Brief introduction of Q420HD nuclear power steel

Q420HD carbon steel for nuclear power plants, used in chemical and nuclear industries. Q420HD is read as Q420 nuclear steel, Q is the acronym for yield, 420 is the yield value, and HD is the acronym for nuclear. Q420HD nuclear power steel executive standard: GB 30814.

Q420HD nuclear power steel heat treatment delivery status: hot rolling, hot rolling + tempering, normalizing, normalizing + tempering, quenching + tempering

Q420HD steel mechanical properties:

Thickness	Mechanical properties
40-100mm	Re (MPa)	≥420	When the yield is not obvious, use Rp0.2
	Rm(MPa)	585-705
	A50(%)	≥20
	Impact temperature (℃)	-30
	Akv(J)	≥47	Horizontal

High temperature drawing of Q420HD nuclear power steel (will be displayed in MPA units):

Grade	Thickness	Tensile Test	Tensile /MPa min
Grade	Thickness	Tensile Test	100	150	200	250	300	350
Q420HD	≤250mm	ReH/MPa	380	360	345	335	325	310
Q420HD	≤250mm	Rm/MPa	530	530	530	530	530	515

Q420HD nuclear power steel chemical composition:

C	Si	Mn	P	S	Ni	Cr	Mo	Cu	Nb	V
≤0.18	0.15-0.5	0.9-1.5	≤0.02	≤0.015	≤0.6	≤0.3	≤0.3	≤0.35	≤0.04	≤0.07

Remarks for ingredients: when the thickness of the steel plate is greater than 65mm, the Mn content can be increased to 1.6 at the maximum; Nb+V≤0.08; when adding aluminum to refine grains, Als≥0.015 or Alt≥0.02. When adding Nb, V, Ti and other alloys element, the lower limit of Al content is not required.

Are you also interested in further steel processing (machining)?

Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!

Fabrication and Machining Service 24h Technical support