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Electrodes for Creep Resisting Steels

CROMOTHERME-2(RTE)

AWS: SFA 5.5 E9018-B3 EN ISO CODE: 3580-A E CrMo2 B 3 2 H5

Weld metal having strict control on S, P, As, Sn & Sb will improve the subzero impact property and resists temper embrittlement. Weld metal retains its mechanical properties after prolonged heat treatments. Ideal for welding steam generating equipments and reactor vessels. The weld metal displays excellent tensile strength and creep resistance. Specially applicable wherever temper embrittlement resistance is required.

Precaution

1. Ensure the electrodes are dry. Re-dry the electrodes at 250-300 C for one hour.

2. Use short arc, low current and stringer beads.

Approvals
    CE
CHEMICAL COMPOSITION OF ALL WELD METAL (%)


Element
CMnSiCrMoSbAsSPSnAlVNiCuTi
Percent
0.060.50.22..41.00.0010.00350.0070.0070.0035
0.0020.010.100.020.002


MECHANICAL PROPERTIES OF ALL WELD METAL


-YSUTSElongation
CVN Impact Strength (J)
Hardness
-(MPa)
(MPa)
(L= 5d)%
at Minus 40°C
(VPN)
SR at 690°C/ 1 hr
55064022
--
SR at 690°C/ 6 hr
4555602490180
SR at 690°C/ 40 hr
42553526100-

DIFFUSIBLE HYDROGEN CONTENT: 4 ml/100 gms of weld metal (max.).

X-FACTOR: (10P + 5Sb + 4Sn + As) / 100 ≤ 15.0 (elements in ppm)

J-FACTOR: (%Si + %Mn) x (%P + %Sn) 10 ≤ 125

PE: (C + Mn + Mo +Cr/3 + Si/4) + 3.5(10P + 5Sb + 4Sn + As) < 3

STEP COOLING REQUIREMENT: CvTr54 + 2.5 Ä CvTr54SC < 10°C

(Where CvTr54: Transition temperature at absorbed energy of 54J of heat treated 

specimen.  CvTr54SC: Shift in 54J transition temperature due to step cooling)



CURRENT AND PACKING DATA: DC (+)


Size (mm)
6.3x4505x4504x350
3.15x350
2.5x350
Current Range (Amps)
250-300200-250140-180
100-130
70-100
Qty. (Pcs./Carton)
253555
75100