Mild sch 40 seamless black steel pipe DIN1629 ST52
USD $0.9 - $1.3 /Kilogram
Min.Order:5000 Kilograms
Mild sch 40 seamless black steel pipe DIN1629 ST52
1 OD32-500mm W.T.3.5-80mm 2 ISO certificated DIN2391 En10305 3 Straightness:0.3~1mm/m 4 Inside Roughness:0.4~0.8um
steel pipes for hydraulic use
Material: C20, CK45, etc. also ST52 if given enough time. our products are widely used in hydraulic industry and is very popular both home and abroad.
And we can also make our products according to the customers' needs.
Variety
Processing
| Cylinder diameter | Length /mm | Straightness | Size accuracy | Wall thickness/mm | Inner bore roughness |
Cold-drawn | ID30~OD250 | ≤13M | 0.3~1.0mm/m | H9-H11 | ±8% | 0.8~1.6um |
Honed tube | ID50~OD325 | ≤10M | 0.3~1.0mm/m | H7-H9 | ±8% | 0.4~0.8um |
Mechanics performance
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 |
Dimension 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 |
Production Process:
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