Xionghai permanent magnets preparesits anisotropic powders by either casting an alloy melt into a mold, or strip casing. Strip Casting offers the advantage of better chemical stability. Subsequently, the ingot from the mold or the flakes from Strip Casting are pulverized to a uniform grain/particle size. The best method for obtaining the desired grain size is by HDDR. The HDDR [hydrogenation-decomposition-desorption-recombination] process yields a more homogenous particle size with a minimum of α-Fe, and Nd-rich phases. Anisotropic Nd-Fe-B, HDDR powders prepared from strip cast alloys are used for the HAST [Highly Accelerated Stress Test] grades of NdFeB Magnets, including N, H, SH, UH, EH, and AH grades.
The Physical Properties of Neodymium Permanent Magnets Super Strong Magneti Neodimio Rare Earth Aimant Neodyme:
| Parameters | Units | Indicators |
| Density | g/cm³ | ≥7.3 |
| Home temperature | ℃ | 310-340 |
| BrReversible temperature coefficient | ℃/% | -0.100~-0.130 |
| HcjReversible temperature coefficient | ℃/% | 0.40~0.70 |
| Compressive strength | N/mm2 | 1050 |
| Bending strength | N/mm2 | 250 |
| Tensile strength | N/mm2 | 80 |
| Webster Hardness | | 600 |
| Coefficient of thermal expansion(20 to 200℃) | 10-6/k | ∥5⊥-1.5 |
| Specific heat | J/(Kg.K) | 460 |
| Thermal conductivity | W/(m.K) | 9 |
| Resistivity | μΩ.cm | 150 |
The Magnetic Properties of Neodymium Permanent Magnete Super Strong Magneti Neodimio Rare Earth Aimant Neodyme:
Magnetic Properties of Sintered NdFeB permanent magnets |
Grade | Remanence | Coercivity Force | Intrinsic Coercive Force | Max. Energy Product | maximum Operating Temp. | Br | Hcb | Hcj | ( BH ) max | mT | kGs | kA/m | kOe | kA/m | kOe | kJ/m3 | MGOe | N35 | 1170-1220 | 11.7-12.2 | ≥868 | ≥10.9 | ≥955 | ≥12 | 263-287 | 33-36 | 80 ℃ | N38 | 1220-1250 | 12.2-12.5 | ≥899 | ≥11.3 | ≥955 | ≥12 | 287-310 | 36-39 | 80 ℃ | N40 | 1250-1280 | 12.5-12.8 | ≥907 | ≥11.4 | ≥955 | ≥12 | 302-326 | 38-41 | 80 ℃ | N42 | 1280-1320 | 12.8-13.2 | ≥915 | ≥11.5 | ≥955 | ≥12 | 318-342 | 40-43 | 80 ℃ | N45 | 1320-1380 | 13.2-13.8 | ≥923 | ≥11.6 | ≥955 | ≥12 | 342-366 | 43-46 | 80 ℃ | N48 | 1380-1420 | 13.8-14.2 | ≥923 | ≥11.6 | ≥876 | ≥12 | 366-390 | 46-49 | 80 ℃ | N50 | 1400-1450 | 14.0-14.5 | ≥796 | ≥10.0 | ≥876 | ≥11 | 382-406 | 48-51 | 60 ℃ | N52 | 1430-1480 | 14.3-14.8 | ≥796 | ≥10.0 | ≥876 | ≥11 | 398-422 | 50-53 | 60 ℃ | 33M | 1130-1170 | 11.3-11.7 | ≥836 | ≥10.5 | ≥1114 | ≥14 | 247-263 | 31-33 | 100 ℃ | 35M | 1170-1220 | 11.7-12.2 | ≥868 | ≥10.9 | ≥1114 | ≥14 | 263-287 | 33-36 | 100 ℃ | 38M | 1220-1250 | 12.2-12.5 | ≥899 | ≥11.3 | ≥1114 | ≥14 | 287-310 | 36-39 | 100 ℃ | 40M | 1250-1280 | 12.5-12.8 | ≥923 | ≥11.6 | ≥1114 | ≥14 | 302-326 | 38-41 | 100 ℃ | 42M | 1280-1320 | 12.8-13.2 | ≥955 | ≥12.0 | ≥1114 | ≥14 | 318-342 | 40-43 | 100 ℃ | 45M | 1320-1380 | 13.2-13.8 | ≥995 | ≥12.5 | ≥1114 | ≥14 | 342-366 | 43-46 | 100 ℃ | 48M | 1360-1430 | 13.6-14.3 | ≥1027 | ≥12.9 | ≥1114 | ≥14 | 366-390 | 46-49 | 100 ℃ | 50M | 1400-1450 | 14.0-14.5 | ≥1033 | ≥13.0 | ≥1114 | ≥14 | 382-406 | 48-51 | 100 ℃ | 33H | 1130-1170 | 11.3-11.7 | ≥836 | ≥10.5 | ≥1353 | ≥17 | 247-271 | 31-34 | 120 ℃ | 35H | 1170-1220 | 11.7-12.2 | ≥868 | ≥10.9 | ≥1353 | ≥17 | 263-287 | 33-36 | 120 ℃ | 38H | 1220-1250 | 12.2-12.5 | ≥899 | ≥11.3 | ≥1353 | ≥17 | 287-310 | 36-39 | 120 ℃ | 40H | 1250-1280 | 12.5-12.8 | ≥923 | ≥11.6 | ≥1353 | ≥17 | 302-326 | 38-41 | 120 ℃ | 42H | 1280-1320 | 12.8-13.2 | ≥955 | ≥12.0 | ≥1353 | ≥17 | 318-342 | 40-43 | 120 ℃ | 45H | 1300-1360 | 13-13.6 | ≥963 | ≥12.1 | ≥1353 | ≥17 | 326-358 | 43-46 | 120 ℃ | 48H | 1370-1430 | 13.7-14.3 | ≥995 | ≥12.5 | ≥1353 | ≥17 | 366-390 | 46-49 | 120 ℃ | 33SH | 1130-1170 | 11.3-11.7 | ≥844 | ≥10.6 | ≥1592 | ≥20 | 247-271 | 31-34 | 150 ℃ | 35SH | 1170-1220 | 11.7-12.2 | ≥876 | ≥11.0 | ≥1592 | ≥20 | 263-287 | 33-36 | 150 ℃ | 38SH | 1220-1250 | 12.2-12.5 | ≥907 | ≥11.4 | ≥1592 | ≥20 | 287-310 | 36-39 | 150 ℃ | 40SH | 1240-1280 | 12.5-12.8 | ≥939 | ≥11.8 | ≥1592 | ≥20 | 302-326 | 38-41 | 150 ℃ | 42SH | 1280-1320 | 12.8-13.2 | ≥987 | ≥12.4 | ≥1592 | ≥20 | 318-342 | 40-43 | 150 ℃ | 45SH | 1320-1380 | 13.2-13.8 | ≥1003 | ≥12.6 | ≥1592 | ≥20 | 342-366 | 43-46 | 150 ℃ | 28UH | 1020-1080 | 10.2-10.8 | ≥764 | ≥9.6 | ≥1990 | ≥25 | 207-231 | 26-29 | 180 ℃ | 30UH | 1080-1130 | 10.8-11.3 | ≥812 | ≥10.2 | ≥1990 | ≥25 | 223-247 | 28-31 | 180 ℃ | 33UH | 1130-1170 | 11.3-11.7 | ≥852 | ≥10.7 | ≥1990 | ≥25 | 247-271 | 31-34 | 180 ℃ | 35UH | 1180-1220 | 11.8-12.2 | ≥860 | ≥10.8 | ≥1990 | ≥25 | 263-287 | 33-36 | 180 ℃ | 38UH | 1220-1250 | 12.2-12.5 | ≥876 | ≥11.0 | ≥1990 | ≥25 | 287-310 | 36-39 | 180 ℃ | 40UH | 1240-1280 | 12.5-12.8 | ≥899 | ≥11.3 | ≥1990 | ≥25 | 302-326 | 38-41 | 180 ℃ | 42UH | 1280-1320 | 12.8-13.2 | ≥899 | ≥11.3 | ≥1990 | ≥25 | 318-342 | 40-43 | 180 ℃ | 28EH | 1040-1090 | 10.4-10.9 | ≥780 | ≥9.8 | ≥2388 | ≥30 | 207-231 | 26-29 | 200 ℃ | 30EH | 1080-1130 | 10.8-11.3 | ≥812 | ≥10.2 | ≥2388 | ≥30 | 223-247 | 28-31 | 200 ℃ | 33EH | 1130-1170 | 11.3-11.7 | ≥836 | ≥10.5 | ≥2388 | ≥30 | 247-271 | 31-34 | 200 ℃ | 35EH | 1170-1220 | 11.7-12.2 | ≥876 | ≥11.0 | ≥2388 | ≥30 | 263-287 | 33-36 | 200 ℃ | 38EH | 1220-1250 | 12.2-12.5 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 287-310 | 36-39 | 200 ℃ | 40EH | 1250-1280 | 12.5-12.8 | ≥899 | ≥11.3 | ≥2388 | ≥30 | 287-310 | 38-41 | 200 ℃ | 28AH | 1040-1080 | 10.4-10.8 | ≥787 | ≥9.9 | ≥2624 | ≥33 | 207-231 | 26-29 | 230 ℃ | 30AH | 1080-1130 | 10.8-11.3 | ≥819 | ≥10.3 | ≥2624 | ≥33 | 223-247 | 28-31 | 230 ℃ | 33AH | 1130-1170 | 11.3-11.7 | ≥843 | ≥10.6 | ≥2624 | ≥33 | 247-271 | 31-34 | 230 ℃ | 35AH | 1170-1220 | 11.7-12.2 | ≥876 | ≥11.0 | ≥2624 | ≥33 | 263-287 | 33-36 | 230 ℃ |
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The Surface Coatings of Neodymium Permanent Magnete Super Strong Magneti Neodimio Rare Earth Aimant Neodyme:
Surface | Coating | thickness(um) | Coating Color | SST (hours) | PCT (hours) |
Nickel | Ni+Ni Ni+Cu+Ni | 10~20 | Bright Silvery | 24~72 | 24~72 |
Black Nickel | Ni+Cu+Ni | 10~20 | Bright Black | 48~96 | 48 |
Cr3+Zinc | Zn Cr-Zn | 5~8 | Bright Blue Shining Color | 16~48 36~72 | \ |
Sn | Ni+Cu+Ni+Sn | 10~25 | Silver | 36~72 | 48 |
Au | Ni+Cu+Ni+Au | 10~25 | Gold | 12 | 48 |
Ag | Ni+Cu+Ni+Ag | 10~25 | Silver | 12 | 48 |
Epoxy | Epoxy Ni+Cu+Epoxy Zn+Epoxy | 10-20 15-30 15-25 | Black / Grey | 48 72~108 72~108 | |
Passivation | \ | 1-3 | Dark Grey | Temporary Protection | \ |
Phosphated | \ | 1-3 | Dark Grey | Temporary Protection | |
Pictures of Neodymium Ring Magnet / Sintered NdFeB magnet / Neodymium Iron Boron Magnet / Sehr Starke Magnete:
