Application :Diesel(compression-ignition)engines
Produce method: shall be manufactured from unalloyed quality steel or an equivalent steel produced by a steel-making process that ensures a very homogeneous structure.The final reduction of the tube shall be followed by treatment to achieve the specified mechanical properties.
Characteristic:Precision,Smooth finish,Cleanliness,High mechanical properties.
Delivery condition: NBK/GBK.
Outside surface condition
0: No
1:Outside surface as processed, without any additional finish. Tubes annealed or normalized in a controlled atmosphere may be discoloured,but shall be free from loose scale.
2.Zinc electroplated with a coating layer thickness of 8μm minimum and an additional colourless chromatinga
3. Zinc electroplated with a coating layer thickness of 8μm minimum and an additional yellow chromating
4 ,5,6,7,8 Reserved for further application
9 As specified subject to agreement
A: Chromating as described in ISO2080 and ISO4520
Mechanical properties
Code | Tensile strength Rm N/mm2 Min | Proof strength Rp0.2 N/mm2 Min | Elongation A5 % | Hardness HV Max |
1 | 310 | 205 | 30 | 115 |
2 | 360 | 220 | 23 | 150 |
3 | 490 | 335 | 22 | 194 |
4 | 600 | 430 | 15 | 280 |
Note: The mechanical properties apply when the tubes is tested in accordance with ISO6507-1 and ISo6892-1 |
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