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Chrome steel is the most common material used to produce the load carrying components in precision ball bearings, and it offers a cost-effective alternative to stainless steel. While less resistant to corrosion, chrome steel is durable and still resistant to corrosive factors in certain environments.
| Country | USA | German | Japan | British | European Union | China |
| Standard | ASTM A295 | DIN 17230 | JIS G4805 | BS 970 | DIN 17230 | GB |
| Grades | 52100 | 100Cr6/1.3505 | SUJ2 | 535A99/EN31 | 100Cr6 | GCr15 |
| Polymer | Chemical Name | Polymer | Chemical Name |
| PTFE | Polytetrafluoroethylene | PVDF | Polyvinylidene difluoride |
| PEEK | Polyetheretherketone | PI | Polyimide |
| POM | Polyoxymethylene | PE | Polyethylene |
| HDPE | High-density polyethylene | HMW-PE | High-molecular-weight polyethylene |
| UHMW-PE | Ultra-high-molecular-weight polyethylene | PPS | Polyphenylene sulfide |
| PA66 | Nylon 66 | PA6 | Nylon 6 |
| PA46 | Nylon 46 | PP | Polypropylene |
| PBT | Polybutylene terephthalate | ABS | Acrylonitrile Butadiene Styrene |
Ceramic Material Comparison Table
Materials
The performance of any bearing, whether it's ball bearings, roller bearings, or others, depends on the characteristics of the chosen alloy and its heat treatment, which are key to maintaining its excellent performance. The correct hardness, corrosion resistance, and fatigue life of these materials directly affect the reliability and stability of bearings under various operating and environmental conditions.
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Material Properties |
Heat Treament Properties |
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|---|---|---|---|---|---|---|---|---|
|
Material |
Specification |
Melt Method |
Features and Advantages |
Hardness At Room Temp. (HRC) |
Operating Temp. Limit |
Heat Treatment Attributes |
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|
52100 |
AMS 6440 |
Vacuum degassed |
Available in tube form |
60-64 |
310 °F |
Good wear and fatigue properties |
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|
AMS 6444 |
CEVM* |
Premium quality |
58-62 |
400 °F |
Improved thermal stability |
|||
|
60-64 |
310 °F |
Good wear and fatigue properties |
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|
58-62 |
400 °F |
Improved thermal stability |
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|
440C |
AMS 5880 |
Air melt or vacuum degassed |
Corrosion resistance |
58-62 |
325 °F |
Good wear properties |
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|
56-60 |
825 °F |
Thermal stability with corrosion resistance |
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|
AMS 5618 |
CEVM* |
Premium quality |
58-62 |
325 °F |
Good wear properties |
|||
|
56-60 |
825 °F |
Thermal stability with corrosion resistance |
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* Consumable Electrode Vacuum Melted.
9Cr18 stainless steel is a high-carbon, high-chromium martensitic stainless steel known for its excellent hardness, wear resistance, and corrosion resistance. It is widely used in various high-demand industrial applications. Here is a detailed introduction to 9Cr18 stainless steel.
| 9Cr18 Chemical Composition % | |||||||
| Steel Grade | C | Si (≤) | Mn (≤) | P (≤) | S (≤) | Cr | Ni (≤) |
| 9Cr18 (95Cr18) | 0.90-1.00 | 0.80 | 0.80 | 0.040 | 0.030 | 17.00-19.00 | (0.60) |
| Equivalent | |||||||||||
| China | USA | Germany | Japan | France | UK | ||||||
| Standard | Grade | Standard | Grade | Standard | Grade | Standard | Grade | Standard | Grade | Standard | Grade |
| GB/T 1220 | 9Cr18 (95Cr18) | AISI, ASTM A276/A276M |
440C | DIN EN 10088-3; DIN 1.7440, DIN 1.7222 |
X105CrMo17 (1.4125) | JIS G4303 | SUS 440C | NF A35-572, NF A35-576-582, NF A35-584 |
Z100CD17 | EN 10088-3 |
X105CrMo17 (1.4125) |
Extended reading：
95Cr18, 9Cr18 Stainless Steel Material Table Description
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