Specimen Test of Large-Heat-Input Fusion Welding Method for Use of SM570TMCP

Table 2

Test types of large-heat-input welding.

Test item	Test method	Specimen; Quantity	Judgment criteria
Visual inspection	Visual	—	Good bead appearance on surface/no undercut nor blow hole
Nondestructive examination	UT	—	There is no internal crack (high temperature crack and low temperature crack) on welded metal and HAZ part, impurity, nor discontinuity
Cutting inspection	Architectural work standard specification	1	(i) Roughness on cut surface: refer to 4.2; (ii) Cut deformation: refer to 4.3
Sectional tensile test	KS B 0833	2	Tensile strength will be above the specified value of base metal.
Side face bending test	KS B 0832	4	Cracked length on welded part when bent in 180° will be below the value required by KS B 0832.
Impact test (0, −5, −20°C)
Heat affected part (HAZ)	KS B 0810	3	The value of welded metal will be above the specified value of base metal.
Welded metal part (WM)		3	Target steel type	Test temp.	Criteria
Weld metal part FL		3	SM490TMC	0°C	27 J or above
			SM570TMC	−5°C	47 J or above
Macro/hardness test	—	1	There is no crack nor deficiency on welded metal part and HAZ part. Hardness on welded metal part and HAZ part will be above the value required by KS/architectural work standard specification.