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Help Center27simn Cylinder Steel Tube With Competitive Price
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27simn cylinder steel tube With competitive price
1.Variety
Processing |
Cylinder I.D |
Length /mm |
Straightness |
Size accuracy |
Inner bore roughness |
Cold-drawn |
30~250 |
≤12M |
0.3~1.0mm/m |
H8-H10 |
0.8~1.6um |
Honed tube |
40~400 |
≤10M |
0.3~1.0mm/m |
H7-H9 |
0.4~0.8um |
SRB |
40~400 |
≤7M |
0.3~1.0mm/m |
H8 |
0.1~0.4 |
2. Material Specification and Ref. Document
ST52,BK+S,DIN2391 or Equivalent
3. Chemical Compisition (%)
| C | Mn | Si | S(Max) | P(Max) | |
| CK20 | 0.17-0.24 | 0.35-0.65 | 0.17-0.37 | 0.035 | 0.035 |
| CK45 | 0.42-0.5 | 0.5-0.8 | 0.17-0.37 | 0.035 | 0.035 |
| St52 | ≤ 0.22 | ≤ 1.6 | ≤0.55 | 0.025 | 0.025 |
| 27SiMn | 0.24-0.32 | 1.1-1.4 | 1.1-1.4 | 0.035 | 0.035 |
4. Mechanical Properties
Material |
Tensile strength |
Yield strength |
Elongation
|
Hardness |
Ck20 |
510 σ N/mm2 |
500σsN/mm2 |
5δs% |
175HB |
Ck45 |
660 σN/mm2 |
630σsN/ mm2 |
4δs% |
207HB |
ST52 |
580σ N/mm2 |
420σsN/ mm2 |
10δs% |
190HB |
27SiMn |
840σ N/mm2 |
805σsN/ mm2 |
7.5δs% |
230HB |
5. Supply Condition
Cold drawn seamless steel tube, stress relieved and honed or skived roller burnished
6. Surface Roughness
Ra = 0.4~0.8 Micron
Process
- Cold drawn/cold rolled
Annealing furnace——+SR
Straightener—— Straightening
- Straightness inspecting
- Dimension inspecting
- Sawing
- Lathe
- Honed
- Products inspecting
- Finished Products
Our Reputation
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