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Classification:
EN ISO 3580-A
E Mo B 42 H5
AWS A5.5 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
Metal recovery:
110%
Welding positions:
Welding current:
DC+
Redrying temperature:
350 °C, 2h
Chemical composition, wt.%
Mechanical properties
Typical
Yield strength, Rp0.2%: 480 MPa**
Tensile Strength, Rm: 590 MPa**
Elongation, A5 24%**
Impact energy, CV:
-20 °C
•
100 J**
Hydrogen content / 100 g weld metal
≤ 5 ml
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