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Jual Material Stavax

Stavax Plastic Mould Steel


Characteristic

  • Good corrosion resistance.
  • Excellent  polishability.
  • Good wear resistance.
  • Good machinability.
  • Good dimensional stability during heat treatment.


Standard

AISI - 420
DIN - 1.2083
JIS - SUS420J2
GB - T1220-2007
W-Nr - 1.2083


Equivalent

Assab RamaxS, Assab S-136, Assab stavax, Assab Holdax, Aubert & Duval X13T6, Bestar BE2083, Stavax, Bohler M303, Bohler Mirrax-40, Bohler M310, Buderus Edelstahlwerke ISO-B, Carrs Tool Steels P1008, Crucible CSM 420 XL, Deutsche Edelstahlwerke PKD, Eschmann-Stahl ES120K ESR, Eschmann-Stahl K45, Eschmann-Stahl ES120K, Ferlat Acciai 2083, Grimm Edelstahl BFR40, Hagener Gussstahlwerke WM40, Hitachi HPM38, Kind & Co RF, Kobelco Steel KTSM420, Latrobe Saxman6R, Lucchini Kaylos2083, Nippon Koshuha KSP1, Ossenberg BPS2, Platestahl BM260, Poldi AK4R, Sanyo QPD5, Schmidt+Clemens RH, Schmolz Bickenbach Formadur 2083, Stahlwerk Stahlschmidt Staro, Thyssen Edelstahl Thyroplast2083, Thyssenkrupp TES2083, Villares Metals VP420, Villares Metals VP420IM, WSM Werkzeugstahl WR413, Zapp C135M, 3Cr13,

Availability


Roundbar: 10mm - 220mm
Flat: 10mm - 100mm


Chemical Composition

Type C Cr Mn Si S P Ni V -
Stavac 0.38 13.60 0.50 0.90 0.03 - - 0.30
AISI 420 0.26-0.40 12.00-14.00 1.00 1.00 0.03 0.04 - 0.30
HPM38 0.38 13.60 0.50 0.75 0.03 - - 0.30


Mechanical Properties

Properties
Stavax
Tensile Strength, Rm (MPa) 1780
Yield Strength, Rp (MPa) 1460
Elongation in 2" (%) -
Hardness (HRc) 45-52
Reduction of Area (%) -
Charpy V-notch Impact Strength (toughness):
Longitudinal (ft/lb) -
Transverse (ft/lb) -


Physical Properties AISI 420

Properties
Stavax
Density (×1000 kg/m3) 7.64
Modulus of elasticity (GPa) 200
Thermal conductivity (100oC) [W/m.K] 24.9
Specific Heat (J/Kg.C) 460
Coefficient of thermal expansion 11.4x10-6


Hardness

Hardened & Tempered: 45 ~ 52HRC


Heat Treatment

Preheating:
600-850 ° 100 (1110-1560 ° F)Normally a minimum of Two preheating steps required.

Austenitizing:
100 ° 1000-1025 (1830 -1880 ° C) 1020 House usually 100 ° (1870 ° C). For a very large  Mould 1000 100 ° (1830 ° C) Recommended it.

Annealing: 
Protect the steel and heat through to 740 ° C(1365 ° F). Then cool in the furnace at 15 ° C (30 ° F)per hour to 550 ° C (1020 ° F), then freely in air.

Stress relieving: 
After rough machining the tool should be heated through to 650 ° C (1200 ° C), holding time 2 hours.Cool slowly to 500 ° C (930 ° F), then freely in air.

Tempering: 
Tempering at 250-300 ° C (480-570 ° F) results in the best combination of toughness, hardness and corrosion resistance.Holding time at that temperature is minimum 2 hours. HOWEVER, for very large molds  it is recommended to use a high tempering temperature to Reduce the residual stresses to a minimum.

Quenching:  
Interrupted oil to below 1000F (540C). Air cool to 150F (65C). Salt bath at 250–550°C, then cool in Airblast.

Applications

Molding of corrosive plastics such as PVC, Acetates and for molds that runs under humid working and storage condition, Molding of medical components such as syringes and analysis vials,etc.

Reference:
Surface finishing of hardened and tempered stainless tool steel using sequential ball grinding, ball burnishing and ball polishing processes on a machining centre,
Fang-Jung Shiou, Chih-Cheng Hsu,
Department of Mechanical Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, 106 Taipei, Taiwan
http://www.simplytoolsteel.com/420-ESR-stainless-steel.html


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