DIN standard HII Boiler and Pressure Vessel Steel Plate

The main difference between DIN standard HII and DIN standard HI boiler and pressure vessel steel plates is their chemical composition. While both specifications are used for high-temperature service applications and have similar mechanical properties, DIN standard HII steel plate contains more silicon than DIN standard HI steel plate.

DIN standard HI steel plate typically contains carbon and manganese, while DIN standard HII steel plate contains carbon and silicon in addition to manganese. The higher silicon content in DIN standard HII steel plate helps to improve its resistance to high-temperature environments, particularly for applications involving corrosive media.

In terms of mechanical properties, both DIN standard HI and DIN standard HII steel plates have similar tensile strength, yield strength, and elongation properties. However, DIN standard HII steel plate may have slightly higher mechanical properties due to its higher silicon content.

Overall, the choice between DIN standard HII and DIN standard HI boiler and pressure vessel steel plates will depend on the specific requirements of the application, particularly with regard to the environmental conditions, such as temperature and corrosive media.

HII Chemical Composition
Grade	The Element Max (%)
HII	C	Si	Mn	P	S	Al	Cr
	0.20	0.35	0.50-1.30	0.035	0.030	0.02	0.25
	Cu	Ni	Mo	Nb	Ti	V
	0.3	0.3	0.10	0.01	0.03	0.03

 

Grade	HII Mechanical Property
	Thickness	Yield	Tensile
HII	mm	Min Mpa	Mpa
	6-16	265	410-530
	16-40	255	410-530
	40-60	245	410-530
	60-100	215	410-530
	100-150	200	410-530