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Specifications
Standard:DIN2391 En10305ISOH8/H9
Straightness:0.3~0.8mm/m
Inside Roughness:0.2~0.6um
Honed tube
Honed tube
|
Processing
|
Cylinder diameter |
Length /mm |
Straightness |
Size accuracy |
Wall thickness/mm |
Inner bore roughness |
Cold-drawn |
ID50~OD325 |
≤12m |
0.3~0.8mm/m |
|
±8% |
0.8~1.6um |
Honed tube |
ID50~OD325 |
≤10m |
0.3~0.8mm/m |
H8~H9 |
±8% |
0.2~0.6um |
Material |
Tensile strength |
Yield strength |
Elongation
|
Hardness |
Ck20 |
530 N/mm2 |
505σsN/mm2 |
12δs% |
175HB |
Ck45 |
660 σN/mm2 |
630σsN/ mm2 |
6δs% |
207HB |
ST52 |
580σ N/mm2 |
420σsN/ mm2 |
10δs% |
190HB |
27SiMn |
840σ N/mm2 |
805σsN/ mm2 |
7.5δs% |
230HB |
Honed tube size tolerance
ID size |
ID deviation (mm) |
|||
H7 |
H8 |
H9 |
H10 |
|
30 |
+0.021 0 |
+0.033 0 |
+0.052 0 |
+0.084 0 |
>30~50 |
+0.025 0 |
+0.039 0 |
+0.062 0 |
+0.100 0 |
>50~80 |
+0.030 0 |
+0.046 0 |
+0.074 0 |
+0.120 0 |
>80~120 |
+0.035 0 |
+0.054 0 |
+0.087 0 |
+0.140 0 |
>120~180 |
+0.040 0
|
+0.063 0 |
+0.100 0 |
+0.160 0 |
>180~250 |
+0.046 0 |
+0.072 0 |
+0.115 0 |
+0.185 0 |
>250~315 |
+0.052 0 |
+0.081 0 |
+0.130 0 |
+0.210 0 |
>315~400 |
+0.0527 0 |
+0.089 0 |
+0.140 0 |
+0.230 0 |
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