

Classification:

EN ISO 3580-A

AWS A5.5

E Mo B 42 H5

E 7018-A1

Description:

P 81CR is a basic-coated, low hydrogen electrode which deposits a 0.5% Mo type weld metal. It is

primarily intended for welding similar composition steels, used where creep rupture strength and

ductility at service temperatures up to 550°C are required e.g. EN 16Mo3 and ASTM A335 Grade P1.

The Mo content confers some resistance to hydrogen attack in chemical process plant applications. P

81CR is also suitable for ordinary C-Mn steels when higher tensile strength weld metal is required.

Preheat and interpass temperature of 100-150 °C is recommended. Post-weld heat treat at 620 °C.

Coating type:

Basic

Mechanical properties

Metal recovery:

110%

Yield strength, Rp0.2%:

Tensile Strength, Rm:

Elongation, A5

Impact energy, CV:

Typical

Welding positions:



480 MPa**

590 MPa**

24%**

-20 °C • 100 J**

Hydrogen content / 100 g weld metal

≤ 5 ml

Welding current:

DC+

Redrying temperature:

350 °C, 2h

Chemical composition, wt.%

























Product data

  





















2,5

350

71812500

65-100

22

0,72

71

0,8

3,2

350

71813200

95-150

23

0,73

37

1,4

4,0

350

71814000

130-200

24

0,73

19

1,8

5,0

450

71815000

160-265

25

0,73

12

2,6

51