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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.


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

Designation:

(Mass%) acc. to EN 10084
ME quality acc. to ISO 6336 5
DIN 3990 5
ZF1A

Delivered Condition:

Heat treatment:

< 500 mm: annealed Hardness: max. 210 HB
> 500 mm: pre-hardened and tempered Quality: ISO-B, High Grade

High Cleanliness:

acc. to DIN 50602, k 4: max. 2

acc. to ISO 4967:

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
Sulphur content: max. 0.005% Hardenability HH EN 10084
Phosphorous content: max. 0,015% Ultra sonic tested
Oxygene content: max. 25 ppm Incl. mill.-cert . acc. to
Largely isotropic material properties 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