8,A9,and A10 steels.Sufficient amounts of manganese,molybdenum and chromium present in group A steels provide full hardness in sections comprising thickness of at least 100 mm (4 in.) in diameter when air cooled.Carbon content of group A steels range from 0.5 to 2%.These steels are provided with air hardening characteristics that allow minimum cracking and distortion on quenching.A10 air-hardening,See more on azomA2 Tool Steel - NQA ISO certificated factory worldwide A2 tool steel properties.A2 is also an air-hardening tool steel but includes less than half the chromium (4.75 5.50%) and a bit less carbon (0.95 1.05%) than D2.Its highly wear-resistant and moderately tough.Like D2,it is incredibly resistant to distortion during heat treatingA2 Tool Steel Hardness (before heat treating,raw material Oct 08,2019·Annealing.Annealing must be performed after hot working and before re-hardening.Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1550°F (843°C),and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum.Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (538°C).A2Air Hardening Tool Steel AISI A2 is an air-hardening tool steel containing 5 pct chromium.It replaces O1 when safer hardening,better dimensional stability,and increased wear-resistance are required.Use for dies,punches,and similar forming and blanking tools as recommended for Type O1,but where less distortion in heat-treatment or better wear-resistance is required.
Tool Die Steel Handbook C 0.65 - 0.75 Si 0.50 max Mn 1.80 - 2.50 Cr 0.90 - 1.20 Mo 0.90 - 1.40 Ni 0.30 max AISI A-6 Air Hardening Die Steel Typical Analysis Advantages Air hardening from low temperature. Excellent size stability in heat treatment. Deep hardening. Easy to machine.Availability Moderately available,not as Crucible Tool Steel and Specialty Alloy General InformationFor the higher alloyed tool steels which harden from over 2000°F,the quench rate from about 1800°F to below 1200°F is critical for optimum heat treat response and material toughness.No matter how tool steels are quenched,the resulting structure,martensite,is extremely brittle,and under great stress.If put into service in this condition,most tool steels would shatter.Some tool steels will spontaneouslyCrucible Tool Steel and Specialty Alloy General InformationProperties of Tool Steels Hardness Hardness is a measure of a steels resistance to deformation.Hardness in tool steels is most commonly measured using the Rockwell C test.Hardened cold work tool steels are generally about 58/64 HRC (hardness Rockwell C),depending on the grade.
Airkool (AISI A2) is an air-hardening medium alloy tool steel which is heat treatable to HRC 60-62.It has wear resistance intermediate between the oil hardening tool steels (O1) and the high carbon chromium tool steels (D2).Because it offers a combination of good toughness along with moderate wear resistance,ithas been widely used for many Dimensional Changes After Heat TreatmentMay 07,2013·For example,an 80 mm (3.15) cube of D-2 tool steel (Fig.2) reveals growth (0.08%) in one dimension and shrinkage in the other two dimensions as a result of vacuum hardening.This graph demonstrates how knowing the part orientation from the mill-supplied bar is important when trying to plan for size change during heat treatment.File Size 167KBPage Count 3A6 Steel A6 Technical Data - Tool Steel High Speed SteelMachinability 80% of a 1% carbon steel; Heat Treating Instructions Hardening.Critical Temperature Ac1 1340ºF (727ºC) Preheating Heat at a rate not exceeding 400ºF per hour (222ºC per hour) to 1200-1300ºF (649-704ºC) and equalize.Austenitizing (High Heat) Heat slowly from the preheat.Furnace or Salt 1525-1625ºF (829-885ºC) Soak for 30 minutes for the first inch (25.4 mm) of thickness,plus 15
The resultant hardness should be a maximum of 255 HBW.Cryogenic Treatment Refrigeration treatments should typically be performed after the first temper,and must be followed by a second temper.All tool steel is sold as annealed with the exception of P20 and 4140HT,which are heat treated toHeat Treatment of Tool Steels Metallurgy for DummiesPreheatingQuenchingTemperingAnnealingSize ChangeDeep-FreezingPreheating,or slow heating,of tool steels provides two important benefits.First,most tool steels are sensitive to thermal shock.A sudden increase in temperature of 1500/2000°F may cause tool steels to crack.Second,tool steels undergo a change in density or volume when they transform from the as-supplied annealed microstructure to the high temperature structure,austenite.If this volume change occurs nonuniformly,it can cause unnecessary distortion of tools,especially where differences in sectioSee more on metallurgyfordummiesSpeedy Metals Information for D2 Tool SteelWhen desirable to relieve the strains of machining,heat slowly to 1050°-1250°F,allow to equalize,and then cool in still air (Strain Relieving).PREHEAT PRIOR TO HARDENING.Preheat slowly to 1350°-1450°F and hold at this temperature until material is uniformly heated.HARDENING.After thorough preheating,heat to 1800°-1850°F.High Speed Steel Tool Steel O1 O1 Technical DataPreheating Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1200-1300°F (649-704°C) and equalize.Austenitizing (High Heat) Heat slowly from the preheat to 1475-1500°F (802-816C) Soak for 30 minutes for the first inch (25.4 mm) of thickness,
D2 tool steel is high carbon,high chromium tool steel and air-hardening very high wear resisting properties.It is an exceptionally hardening steel and will be practically free from size change after proper treatment.The high percentage level of chromium gives it mild corrosion-resisting properties in the solidified condition.O1 Tool Steel - Oil-Hardening Cold-Work Steel (UNS T31501)IntroductionOther DesignationsMachinabilityHardeningWeldingHeat TreatmentForgingAnnealingTemperingMartemperingCold-work tool steels are high carbon steels that are further classified into three subgroups such as oil-hardening steels,high-carbon,high-chromium steels,and air-hardening steels.Oil-hardening cold-work steels are also known as group O steels consisting of O1,O2,O6,and O7 types.Type O1 oil-hardening cold-work steel consists of chromium,manganese,and tungsten and is relatively inexpensive.The following datasheet provides details about O1 type.See more on azomPublished Jul 24,2012Speedy Metals Information for A2 Tool Steel PlateHeat_Treating.Tolerances.Speedy Metals items.A2 tool steel is a 5% chromium medium alloy cold work tool steel possessing sufficient hardenability to be air hardened to 60 Rc surface hardness level with good depth of hardening.This widely used tool steel has low distortion in heat treatment,good machinability,good toughness for severe Predicting Size Change from Heat Treatment Production D-2 is a transformation hardening tool steel that requires both a hardening and tempering step during the heat treating process.The dimensional changes on hardening (Figure 1) and tempering (Figure 2) should be added together when trying to estimate total size change.Final part hardness is determined by tempering temperature.
A2 tool steel is a 5% chromium medium alloy cold work tool steel possessing sufficient hardenability to be air hardened to 60 Rc surface hardness level with good depth of hardening.This widely used tool steel has low distortion in heat treatment,good machinability,good toughness for severe service,high abrasion resistance,and deep hardening properties in large sections.Tool Steel Resource Guide A2,D2,M2,S7,O1,W1,A6 A2 Tool Steel.A2 tool steel is an air hardening,cold work,chromium alloy die steel that is preferable to O1 tool steel in applications requiring greater size stability,machinability and safer hardening.The wear resistance properties and cost place A2 between that of O1 and D2 tool steel making it a good all purpose grade for many applications.
OverviewUsesDescriptionClimateIntroductionTreatmentCharacteristicsS7 Shock-Resisting Tool Steel is an air or oil hardening tool steel that is characterized by very high impact toughness.The combination of strength and high toughness makes it a candidate for a wide variety of tooling applications.It can be used successfully for both cold and hot work applications.Also suitable for hot work tools where the operating temperature does not exceed 1000°F (538°C).For plastic injection molds,S7 tool steel is available as a remelted,mold-quality product.The remelting process miSee more on hudsontoolsteelA2 tool Steel Properties - Steel ExpressA2 tool steel properties.A2 tool steel is an air hardening,cold work steel.A2 is a 5% Chromium steel which provides high hardness after heat treatment with good dimensional stability.It is heat treatable and will offer a hardness in the range 57-62 HRC.The lower chromium content in A2 tool steel means that it does not provide the same wear Tool steel O1,W1,A2 which one for me?Dec 15,2020Trying to harden air hardening steel with a torchOct 27,2016Correct method of heat treatment of A2 tool steel question·A2 tool steel properties A2 is also an air-hardening tool steel but includes less than half the chromium (4.75 5.50%) and a bit less carbon (0.95 1.05%) than D2.Its highly wear-resistant and moderately tough.Like D2,it is incredibly resistant to distortion during heat treating and is moderately machinable and grindable.What are Properties of Tool Steel - A2 Steel - Definition Tool steel refers to a variety of carbon and alloy steels that are particularly well-suited to be made into tools.A2 tool steel is an air hardening,cold work steel of group A steels containing molybdenum and chromium.A2 steel contains 5% of chromium steel which provides high hardness after heat treatment with good dimensional stability.