What Is The Chemical Makeup Of Quenched Steel

Unalloyed and alloyed quenched and tempered steels – high strength and ductility after hardening for highly stressed components

Fields of application of unalloyed and alloyed quenched and tempered steels

Circular saw blade made of hot-rolled alloyed quenched and tempered steel.

The unalloyed quenched and tempered steels are used for lower loads, whereas the alloyed quenched and tempered steels are suited for high dynamic and static loads. Moreover, the strength and ductility requirements are decisive for the choice of steel grades; the component dimensions must also exist taken into account. In many fields of application, the focus is on the maximum possible full quenching and tempering.

In that location are diverse fields of application of QT steels: typical applications in vehicle construction are camshafts and manual shafts, axles, clutch components and fastening elements. In mechanical and plant engineering, quenched and tempered steels are used, for instance, in shafts, pinions, gear wheels, chain links and saw blades.

thyssenkrupp supplies the following steel grades as per the production information or the reference steel grades in accordance with the respective standards.

Unalloyed quenched and tempered steel according to DIN EN ISO 683-1 (previously DIN EN 10083-2), DIN EN 10132-iii

Steel grade designation	Reference grade	Material no.	THICKNESS ¹ from _ to in mm	WIDTH ^ane from _ to in mm
C22	C22	one.1151	2.00 – 13.00	50 – 1,630
C25	C25	i.1158	two.00 – 13.00	50 – 1,630
C35	C35	one.1181	2.00 – 13.00	l – ane,630
C40	C40	1.1186	2.00 – thirteen.00	50 – 1,630
C45	C45	1.1191	two.00 – 13.00	50 – ane,630
C50	C50	one.1206	2.00 – 13.00	l – 1,630
C55	C55	1.1203	2.00 – 13.00	50 – 1,630
C60	C60	1.1221	2.00 – 13.00	50 – 1,630

1. Not all thickness and width combinations possible.

Chemical composition of unalloyed quenched and tempered steel

Steel grade	C [%]	Si [%] max.	Mn [%]	P [%] max.	Southward [%] max.	Cr [%] max.	Mo [%] max.	Ni [%] max.	Cr + Mo +Ni [%]max.
C22	0.17 – 0.24	0.xl	0.40 – 0.70	0.025	0.010	0.40	0.10	0.40	0.63
C25	0.22 – 0.29	0.40	0.twoscore – 0.lxx	0.025	0.010	0.forty	0.10	0.40	0.63
C35	0.32 – 0.39	0.forty	0.50 – 0.80	0.025	0.010	0.40	0.10	0.40	0.63
C40	0.37 – 0.44	0.40	0.50 – 0.eighty	0.025	0.010	0.xl	0.x	0.twoscore	0.63
C45	0.42 – 0.50	0.40	0.l – 0.80	0.025	0.010	0.twoscore	0.x	0.xl	0.63
C50	0.47 – 0.55	0.40	0.60 – 0.ninety	0.025	0.010	0.xl	0.10	0.40	0.63
C55	0.52 – 0.60	0.xl	0.60 – 0.xc	0.025	0.010	0.forty	0.10	0.xl	0.63
C60	0.57 – 0.65	0.40	0.threescore – 0.90	0.025	0.010	0.40	0.10	0.40	0.63

Mass fractions in ladle analysis.

Alloyed quenched and tempered steel according to DIN EN ISO 683-ii (previously DIN EN 10083-i and DIN EN 10083-iii), DIN EN 10132-three

Steel grade designation	Reference grade	Material no.	THICKNESS ¹ from _ to in mm	WIDTH ¹ from _ to in mm
34CrMo4	34CrMo4	1.7220	ii.00 – xiii.00	100 – 1,630
42CrMo4	42CrMo4	ane.7225	2.00 – xiii.00	100 – 1,630
50CrMo4	50CrMo4	i.228	2.00 – thirteen.00	100 – one,630
51CrV4	51CrV4	1.8159	2.00 – xiii.00	100 – 1,630
58CrV4	Special mill course	1.8161	2.00 – 13.00	100 – i,630

ane. Non all thickness and width combinations possible.

Chemical composition of assimilated quenched and tempered steel

Steel grade	C [%]	Si [%] max.	Mn [%]	P [%] max.	S [%] max.	Cr [%]	Mo [%] max. / -	V [%]	B [%]
34CrMo4	0,30 – 0,37	0,forty	0,60 – 0,90	0,025	0,010	0,ninety – 1,20	0,15 – ane,30	–	–
42CrMo4	0,38 – 0,45	0,xl	0,60 – 0,90	0,025	0,010	0,90 – 1,20	0,15 – 1,xxx	–	–
50CrMo4	0,46 – 0,54	0,40	0,fifty – 0,eighty	0,025	0,010	0,90 – 1,20	0,15 – 1,30	–	–
51CrV4	0,47 – 0,55	0,twoscore	0,70 – 1,10	0,025	0,010	0,90 – 1,20	0,10	0,10 – 0,25	–
58CrV4	0,54 – 0,62	0,twoscore	0,lxx – 1,10	0,025	0,010	0,xc – 1,twenty	–	0,10 – 0,xx	–

Mass fractions in ladle analysis.

Source: https://www.thyssenkrupp-steel.com/en/products/hot-strip/c-steel/unalloyed-and-alloyed-quenched-and-tempered-steel/unlegierter-und-legierter-verguetungsstahl.html

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