Detailed Product Description
| Material: | ST37.4,ST44.4,ST52.4 | Standard: | DIN1630 |
| Outer Diameter: | 4 To 60mm | Surface Treatment: | Galvanized |
| Technique: | Precision Cold Drawn Seamless Carbon Steel Tube | Thickness: | 0.5 To 7mm |
High Precision Galvanized Steel Tubing DIN1630 , OD 4mm - 60mm TH 0.5mm - 7m
Quick Detail:
DIN1630 Precision zinc coated tube ST37.4 OD8x1.5x4000
Good antirust effect,zinc distributed on the surface
No deformation after cold bending,no crack after flaring and flattening.
Description:
Synopsis of Process Routing: DIN highly accurate cold drawn bright seamless steel tube is used as the tube to be galvanized, the outer wall is electroplated, caps are covered at two ends of tube to prevent from the dust.
Main Features: Different color of zinc such as white, yellow, army-green, black is evenly distributed in the surface of the tube, good brightness and antirust and antisepsis could improve after zinc coated.
Applications:
Automotive,military,railway industry,with high requirement of the tube's brightness, cleanness,antirust,and antisepsis.
Specifications:
Size:OD4mm-60mm,TH0.5mm-7mm
Standard:DIN1630
Material: ST37.4,ST44.4,ST52.4
Delivery State:NBK+Black phosphate.
| Galvanized tube category and related standard | |||
| Galvanized tube category | Related Standard | Zinc coating thickness | Salt spray test |
| Gr3+ Galvanized tube with blue and white zinc | ASTM B633-07 (Type III,SC 1/2/3/4) | 5-25um | 24--72 hours without white rust;48--168 hours without red rust |
| Gr3+ Galvanized tube with color zinc | ASTM B633-07 (Type II,SC 1/2/3/4) | 5-25um | 48--96 hours without white rust;48--240 hours without red rust |
| Gr6+ Galvanized tube with color zinc | ASTM B633-98 (Type II,SC 1/2/3/4) | 5-25um | 24--96 hours without white rust;48--124 hours without red rust |
Chemical composition(cast analysis)a | ||||||
Steel grade | % by mass | |||||
Steel name | Steel number | C | Si | Mn | P | S |
max. | max. | max. | max. | |||
ST37.4 | 1.0255 | 0.17 | 0.35 | ≥0.35 | 0.025 | 0.025 |
ST44.4 | 1.0257 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
ST52.4 | 1.0581 | 0.22 | 0.35 | ≤1.60 | 0.025 | 0.025 |
Mechanical properties at room temperature | ||||
Steel grade | Minimum values for the delivery condition | |||
Steel name | Steel number | |||
Rm(Mpa) | Re(Mpa) | A(%) | ||
ST37.4 | 1.0255 | 235 | 350-480 | 25 |
ST44.4 | 1.0257 | 275 | 420-550 | 21 |
ST52.4 | 1.0581 | 355 | 500-650 | 21 |
Competitive Advantage:
Flattening test,Flaring test,tensile strength test,hydraulic pressure test are made for each batch of hydraulic tubing.
Internal surface with high cleaness and roughness.
We passed TS16949 certificate.
Main Customer:Contitech,Benteler.
We have to cooperate with Volkswagen.
We also have been reviewed by BMW.
