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Electrodes for Creep Resisting Steels

CROMOTHERME-1(RTE)

AWS: SFA 5.5 E8018-B2

EN ISO CODE: 3580-A E CrMo1 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.

Approvals

TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL

Element	C	Mn	Si	Cr	Mo	Sb	As	S	P	Sn	Cu	Ni	Ti	V
Percent	0.06	0.60	0.25	1.30	0.55	0.001	0.0035	0.009	0.009	0.003	0.018	0.14	0.002	0.008

TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL

	YS	UTS	Elongation	CVN Impact Strength (J)	Hardness
	(MPa)	(MPa)	(L= 5d)%	at Minus 33°C	(VPN)
SR at 690°C/ 1 hr	500	580	24	-	-
SR at 690°C/ 2.5 hrs	450	540	28	150	200
SR at 690°C/ 16 hrs	390	520	30	170	-

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

X-FACTOR : (10P + 5Sb + 4Sn + As)/100 ≤ 12.0 (Elements in ppm)

4 J-FACTOR: (Si + Mn) x (P + Sn) 10^4 ≤ 125

STEP COOLING REQUIREMENT: CvTr40 +2.5 Δ CvTr40Sc < 10°C (Where CvTr40: Transition temperature at absorbed energy of 40J of heat treated specimen. Δ CvTr40Sc: Shift in 40J transition temperature due to step cooling)

CURRENT AND PACKING DATA: AC / DC(+)

Size (mm)

Dia x Length

6.3x450

5x450

4x350

3.15x350

2.5x350

Current Range (Amps)

250-300

200-250

140-180