Table I Chemical composition of filler (mass%)

-		Si	Fe	Mn	Mg	Cr	Ti	Zr	Remarks
Filler	a	0.06	0.15	0.61	4.80	0.10	0.11	<0.01	Standard wire (5183)
	b	0.06	0.15	0.58	4.77	0.07	0.08	0.11	Zr addition
	c	0.03	0.05	0.59	4.73	0.07	0.10	0.13	High purity and Zr addition
	d	0.03	0.05	0.58	4.80	0.07	0.11	<0.01	High purity
	e	0.06	0.15	0.60	5.49	0.07	0.11	<0.01	High Mg

Table II Chemical composition of base metal and weld metal (mass%)

-		Si	Fe	Mn	Mg	Cr	Ti	Zr
Base Metal		0.08	0.19	0.64	4.82	0.06	0.01	0.00
Weld Metal	A	0.07	0.16	0.63	4.77	0.08	0.06	0.00
	B	0.07	0.16	0.62	4.77	0.07	0.05	0.05
	C	0.06	0.13	0.64	4.80	0.07	0.05	0.05
	D	0.06	0.13	0.62	4.72	0.06	0.05	0.00
	E	0.07	0.17	0.63	5.00	0.07	0.06	0.00

Table III Result of tensile test

-		-	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Reduction of Area (%)
Base metal		293K 77K 20K 4K	143 159 166 179	300 424 536 557	25.9 36.9 25.6 28.7	39.3 28.2 24.9 27.4
Weld metal	A	293K 77K 20K 4K	131 162 191 196	283 407 425 446	29.4 33.6 12.2 14.6	37.6 26.0 14.6 15.1
	B	293K 77K 20K 4K	130 164 - 196	283 408 - 422	29.2 35.7 - 12.3	38.2 26.1 - 13.6
	C	293K 77K 20K 4K	130 164 - 195	281 412 - 428	30.9 38.0 - 12.3	43.4 28.9 - 13.5
	D	293K 77K 20K 4K	128 162 190 193	280 409 424 438	29.5 38.0 14.3 13.4	43.8 29.0 15.5 14.7
	E	293K 77K 20K 4K	133 168 - 198	290 406 - 425	30.0 26.9 - 12.5	43.5 21.3 - 13.7

Table IV Result of Charpy impact test and JIC test

-		-	Absorbed Energy (J)	JIC (kPa*m)	KIC (MPa*(m)1/2)
Base metal		293K 77K 4K	33.3 22.7 20.8	54.6 71.2 25.8	65.3 79.3 47.6
Weld metal	A	293K 77K 4K	30.6 12.0 9.4	65.3 60.0 14.2	71.3 72.7 35.6
	B	293K 77K 4K	29.0 11.8 9.5	57.9 53.9 13.6	67.2 68.9 34.7
	C	293K 77K 4K	36.0 13.8 9.3	80.8 64.1 12.9	79.3 75.2 33.9
	D	293K 77K 4K	36.9 13.3 8.8	83.1 53.0 13.4	80.4 68.3 34.5
	E	293K 77K 4K	28.5 9.3 7.2	55.7 39.0 11.1	65.9 58.7 31.4