Specifications
|
Material |
CDA |
Federal |
Military |
ASTM |
UNS |
AMS |
|
Chrome Steel |
52100 |
FED STD66b
E 52100 |
MIL-S 980A(-1)
MIL-B 1083C |
A295-46T
TYPE A |
6440E
G-52986 |
-MS 19059
7440(52100) |
Chemical Analysis
|
Carbon |
0.98% to 1.05% |
|
Chromium |
1.30% to 1.60% |
|
Manganese |
0.25% to 0.45% |
|
Silicon |
0.15% to 0.35% |
|
Sulphur |
0.008% maximum |
|
Phosphorus |
0.020% maximum |
Mechanical Properties
|
Tensile Strength |
325,000 psi |
|
Yield Strength |
295,000 psi |
|
Elongation in two inches |
5% |
|
Reduction in area |
8% |
|
Modulus of elasticity |
29,500,000 psi |
|
Density |
0.283 lbs./cu. in. |
|
Hardness |
60-67 HRC |
|
|
|
|
Chromium (Cr) has a tendency to increase hardness penetration. Chromium also increase the toughness and wear resistance of steel. Probably one of the most well known effects of chromium on steel is the tendency to resist staining and corrosion. Steels with 12% or more chromium are referred to as stainless steels. |
Magnetic Susceptibility
|
Chrome steel is aproximetly 96% iron and fully magnetic. |
Welding
|
A preheat of 752 F (400oC) and a slow cooling rate is necessary during the welding process to prevent cracking. An electrode with similar composition of the base metal is required. |
Applications
|
Chrome steel balls are widely used in precision ball bearings, as well as most industrial applications. Less expensive case-hardened carbon steel steel balls are used in consumer goods like drawer slides and casters. Chrome steel balls have excellent surface quality, high hardness and high load bearing capacity as a result of through hardening (Rockwell C 60-67). Chrome steel is a chrome alloy carbon steel not a chrome plated steel. | |
