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DNV High Grade Certification for random length bars in 18CrNiMo7-6, ISO-B quality
Discs are sawn from Random length bars and Buderus Edelstahl ISO-B technology ensures consistent properties as required by DNV high grade, for rounds up to Dia 1450mm. This is confirmed by certificate issued by Det Norske Veritas.
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Download PDF File |
Grade 1.6587
DNV High Grade |
| Analyse (Mass %) |
| C |
Si |
MN |
P |
S |
Cr |
Ni0 |
Mo |
| 0,15 - 0,19 |
max. 0,4 |
0,5 - 0,6 |
max. 0,015 |
max. 0,005 |
1,5 - 1,8 |
1,4 - 1,7 |
0,25 - 0,35 |
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Designation:
(Mass%) acc. to EN 10084
ME quality acc. to ISO 6336 5
DIN 3990 5
ZF1A
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Delivered Condition:
Heat treatment:
< 500 mm: annealed
> 500 mm: pre-hardened and tempered |
Hardness: max. 210 HB
Quality: ISO-B, High Grade
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High Cleanliness:
acc. to DIN 50602, k 4: max. 2
acc. to ISO 4967: |
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| A |
B |
C |
D |
DS |
| thin |
thick |
thin |
thick |
thin |
thick |
thin |
thick |
thin |
max |
| 1.0 |
1.0 |
0.5 |
0.5 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
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Sulphur content: max. 0.005%
Phosphorous content: max. 0,015%
Oxygene content: max. 25 ppm
Largely isotropic material properties |
Hardenability HH EN 10084
Ultra sonic tested
Incl. mill.-cert . acc. to
EN 10204-3.1 |
High Availability:
| Recommended heat treatment: |
| Softening |
650 - 700 °C |
| Carburising |
880 - 980 °C |
| Core hardening |
830 - 870 °C |
| Case hardening |
780 - 820 °C |
| Process annealing |
630 - 650 °C |
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