• fftty161 posted an update 2 weeks ago

    Black Silicon Carbide (SIC) is produced in an electric resistance furnace from quartz sand and petroleum coke or anthracite at high temperature. The hardness and sharp particle shape of SIC make it suitable for producing of grinding wheels, coated abrasives, wire saws, superior refractory materials and deoxideiser as well as for lapping, polishing and blasting.
    Chemical & Physical Properties
    Crystal FormAlpha SiC hexagonal system
    Chemical natureSlight acid
    Reaction with acidsVery slight surface action with hydrofluoric acid
    Reaction with AlkaliesAttcked at high temperature by alkalles and iron xide
    Oxidation-reduction effectsStarts to oxide slowly at 800oC. No reduction
    True Density (g/cm3)3.20
    HardnessKnoop (kg/cm2)2200-2500
    Color after firingBlack
    Decomposition point2200oC
    Max Usable temperature1540oC in air
    Specific heat (cal/g.oC)0oC500oC1000oC
    Coefficient of thermal conductivity (cal/cm2.sec.oC)600oC800oC1000oC
    Electrical resistivity (Wcm)25oC100oC400oC800oC1400oC
    Coefficient of liner expansion (x10-6)25oC-500oC25oC-1000oC25oC-1500oC25oC-2000oC25oC-2500oC
    Chemical Composition (by % weight)
    Grit10# – 90#100# -180#220# – 220#230# – 400 #500#-1200#
    SiC98.5 min98.0 min97.0 min96.0 min93.0 min
    F.C0.2 max0.3 max0.3 max0.4 max0.4 max
    Fe2O30.6 max0.8 max1.2 max1.5 max1.7 max
    Available grain sizes
    Grit No.MicronGrit No.MicronGrit No.Micron
    102360 ~ 200030710 ~ 60080212 ~ 180
    122000 ~ 170036600 ~ 50090180 ~ 150
    141700 ~ 140040500 ~ 425100150 ~ 125
    161400 ~ 118046425 ~ 355120125 ~ 106
    201180 ~ 100054355 ~ 300150106 ~ 75
    221000 ~ 85060300 ~ 25018090 ~ 63
    24850 ~ 71070250 ~ 21222075 ~ 53
    Available mircron powder sizes
    China GB 2477-83
    JISFEPA(84) / DIN(70)ISO(77)
    Grit No.Norminal size range(µm)Grit No.ds50 value (µm)Grit No.ds50 value (µm)Grit No.ds50 value (µm)
    Standard werte der Mikro-F-ReiheSedigraph 5000D
        24060.0±4.0   P24058.5±2.0
       28052.0±3.0   P28052.2±2.0
    W6363 – 5032046.0±2.5F230/5353±3.050.0±3.0P32046.2±1.5
    W5050 – 4036040.0±2.0F240/4544.5±2.042.0±2.0P36040.5±1.5
      40034.0±2.0   P40035.0±1.5
    W4040 – 2850028.0±2.0F280/3736.5±1.534.5±1.5P50030.2±1.5
    W2838 – 2070021.0±1.3F360/2322.8±1.521.6±1.5P80021.8±1.0
    W2020 – 14100015.5±1.0F500/1312.8±1.012.3±1.0P120015.3±1.0
    W1414 – 10120013.0±1.0     
    W1010 – 720008.5±0.7     
    W77 – 525007.0±0.7F800/76.5±1.06.3±1.0  
    W55 – 3.530005.7±0.5F1000/54.5±0.84.5±0.8  
    for general purposesfor general purposesfor bonded abrasivesfor coated abrasives
    Non-abrasive SiC (TN) (% by weight)
    Chemical Composition
    TypeSiC minF.C maxFe2O3 maxSize mm

    Vitrified toolsLapping
    Resinoid toolsBlasting
    PolishingInvestment casting
    TumblingWear resistance
    Lapping compoundWire saw

    • OK, NOW SIGN UP AND EARN DAILY BY CLICKING ON THE LINK: *काम बहुत Mushkil है कब तक जब तक आप शुरू नही करते हो, मैं आपको *एक बड़े ही खूबसूरत बिजनेस* के बारे में बता रहा हूं इसका नाम है * *यह*प्लान बिल्कुल फ्री* है और आप *फ्री में Join कर बहुत पैसा कमा* सकते हैं First Earn and then pay one time Fee of the company which will provide you full support all the time i.e. round the clock…से ही *आप Join करते हैं* आपको *उसी समय Rs. 20/- मिलते हैं* और हर *रोज Bonus Income होती है। जैसे ही आप *अपने रेफर से लोगों को ज्वाइन* करवाते हैं आपको *Rs. 820/- 1st लेवल अचीवर बोनस + हर रोज वही मिलेंगे फिर वैसे ही आपके रेफरल भी अगर *अपने रेफर से लोगों को ज्वाइन* करवाते हैं तो आपके *2nd लेवल onward में लोग* जुड़ जाएंगे। तब आपको *Rs. 20/- 10th लेवल tak अचीवर बोनस + हर रोज वही मिलेंगे ….// कर्म नहीं करने वालों को नसीब साथ नहीं देता // Sanch kahoo na jhooth jara si , Savalshah Khatu ke vaasi ( Jai Baba Ri ) . First click on read more below and read it thoroughly.YOU ARE THE FORTUNATE ONE TO GET THE LINK.Believe me, click on the given blue link above or Copy & Paste the link in a new window and signup/join .NO PLAN IN INDIA IS GIVING AS MUCH MONEY AS THIS.AND MOREOVER IT IS REALLY PAYING. Refer and Earn Real Income,AND FOR COMPLETELY FREE , I have so far , earned more than Rs 31 Lacs+- & Still Counting ( I AM AT 3rd POSITION IN ALL INDIA RANK i.e. IN 20 GEMS OF Earnzone for more than 6 months constantly Which is very CHARISMATIC OF COURSE, TO ME also .One Click Money Transfer right into Your Account. Moreover , No repeat NO Fee for JOINING initially BUT IT IS ADVISED TO PAY THE FEE AND THEN Earn ( Rs 800 /-+ Rs.20/-=Rs 820/-) Per REFERAL REPEATEDLY AND UNLIMITED DAY BY DAY and much more . Hurry Join Now immediately and grab the position at the earliest ,Click on this link given herewith and sign up CALL 93XXXXXX98 ALSO SEEN AT THE SITE in case of any doubt is very good! .. ” स्पेशल चाइल्ड वेलफेयर ऑर्गेनाइजेशन परिवार की तरफ से New Year,2019 की हार्दिक शुभकामनाएं “……..मे आप सब का धनयवाद करता हू…… Join the site and earn daily , Click on it and sign up and start earning immediately

Skip to toolbar