CROMOTHERME-91 - E9015-B91
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Electrodes for Creep Resisting Steels

CROMOTHERME-91

AWS: SFA 5.5 E9015-B91 EN ISO CODE: 3580-A E CrMo91 B 4 2

Cromotherme-91 is 9Cr - 1Mo, non-synthetic, low hydrogen electrode modified with Aluminium, Niobium, Vanadium and Nitrogen designed to provide improved creep strength, toughness, fatigue life, oxidation and corrosion resistance at elevated temperatures. It is designed to weld the materials in power plant and refineries. Following are some of the steels that can be welded with this electrode.

* Plate: A 387 Gr. 91  * Pipes: A 335 - P91  * Tubes: A 213 - T91

Precaution

1. Ensure the electrodes are dry. Re-dry the electrodes at 300 C for 2 hours.

2. Use short arc, minimize heat input.

Approvals
    CE
    BHEL
    CIB-MP
    Reliance
    Adani Infra
CHEMICAL COMPOSITION OF ALL WELD METAL (%)


Element
CMnSiPSCrNiMoVNbNCuAi
Percent
0.100.650.250.0070.0089.000.0451.000.200.060.030.020.02


MECHANICAL PROPERTIES OF ALL WELD METAL


UTSYSElongation
CVN Impact Strength (J)
Hardness
(MPa)
(MPa)
(L= 5d)%
at 20°C
HV
6905801960
205

CREEP PROPERTIES: Successfully completed 40119 Hours at 600oC/100 MPa.

DIFFUSIBLE HYDROGEN CONTENT: 4 ml/100 gms of weld metal Max. (When measured according to AWS-4.3-86 Specification)

CURRENT AND PACKING DATA: DC (+)


Size (mm)
5x4504x350
3.15x350
2.5x350
Current Range (Amps)
170-230130-170
80-120
60-80
Qty. (Pcs./Carton)
3050
75100


Electrodes for Creep Resisting Steels

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