Stavax Mould Steel
Standard
AISI - 420DIN - 1.2083
JIS - SUS420J2
GB - T1220-2007
W-Nr - 1.2083
Equivalent
| Standard | Assab | Bohler | Edelstahl Buderus |
Thyssen | Hitachi | ||
| DIN | JIS | AISI | |||||
1.2083 |
SUS 420 J2 |
420 |
Stavax |
M310 |
2083 |
2083 |
- |
1.2316 |
- |
RaMaxS |
M300 |
- |
2316 |
HiPM38 |
|
Characteristic
Stavax adalah baja cetakan stainless premium untuk sisipan dan inti kecil dan menengah. Stavax menggabungkan ketahanan korosi dan aus dengan kemampuan poles yang sangat baik, kemampuan mesin yang baik, dan stabilitas dalam pengerasan.Kelebihan material stavax antara lain :
- Ketahanan korosi yang baik.
- Kemampuan poles yang sangat baik.
- Ketahanan aus yang baik.
- Kemampuan mesin yang baik.
- Stabilitas dimensi yang baik selama perlakuan panas.
Availability
Roundbar: 50mm - 220mm
Flat: 12mm - 200mm
Chemical Composition
| Type | C | Cr | Mn | Si | S | P | Ni | V | Mo |
| Stavax | 0.38 | 13.60 | 0.50 | 0.90 | 0.03 | - | - | 0.30 | |
| 2083 | 0.39 | 13.72 | 0.46 | 0.83 | 0.001 | 0.018 | - | 0.29 | - |
| 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 ~ 52HRCHeat 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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