Steel Tube Bearing Steel GKZ Cold Drawn SUJ2 Seamless Tubing
New-Era Steel Tube Bearing Steel GKZ Cold Drawn SUJ2 Seamless Tubing
1. Features
Bearing steel tube is a sort of hot-rolled or cold-rolled (cold-drawn) seamless steel tube. It withstands great pressure
and friction force, so bearing steel tube own high and uniform hardness and abrasive resistance and elastic max.
There are strict requirements for bearing tube, particularly the uniformaity of chemical composition, non-metallic inclusion
content and distribution of carbides.
| roduct Name |
Cold Drawn Precision Steel Tube Cold Rolled Precision Steel Tube |
| Materials | Carbon Steel ,Alloy steel ,Bearing Steel ,Stainless Steel |
| Shape | Round ,Triangle,Hexagon,Square,Rectangular,Octagon or as customer’s drawing |
| Technics | Cold Drawn ,Cold Rolled |
| Surface Treatment | Oiled,Brightness |
| Length | As customer’s demand |
| Tolerance | +-0.1mm, +-0.05mm |
| Application | Precision machine parts, Parts for Car,Auto and Motorcycle ,Sleeve Pipe |
| Delivery Condition | 1. BK (+C) 2. BKW (+LC) 3. BKS (+SR) 4. GBK (+A) 5. NBK (+N) |
2. Similar Standards
| Chinese | American | German | Japanese |
| GB | AISI | DIN | JIS |
| GCr15 | SAE52100 | 100Cr6/ EN31 | SUJ2 |
3. Chemical Composition
| Grades | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| GCr15/52100 | 0.95-1.05 | 0.15-0.35 | 0.2-0.4 | ≤0.027 | ≤0.02 | 1.3-1.65 | ≤0.1 | ≤0.25 | ≤0.3 |
| 100Cr6 | 0.95-1.05 | 0.15-0.35 | 0.25-0.45 | ≤0.025 | ≤0.025 | 1.4-1.65 | ≤0.08 | ≤0.25 | ≤0.3 |
4. Heat Treatment
| Quenching | Tempering | ||||
| Heating Temperature/ºC | Cooling | Hardness/HRC | Heating Temperature/ºC | Cooling | Hardness/HRC |
| 830-850 | Oil | 62-65 | 150-190 | Air | 58-62 |
5. Mechanical Properties of ASTM A295 52100 Bearing Steel
| Properties | Metric | Imperial |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Hardness, Brinell | - | - |
| Hardness, Knoop (converted from Rockwell C hardness) | 875 | 875 |
| Hardness, Rockwell C (quenched in oil from 150°C tempered) | 62 | 62 |
| Hardness, Rockwell C (quenched in water from 150°C tempered) | 64 | 64 |
| Hardness, Rockwell C (quenched in oil) | 64 | 64 |
| Hardness, Rockwell C (quenched in water) | 66 | 66 |
| Hardness, Vickers (converted from Rockwell C hardness) | 848 | 848 |
| Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) | 40 | 40 |
Production Steel BearingTube 100Cr6/GCr15/52100 :
Tags:Bearing Steel 52100,Bearing tubes 100Cr6,ASTM A295/A295M bearing steel tubes,
SUJ2 Seamless Tubing;New-Era Steel Tube
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