Yield point 440 N/mm² class heavy-thick steel plates for High heat input welding for large container ships

1. Features

HAZ toughness can be secured even with high heat input welding such as one-pass vertical welding in thick high-strength steel plates used for large container ships, contributing to a significant reduction in welding costs.

2. Major corresponding standards

NK classification:: KE40, KD40, KA40 (also corresponding to other classification standards)

3. Applications

Heavy-thick high-strength steel used for large container ships with sheer strakes, longitudinal bulkheads, etc.

4. Typical characteristics

Classification	Thickness mm	Main chemical compositions (mass%)				Ceq %	Base metal properties			Welded joint properties
Classification	Thickness mm	C	Mn	Nb	Ti	Ceq %	YS N/mm²	TS N/mm²	vE-40 J	Welding method	Welding heat input kJ/mm	TS N/mm²	vE-201) J	CTOD value (0°C) 2) mm
Developed steel plate	60	0.08	1.54	0.018	0.011	0.34	411	533	314	1 pass SEGARC	35.7	537	207/168	0.68/0.57
Conventional steel plate	50	0.12	1.52	0.019	0.012	0.38	449	553	238	1 pass SEGARC	35.2	556	85/15	0.17/0.08
NK specification values							≧390	≧510	≧41	−	−	≧510	≧41	−

1) Sampling point: 1 mm above the surface; Notch position: bond to bond + 1 mm; Characteristic values: average value / minimum value
2) Three-point bending CTOD test (BS7488)

Reference material

Characteristics of Brittle Crack Arrest Steel Plate for Large Heat-input Welding for Large Container Ships

Contacts

Plate Products (Shipbuilding) Request for Business or Catalog Ship Plant Sales Section Plate Products Sales Department Iron & Steel Business Kobe Steel, Ltd.: TEL: +81-3-5739-6172 (Tokyo)
TEL: +81-6-6206-6229 (Osaka)

Technical Matters Plate Products Marketing & Technical Services Iron & Steel Business Kobe Steel, Ltd.: TEL: +81-6-6206-6612 (Osaka)

Inquiry

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Yield point 440 N/mm2 class heavy-thick steel plates for High heat input welding for large container ships