Delivery Time:30 DAYS
Certification:TS 16949 ISO 9000
DIN1630 ST37.4 Precision Black Phosphated Hydraulic Tube For Automobile
Quick Detail:
Precision hydraulic steel tube DIN1630-ST37.4 NBK OD10xTH1.5
Description:
The steel grades of raw material used in our company are mainly ST35, ST37.4(10#), ST45 (20#), ST55 (35#), Ck45 (45#), ST52.4 (16Mn) etc. produced by Shanghai Baosteel Group.
Synopsis of Process Routing: Cold drawn and bright NBK seamless steel tube is used as the tube to be phosphated. The phosphated is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micro pore on the film to prevent from the rust. The caps are covered at two ends of tube to prevent from the dust.
Main Features: color of steel tube: bright black. Color is homogeneously distributed on the tube surface. The tube has good property of antirust.
Applications:
Used in hydraulic system,including automotive Hydraulic power steering system, the clutch system, braking system, engine high pressure oil pipe, excavator hydraulic oil pipe,nested card connector (pipe joints) with matching,shippment industry.
Specifications:
Size:OD4mm-60mm,TH0.5mm-7mm
Standard:DIN1630
Material: ST37.4,ST44.4,ST52.4
Delivery State:NBK+Black phosphate.
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Chemical composition(cast analysis)a |
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Steel grade |
% by mass |
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Steel name |
Steel number |
C |
Si |
Mn |
P |
S |
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max. |
max. |
max. |
max. |
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ST37.4 |
1.0255 |
0.17 |
0.35 |
≥0.35 |
0.025 |
0.025 |
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ST44.4 |
1.0257 |
0.21 |
0.35 |
≥0.40 |
0.025 |
0.025 |
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ST52.4 |
1.0581 |
0.22 |
0.35 |
≤1.60 |
0.025 |
0.025 |
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Mechanical properties at room temperature |
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Steel grade |
Minimum values for the delivery condition |
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Steel name |
Steel number |
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Rm(Mpa) |
Re(Mpa) |
A(%) |
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ST37.4 |
1.0255 |
235 |
350-480 |
25 |
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ST44.4 |
1.0257 |
275 |
420-550 |
21 |
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ST52.4 |
1.0581 |
355 |
500-650 |
21 |
Competitive Advantage:
Certificate: TS 16949 certificate
Our customer: Contitech,Benteler
We have to cooperate with Volkswagen
We also were reviewed by BMW.
