Norwegian Reinforcement Drawings

[Ussuri]

I have a norwegian reinforcement drawing from 1975 and I am trying to get an understanding on what a couple of things mean:

Kontrollklasse: Utivdet
Betongkvalitet: C45
Stalkvalitet: Ks40

A Norwegian friend translated it for me to mean:

Control Class : Expansion
Concrete Quality: C45
Steel Quality: Ks40.

My query is more related to norwegian practice.

1] C45 in the UK means a 28 day cube strength of 45 MPa. The europeans tend to use cylinder strength instead of cube strength. Does this mean in this instance C45 is a cylinder strength?

2] Does anyone know what Ks40 means in terms of rebar grade. 400 MPa yield perhaps?

Any help would be appreciated.

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