Our company based on market needs development and production of ultra-high precision steel tubes, mainly cold drawn, cold rolling, honing processing methods, with high precision, stable quality, good price and so on. The major products are: 一、A variety of standard non-standard ultra-precision hydraulic and pneumatic cylinder:
Inner diameter specifications: Φ30 ~ Φ400mm thickness: 2.5 ~ 25mm
Material: 20 #, 45 #, 16Mn, 37Mn5, 27SiMn
Standard: GB8713-88 hydraulic and pneumatic cylinder with precision diameter seamless steel tubes, GB3639-83 drawn or cold rolled precision seamless steel pipe
1、Variety in the following table: |
Processing form |
Bore (mm) |
Length |
Straightness (mm) |
Dimensional accuracy |
Bore roughness (μm) |
Cold rolling |
30—100 |
≤12m |
0.3~1.0/1000 |
H8~H10 |
0.4~1.6 |
Cold drawn |
30—400 |
≤10m |
0.8~1.6 |
Honing |
32—500 |
≤12m |
H8~H9 |
0.4~0.8 |
|
2、Cold-drawn and cold-rolled precision steel mechanical properties in the following table: |
Cards
Number |
Delivery status |
Cold processing
/ Hard (Y) |
Cold processing
/ Soft (R) |
Stress Relief
Annealing (T) |
σb MPa |
δ5 % |
σb MPa |
δ5 % |
σb MPa |
δ5 % |
10 |
420 |
6 |
380 |
10 |
340 |
12 |
20 |
520 |
5 |
460 |
8 |
440 |
10 |
30 |
600 |
4 |
560 |
6 |
530 |
8 |
45 |
660 |
4 |
640 |
5 |
620 |
7 |
|
3、Cold-drawn and cold-rolled precision steel dimensional tolerances: |
Inner diameter dimension (mm) |
Inner diameter deviation (mm) |
Thickness deviation |
上差 H8 下差 |
上差 H9 下差 |
上差 H10 下差 |
30 |
+0.033 0 |
+0.052 0 |
+0.084 0 |
±5% |
>30—50 |
+0.039 0 |
+0.062 0 |
+0.100 0 |
>50—80 |
+0.046 0 |
+0.074 0 |
+0.120 0 |
>80—120 |
+0.054 0 |
+0.087 0 |
+0.140 0 |
>120—180 |
+0.064 0 |
+0.100 0 |
+0.160 0 |
>180—250 |
+0.072 0 |
+0.115 0 |
+0.185 0 |
>250—315 |
+0.081 0 |
+0.130 0 |
+0.210 0 |
>315—400 |
+0.089 0 |
+0.140 0 |
+0.230 0 |
|
Precision pump barrel oil industry pipe supply specifications in the following table: |
Cylinder Specifications |
Implementation of standards |
Material |
Inner roundness (mm) |
Thickness deviation (mm) |
Roughness (μm) |
The inner surface |
The outer surface |
1 1/4″ |
API SPEC11AX |
20/45 |
0.03 |
≤0.3 |
Ra≤0.4~1.6 |
Ra≤3.2 |
1 1/2″ |
20/45 |
1 3/4″ |
20/45 |
2 1/4″ |
20/45 |
2 3/4″ |
20/45 |
0.035 |
3 1/4″ |
20/45 |
3 3/4″ |
20/45 |
|