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