07Cr25Ni21NbN - GB /T 5310-2017

Grade	07Cr25Ni21NbN
Corresponding Standard	GB /T 5310-2017 Seamless steel tubes and pipes for high pressure boiler
Classification	Austenitic Stainless Steel

07Cr25Ni21NbN Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^①	N	Nb
Minimum Value	0.04	-	-	-	-	24	19	-	0.15	0.2
Maximum Value	0.1	0.75	2	0.03	0.015	26	22	0.25	0.35	0.6

* Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaseer, except for finishing the cast. The manufacturer shall take all appropriate measures to prevent the addition of these elements from scrap or other materials used in steelmaking, which may adversely affect the mechanical properties and usability.

Approximate Comparison Table Seamless steel tubes and pipes for high pressure boiler

China		United States
GB	ISC	ASTM/AISI
07Cr25Ni21NbN 06Cr25Ni20NbCoB	S31059	SA-213 TP310HCbN TP310HCbN

07Cr25Ni21NbN Corresponding Standards(Same grade name, different standards)

1	GB 5310-2008
	07Cr25Ni21NbN
2	GB /T 5310-2017
	07Cr25Ni21NbN
3	GB /T 5310-2023
	07Cr25Ni21NbN S31059
4	GB /T 20878-2024
	07Cr25Ni21NbN S31059

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!