Steel Codes and Standards

Here we will introduce some commonly used steel codes of Chinese GB standards and the equivalent materials on other standards.

GB standards are the Chinese national standards, which is an abbreviation of Guojia Biaozhun. Currently, there are two standards for expressing steel grades, namely GB/T 221-2008 and GB/T 17616-2013. Generally, the steel grades are represented by capitalized Chinese pinyin letters, chemical element symbols, and Arabic numerals to indicate the name, use, characteristics, and process of steel products. For example, carbon steel is represented by “Q+number+quality grade”. Q here represents the yield point of the steel, and the following number represents the yield point value in MPa. And the quality grade is represented by A, B, C, and D respectively. For example, Q235 represents carbon steel with a yield point of 235 MPa.

Steel Codes and Standards

Items	Chinese Standard	American Standard	Japanese Standard	German Standard	International Standard
	GB	ASTM	JIS	DIN/DINEN	ISO 630
Common Carbon Steel	Q195	CR.B	SS330; SPHD; SPHC	S185	HR2
	Q215A	Cr.C; Cr.58	SS330; SPHC		HR1
	Q235A	Cr.D	SS400; SM400A	S235JR	E235B
	Q235B	Cr.D	SS400; SM400A	S235JRG1; S235JRG2	E235B
	Q275		SS490		E275A
Carbon Tool Steel	T7(A)		SK7	C70W2	TC70
	T8(A)	T72301; W1A-8	SK5; SK6	C80W1	TC80
	T8Mn(A)		SK5	C85W
	T10(A)	T72301; W1A-91/2	SK3； SK4	C105W1	TC105
	T11(A)	T72301; W1A-101/2	SK3	C105W1	TC105
	T12(A)	T72301; W1A-111/2	SK2		TC120
Stainless Steel	1Cr18Ni9Ti	S32100(UNS) (321)	SUS321	X6CrNiTi18-10	X6CrNiTi1810
	2Cr13	S42000(UNS) (420)	SUS420J1	X20Cr13	4
	40Mn	1043	SWRH42B	C40	SL; SM
	45Mn	1046	SWRH47B	C45
	65Mn	1065			SL; SM; TypeSC; TypDC
Low alloy structural steel	Q420C	Gr.B; Type7	SEV295; SEV345	S420NL; S420ML	HS420D; E420DD
	Q460D	Gr.65	SM570; SMA570W; SMA570P	S460NL; S460ML	E460DD; F460E
High-quality Carbon Structural Steel	08F	1008; 1010	SPHD; SPHE
	10	1010	S10C; S12C	CK10	C101
	15	1015	S15C; S17C	CK15; Fe360B	C15E4
	20	1020	S20C; S22C	C22
	25	1025	S25C; S28C	C25	C25E4
	40	1040	S40C; S43C	C40	C40E4
	45	1045	S45C; S48C	C45	C45E4
	50	1050	S50C; S53C	C50	C50E4
	15Mn	1019

Note: These are parts of the steel codes and standards. If the material you want to know is not here, please contact us for details!

Before purchasing, you need to confirm the material and steel grade. If you are not sure about the grade of steel, you can tell us the use purpose and use environment. We will offer you a suitable solution. More than that, the standards will help you with quality control. At Wanzhi Steel, we put quality first place. Also, the third-party quality inspection is acceptable. Welcome to contact us for more details!