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Quick Details
Specifications
Cold drawn St45 20# Mild Steel Tubing Honing Steel Pipes For Hydraulic Cylinder , DIN 2391 EN 10305
Quick Detail:
Products: Hydraulic cylinder tubes / Precision steel tube
Standard: DIN 2391 / EN 10305 /GB8713-88 / GB/T3639-2000
Grade: St52 / E355 / St45 /
SAE1026 / 20# / 27SiMn
SIZE:(mm)
OD: 45mm ~ 500mm
WT: 3mm ~
50mm
Description:
1. Variety
Processing form | I.D.mm | Length | Straightness | I.D.tolerance | I.D.Roughness(RA) |
Cold-rolled | 30-100 | ≤24M |
0.3-1.0/1000 | H8-H10 | 0.4-1.6um |
Cold-drawn | 30-250 | ≤24M | H8-H10 | 0.8-1.6um | |
Hone | 40-500 | ≤24M | H8-H9 | 0.4-0.8um | |
SRB | 50-250 | ≤24M | H8 | 0.1-0.4um |
2. Material Specification and Ref. Document
ST52,BK+S OR NBK,DIN2391
OD:45-50mm WT:3-50mm
3. Chemical Compisition (%)
Steel grade | Chemical composition,% | |||||
C | Si | Mn | P | S | Cr | |
≤ | ||||||
St45 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 |
ST52(E355) | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | 0.25 |
SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.040 | 0.050 | / |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | 0.300 |
20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.250 |
4. Mechanical Properties
Delivery condition | BK Cold finished(hard) | BKS Cold drawn and stress-relieved | |||
Steel grade | Rm Mpa | Elongation | Rm MPa | ReH MPa | Elonggation |
ST45 | ≥550 | ≥5 | ≥520 | ≥375 | ≥15 |
ST52(E355) | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 |
SAE1026 | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 |
16Mn | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 |
20# | ≥550 | ≥8 | ≥520 | ≥375 | ≥15 |
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
7. Tolerances of Inner Dia.
Size of I.D | I.D Tolerance | Tolerance of wall thickness | ||
H8 | H9 | H10 |
±7.5% >210mm ±10% | |
30 | +0.0330 | +0.0520 | +0.0840 | |
>30-50 | +0.0390 | +0.0620 | +0.1000 | |
>50-80 | +0.0460 | +0.0740 | +0.1200 | |
>80-120 | +0.0540 | +0.0870 | +0.1400 | |
>120-180 | +0.0630 | +0.1000 | +0.1600 | |
>180-250 | +0.0720 | +0.1150 | +0.1850 | |
>250-315 | +0.0810 | +0.1300 | +0.2100 | |
8. Tolerance on Outer Dia.
≤ Dia 40 +/-0.2 mm
≥ Dia 40 ≤ Dia 100 +/-0.3mm
≥ Dia 100 +/-0.5mm
9. Appearance
Tube shall have a smooth internal and external surface consistent with cold working process, tube inner surface should be free from rust, scratches and other surface irregularities.
10. Scope
Hydaulic cylinder tube for swivel crane, injection machine and construction machine application
Applications:
Used in hydraulic system,nested card connector (pipe joints) with matching,,automobile and in the occasion where the high precision,brightness,cleanness and mechanical properties of the tube are required.