St45 20# Mild Cold Drawn Steel Tube Round 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
A5(%) | Rm MPa | ReH MPa | Elonggation
A5(%) |
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.
Product Photo
Factroy Pictures
Pipe & Tube Processing
Steel Pipe & Tube Application
Packaging and Shipping
Certificates
FAQ
Q1: ARE YOU FACTORY OR TRADER?
A1: Wuxi Sylaith Special Steel Co.,Ltd is a manufacturer of steel
pipe and tube since 2010.
We've gained our Export Right and become an integrated company of
industry and trade in order to satisfy buyer's multi-request on
different material and products.
Q2: WHICH MATERIAL/PRODUCTS YOU CAN PROVIDE?
A2: Seamless Stainless Steel Pipe / Tube, Seamless Carbon Stainless
Steel Pipe /Tube,Galvanized Steel Tube witn any Shape and Welded
pipes can also be available.
Q3: HOW TO GET A SAMPLE?
A3: FREE samples are available for your checking and testing. And
to get free samples, you need to send us you detailed receiving
address (including post code) and your DHL/FedEx/UPS account for
collecting samples, courier cost will be paid in your side.
Q4:CAN YOU PRODUCE THE PRODUCTS ACCORDING TO MY OWN DRAWINGS?
A4: Yes, we can produce the products according to your drawings
that will be most satisfy you.
Q5: HOW TO VISIT YOUR FACTORY?
A5: Most of the main cities have flights to Shanghai; you can take
flight to Shanghai Putong/Hongqiao International Airport.
If you come from Hongkong, it will take 2 hours by flight (every
day 5 flight around noon time).
