

Steel Grade | ||||||
C | Si | Mn | P | S | Al | |
≤ | ≥ | |||||
10#/1010 | 0.07-0.13 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | / |
20#/1020 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | / |
ST35/E235 | <= 0.17 | 0.35 | >=0.04 | 0.025 | 0.025 | / |
ST45 | <= 0.21 | <= 0.35 | >=0.04 | 0.025 | 0.025 | / |
45#/ 1045/S45C | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | / |
Q345B | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | / |
SKTM13C | ≤0.25 | ≤0.35 | 0.3-0.9 | 0.04 | 0.04 | / |
ST52/E355 | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | / |
ID tolerance can minimized to +/-0.02mm, OD+/-0.05mm
ID: 3- 250mm
Hydraulic Cylinder Honing Tube | ||||||
Inside Dia (mm) | ID Tolerance (mm) | WT Tolerance (mm) | ||||
H7 | H8 | H9 | H10 | |||
≤30 | +0.021/0 | +0.033/0 | +0.052/0 | +0.084/0 | ±7.5% >210mm ±10% | |
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 |
1. For Vehicle (Automotive, locomotive, Construction Machinery like Concrete pump and others)
Power steering system, Shock absorber, vibration damper , engine parts and others
2. Hydraulic cylinder, Industry Jacks
3. Fitness equipment,motor casings and auto parts.
Other precision surface required devises

by boxes or bundles
Chewit International
1. who are we?
We are based in Jiangsu, China, start from 2010,sell to Eastern Asia(20.00%),Mid East(20.00%),Eastern Europe(15.00%),Southeast Asia(15.00%),Northern Europe(10.00%),Domestic Market(10.00%),South America(5.00%),Western Europe(5.00%),South Asia(0.00%),North America(0.00%),Oceania(0.00%),Southern Europe(0.00%),Central America(0.00%),Africa(0.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Steel Pipe, Seamless Pipe, Hydraulic Oil Tube, Precision Tube, Stainless Steel Tube
4. why should you buy from us not from other suppliers?
Production: Advanced production line and drawing with special oil to make the surface in best condition. Lower roughness and good mechanical performance. Inspection before delivery: Professional team for inspection and randomly check
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU;
Accepted Payment Currency:USD,EUR,HKD,CNY;
Accepted Payment Type: T/T,L/C,MoneyGram;
Language Spoken:English,Chinese,Spanish,Japanese