Seamless steel tube for hydraulic and pneumatic cylinder use
Mechanical properties
Steel grade | Cold finished (hard) BK | cold drawn and stress-relieved | |||
T.S bN/M | elongation 5% | T.S bN/M | Y.S sN/M | elongation 5% | |
20# | ≥550 | ≥8 | ≥520 | ≥375 | ≥10 |
45# | ≥640 | ≥5 | ≥600 | ≥520 | ≥10 |
16Mn | ≥640 | ≥5 | ≥600 | ≥520 | ≥15 |
25Mn | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 |
27SiMn | ≥840 | ≥5 | ≥800 | ≥720 | ≥10 |
Dimension tolerance
Size of I.D | I.D Tolerance | Tolerance of wall thickness | ||
H8 | H9 | H10 | ±5% | |
30 | +0.033 | +0.052 | +0.084 | |
>30-50 | +0.039 | +0.062 | +0.100 | |
>50-80 | +0.046 | +0.074 | +0.120 | |
>80-120 | +0.054 | +0.087 | +0.140 | |
>120-180 | +0.063 | +0.100 | +0.160 | |
>180-250 | +0.072 | +0.115 | +0.185 | |
>250-315 | +0.081 | +0.130 | +0.210 | |
>315-400 | +0.089 | +0.140 | +0.230 | |
Product description
Processing form | I.D | length | straightness | I.D tolerance | I.D Rounghness |
Cold-rolled | 30-100 | ≤12M | 0.3-1.0 | H8-H10 | 0.4-1.6 |
Cold-drawn | 30-250 | ≤12M | 0.3-1.0 | H8-H10 | 0.8-1.6 |
Hone | 40-500 | ≤12M | 1000 | H8-H10 | 0.4-0.8 |
SRB | 40-400 | ≤7M | 1000 | H8 | 0.1-0.4 |
