why OD polished? It is better for painting.
Name : honed tubes, honing pipe, hydraulic cylinder tubes, pneumatic cylinder tubes, honed pipe, honing tube, seamless honed steel tube, precision tubes, cold drawn honed tubes, skived tubes, skived and roller burnished tubes, skived pipes, SRB tube, SRB pipe, hydraulic SRB tube, hydraulic cylinder skived tubes
Popular standard and steel grade:
EN10305-1 | E355 E235 E410 E470 C45E |
DIN2391-1 | ST52 ST45 ST52.3 |
ASTM A519 | SAE1020 SAE1045 SAE1026 |
GB/T | 20# 45# 16Mn Q345B Q345D Q345E 42CrMo 27SiMn |
Application: hydraulic cylinder, pneumatic cylinder,Jack, cylinder barrel
Manufacture Method: cold drawn, cold rolled, Hot rolled+Deep Hole Boring
Heat Treating Method/Delivery Condition:
BK | BKS | GBK | NBK | Q+T |
+C | +SR | +A | +N | Q+T |
Cold drawn | Stress relieved | Annealed | Normalized | QUENCHED + TEMPERED |
Hydraulic & pneumatic tube size and parameters:
Manufacture method | Cylinder ID （mm） | Length （m） | Straightness （mm/m） | Tolerance on ID | Tolerance on WT | Roughness （μm） |
Cold drawn | 40-420 | ≤16M | 0.2-0.5 | Depends on requirement | ±8% | 0.8-1.6 |
Cold rolled | 30-100 | ≥14M | 0.2-0.5 | Depends on requirement | ±5% | 0.8-1.2 |
cold drawn- honed | 40-420 | 14M | 0.2-0.3 | H8-H9 | ±8% | 0.2-0.8 |
Cold drawn-skived & burnished | 40-300 | 9M | 0.2-0.3 | H8-H9 | ±8% | ≤0.4 |
Deep hole boring- honed | 50-1000 | 12M | 0.2-0.3 | H8-H9 | ±8% | ≤0.8 |
Deep hole boring- skived | 50-300 | 9M | 0.2-0.3 | H8-H9 | ±8% | ≤0.4 |
Mechanical property:
Final Supply Condition | Cold finished （Hard）（BK） | Cold drawn and stress-relieved （BK+S or + SR） | Hardness HB | |||
Parameters | T.S obN/mm2 | Elongation δ5% | T.S obN/mm2 | Y.S OsN/mm2 | Elongation δ5% | |
20# (A106B, ST45, E255) | ≧550 | ≧8 | ≧520 | ≧375 | ≧12 | 175 |
45#(CK45) | ≧650 | ≧5 | ≧600 | ≧500 | ≧10 | 190 |
Q345B(ST52, E355) | ≧640 | ≧5 | ≧600 | ≧520 | ≧15 | 190 |
25Mn | ≧640 | ≧5 | ≧600 | ≧510 | ≧15 | 195 |
27SiMn | ≧840 | ≧5 | ≧720 | ≧600 | ≧10 | 210 |
Chemical Properties:
Material | C% | Mn% | Si% | S% | P% |
20# | 0.17-0.23 | 0.35-0.65 | 0.17-0.37 | ≤0.035 | ≤0.035 |
ST45 | ≤0.21 | ≥0.4 | ≤0.35 | ≤0.025 | ≤0.025 |
E255 | ≤0.21 | 0.4-1.1 | ≤0.35 | ≤0.025 | ≤0.025 |
45# | 0.42-0.50 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 |
Q345B | ≤0.20 | ≤1.70 | ≤0.50 | ≤0.035 | ≤0.035 |
E355 | ≤0.22 | ≤1.6 | ≤0.55 | ≤0.025 | ≤0.025 |
ST52 | ≤0.22 | ≤1.6 | ≤0.55 | ≤0.04 | ≤0.04 |
25Mn | 0.22-0.29 | 0.70-1.0 | 0.17-0.37 | ≤0.035 | ≤0.035 |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.035 | ≤0.035 |
Tolerance on ID:
ID | Tolerance for ID (μm) | |||
H7 | H8 | H9 | H10 | |
30 | +21 0 | +33 0 | +52 0 | +84 0 |
>30-50 | +25 0 | +39 0 | +62 0 | +100 0 |
>50-80 | +30 0 | +46 0 | +74 0 | +120 0 |
>80-120 | + 35 0 | + 54 0 | +87 0 | +140 0 |
>120-180 | +40 0 | +63 0 | +100 0 | +160 0 |
>180-250 | +46 0 | +72 0 | +115 0 | +185 0 |
>250-315 | +52 0 | +81 0 | +140 0 | +210 0 |
>315-400 | +57 0 | +89 0 | +170 0 | +230 0 |
Part of size list (ID*OD)
40*50 | 100*127 | 240*273 | ||
40*55 | 110*130 | 250*266 | ||
50*60 | 120*140 | 250*280 | ||
50*63 | 120*145 | 250*300 | ||
60*70 | 125*140 | 280*323 | ||
60*73 | 125*145 | 280*325 | ||
63*73 | 140*165 | 300*320 | ||
63*76 | 140*168 | 300*356 | ||
70*80 | 150*180 | 320*340 | ||
70*82 | 160*184 | 320*356 | ||
70*85 | 160*194 | 320*370 | ||
80*90 | 170*200 | 350*370 | ||
80*92 | 180*210 | 400*420 | ||
80*95 | 200*216 | |||
80*100 | 200*220 | |||
90*102 | 200*232 | |||
90*105 | 200*245 | |||
100*114 | 220*250 | |||
100*121 | 220*273 |
Wuxi Baiheng started in the steel pipe industry as early as 2001 in Wuxi city. We are not only manufacturer, but also exporter. We know all customers want to do comparison buying, we will do this for you.
