Cryotron



Standard:
Q/TDGG0040-2004--------- Companies Standard


Purpose:

Suitable for lowtemperature pressure vessel steel.


The main production steel grades:
09MnD
 

Mechanicalproperties:

Grade

Rm (MPa)

ReL (MPa)

A (%)

Impact Test

T ()

Kv ( J)

Q345C

470~630

≥345

≥21

0

≥34

Q345D

470~630

≥345

≥21

-20

≥34

Q345E

470~630

≥345

≥21

-40

≥34

09MnD

400~540

≥240

≥26

-40

≥47

09MnNiD

440~580

≥280

≥24

-70

≥47

 

Chemicalcomposition:

Grade

C

Si

Mn

P

S

V

09MnD

≤0.12

0.17~0.37

0.95~1.35

≤0.025

≤0.015

≤0.03