Description
C28500 is a lead-free material that, despite its absence of lead content, exhibits favorable machining characteristics due to its structural composition. Consequently, C28500 can serve as a cost-effective substitute for traditional lead-containing machining brass, especially in applications where stringent demands for mechanical properties and corrosion resistance are not essential.
Chemical Composition
Mechanical Properties According To ASTM B927 (As Per Temper HO2)
Range (Inch) |
From |
To |
UTS Min (Ksi) |
PS Min (Ksi) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
Round (Dia) |
0.059 |
0.500 |
69 |
43 |
8 |
– |
– |
0.500 |
1.000 |
65 |
36 |
12 |
– |
– |
1.000 |
2.953 |
59 |
26 |
16 |
– |
– |
Hexagon (A/F) |
0.118 |
0.500 |
69 |
43 |
8 |
– |
– |
0.500 |
1.000 |
65 |
36 |
12 |
– |
– |
1.000 |
2.756 |
59 |
26 |
16 |
– |
– |
Square (A/F) |
0.118 |
0.500 |
69 |
43 |
8 |
– |
– |
0.500 |
1.000 |
65 |
36 |
12 |
– |
– |
1.000 |
2.362 |
59 |
26 |
16 |
– |
– |
Rectangle (Thickness) |
0.118 |
0.500 |
69 |
43 |
8 |
– |
– |
0.500 |
1.000 |
65 |
36 |
12 |
– |
– |
1.000 |
1.969 |
59 |
26 |
16 |
– |
– |
Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
Round (Dia) |
1.5 |
12 |
480 |
300 |
8 |
– |
– |
12 |
25 |
450 |
250 |
12 |
– |
– |
25 |
75 |
410 |
180 |
18 |
– |
– |
Hex (A/F) |
3 |
12 |
480 |
300 |
18 |
– |
– |
12 |
25 |
450 |
250 |
12 |
– |
– |
25 |
70 |
410 |
180 |
18 |
– |
– |
Square (A/F) |
3 |
12 |
480 |
300 |
8 |
– |
– |
12 |
25 |
450 |
250 |
12 |
– |
– |
25 |
50 |
410 |
180 |
18 |
– |
– |
Rectangle (Thickness) |
3 |
12 |
480 |
300 |
8 |
– |
– |
12 |
25 |
450 |
250 |
12 |
– |
– |
25 |
50 |
410 |
180 |
18 |
– |
– |
PHYSICAL PROPERTIES |
Melting Point – Liquidus°F |
1650 |
Melting Point – Solidus°F |
1630 |
Densitylb/cu in. at 68°F |
0.303 |
Specific Gravity |
8.39 |
Electrical Conductivity% IACS at 68°F |
29 |
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F |
58 |
Coefficient of Thermal Expansion 68-21210⁻⁶ per °F (68 – 212°F) |
11 |
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) |
121 |
Specific Heat CapacityBtu/ lb /°F at 68°F |
0.09 |
Modulus of Elasticity in Tensionksi |
12300 |
FABRICATION PROPERTIES |
Technique |
Suitability |
Soldering |
Excellent |
Brazing |
Excellent |
Oxyacetylene Welding |
Good |
Gas Shielded Arc Welding |
Fair |
Coated Metal Arc Welding |
Not Recommended |
Spot Weld |
Good |
Seam Weld |
Not Recommended |
Butt Weld |
Good |
Capacity for Being Cold Worked |
Fair |
Capacity for Being Hot Formed |
Excellent |
Forgeability Rating |
100 |
Machinability Rating |
60 |