Machinery's Handbook, 31st Edition
Powder Metallurgy Materials 1545 Table 3 shows basic materials for soft magnetic parts. Complete standard specifications for iron-phosphorous powder metallurgy parts for soft magnetic applications are covered in ASTM Standard A839-15 and MPIF Standard 35. Table 3. PM Materials for Soft Magnetic Parts
Magnetic Properties
Maximum Permeability H/m
MPIF Designation Code a Composition
Density b g/cm 3
Induction (kG)
Material
FF-0000 <0.03C FY-4500 0.45P FS-0300 3Si FN-5000
Iron
6.6 6.8 7.2 7.5
9.0
1700 2300 5000
Phosphorus iron
10.5 13.0 12.0
Silicon iron Nickel iron
12000
a Reference: MPIF Standard 35, “Materials Standards for PM Structural Parts.” b Density is given as typical values.
Some powder materials (PM) for nonferrous structural parts are given in Table 4. ASTM Standard B823-15 and MPIF Standard 35 give complete information on nonferrous pow der metallurgy (PM) materials for structural parts. Table 4. PM Materials for Nonferrous Parts Material MPIF Designation Code a Composition Density b g/cm 3 Usage and Characteristics Copper C-0000 0.2 max. other 8.0 Electrical parts, conductivity 85% IACS Bronze CTG-1001 10Sn, 1 Graphite 6.2 Self-lubricating bearings, 22% minimum oil content
CZ-1000 10Zn CZ-3000 30Zn CNZ-1818 18Ni, 18Zn
Hardware items, yield strength 76MPa. Hardware items, yield strength 110MPa
Red brass
7.9 7.6 7.9
Yellow brass Nickel silver
Appearance, corrosion resistance, yield strength 138MPa Light weight, corrosion resistance, good electrical, thermal conductivity, T4 condition tensile strength 220MPa.
Aluminum
4Cu, 0.5Mg, 1Si
2.6
a Reference: MPIF Standard 35, “Materials Standards for PM Structural Parts.” b Density is given as typical values.
Table 5 shows materials used for self-lubricating bearings. More information about these materials, and other PM materials for self-lubricating bearings are given in ASTM Standard B438-17, ASTM B439-18, and MPIF Standard 35. Table 5. Materials for Self-Lubricating Bearings Material MPIF Designation Code a Density b g/cm 3 Oil Content Volume% K Strength MPa Bronze CT-1000 CTG1001-K 6.0–6.4 6.4–6.8 24 17 130 160
Diluted bronze Iron graphite
FCTG-3604-K FG-0303-K
6.0–6.4 5.6–6.0
17 18
150 70
a Reference: MPIF Standard 35, “Materials Standards for PM Structural Parts.” b Density is given as typical values.
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