EN 10025 K2 / EN 10025 j2? 1

[bmoorthy]

Hello All

I came across this standard material BS En 10025. I know the "2" which follows J or K signifies the impact temperature(-20 Deg C). What does the J or K signify?

 

[Ussuri]

The principal mechanical property designations are as follows

JR - Longitudinal charpy V notch impacts 27J @ room temp
JO - Longitudinal charpy V notch impacts 27J @ 0°C
J2 - Longitudinal charpy V notch impacts 27J @ -20°C
K2 - Longitudinal charpy V notch impacts 27J @ -40°C
G1 - Rimming Steel
G2 - Rimming steel not permitted
G3 - Normalised or normalised rolled
G4 - Supply condition at manufacturers discretion
M - Thermomechanically rolled
L - low temperature impacts @ -50°C
W - Weather resistant grades
C - Cold forming grade
P - Piling grade