COLD FORMING MATERIALS

20CrS4 CHQ wire

MATERIALSENGINEERINGCREATION GROUP

Products / ISO Standards / ISO 4954-Annex B

20CrS4 CHQ wire

Diameter: 0.40-46mm

Tensile strength: Refer to technical information

Product Detail Technical Information Inspection Packaging

Shanghai Creation Group is a benchmark enterprise who focus on cold heading quality steel wire in China.The whole management team has 20 years of experience in the industry.We build good relationships with many tier 1 suppliers to the automotive industry, all wire rod is sourced from branded steel mills. All orders are 100% traceable.

Delivery condition

: +AC

: +FP

: +AR+C+AC

: +AR+C+AC+LC

Surface quality

- : Continuous and smooth

- : Free of seams, overlaps, pits, scratches and drawing scars

- : Free of rust

Application

- : Automobile industry

- : Construction industry

- : Machinery industry

- : Other Industries

Case Study

Products & Service

Wire rod

Pickling and phosphating

Cold drawing

Spheroidizing annealing

Inspection

Finished product

1.Combination of delivery terms

Table B.1 —Combinations of heat-treatment conditions at delivery,product forms and applicable requirements

Heat-treatment condition at delivery	Symbol	Products form a			Applicable requirements in cases where the steel concerned has been ordered with reference to the steel names indicated in
Heat-treatment condition at delivery	Symbol	Wire rod	Bar	Wire	TablesB.2,B.3,B.4 or B.5		TablesB.2,B.3,B.4,B.5,B.6 or B,7			Optional
As hot-rolled or peeled	+AR or +PE	X	X	X	Chemical composition as specified in Table B.2	Mechanical properties as specified in TablesB.3,B.4 and B.5	Chemical compositior as specified in Table B.2	Mechanical properties as specified inTablesB,3,B.4 and B.5	Values for hardenability according to Tables B.6 and B.7	Supplementa- ry or special requirements as specified in Annex Eh
Cold drawn	+AR+C	-	X	X
Cold drawn + spheroidized	+AR+C+AC	-	X	X
Cold drawn + spheroidized+skin passed	+AR+C+AC +LC	-	X	X
Spheroidized or spheroidized+peeled	+AC or +AC +PE	X	X	X
Spheroidized+cold drawn	+AC+C		X	X
Treated to ferrite- pearlite structure and hardness range	+FP	-	X	-
Others	Other delivery conditions may be agreed at the time of ordering
a X=applicable,-=not applicable. b If agreed at the time of the enquiry and order.

2.Chemical composition

Table B.2 —Chemical composition (applicable to cast analysis)of steels for case hardening

Steel name b	% mass fraction a
Steel name b	C	Si c	Mn	P	S	Cr	Ni	Mo	B	Cu
Non-alloy steel grades
C10E2C	0,08 to 0,12	0,30	0,30 to 0,60	0,025	0,025		—		—	0,25
C15E2C	0,13 to 0,17	0,30	0,30 to 0,60	0,025	0,025		—	—	—	0,25
C17E2C	0,15 to 0,19	0,30	0,60 to 0,90	0,025	0,025		—	—	—	0,25
C20E2C	0,18 to 0,22	0,30	0,30 to 0,60	0,025	0,025	—	—		—	0,25
Alloy steel grades
18MnB4	0,16 to 0,20	0,30	0,90 to 1,20	0,025	0,025		—	—	0,0008 to 0,005	0,25
22MnR4	0,20 to 0,24	0,30	0,90 to 1,20	0,025	0,025	——	—	—	0,0008 to 0,005	0,25
17Cr3	0,12 to 0,20	0,30	0,60 to 0,90	0,025	0,025	0,70 to 1,25	—	—	—	0,25
17CrS3	0,12 to 0,20	0,30	0,60 to 0,90	0,025	0,020 to 0,040	0,70 to 1,25	—	—	—	0,25
20Cr4	0,17 to 0,23	0,30	0,60 to 0,90	0,025	0,025	0,90 to 1,20	—	—	—	0,25
20CrS4	0,17 to 0,23	0,30	0,60 to 0,90	0,025	0,020 to 0,040	0,90 to 1,20	—	—	—	0,25
16MnCr5	0,14 to 0,19	0,30	1,00 to 1,30	0,025	0,025	0,80 to 1,10		—	—	0,25
16MnCrS5	0,14 to 0,19	0,30	1,00 to 1,30	0,025	0,020 to 0,040	0,80 to 1,10	—	—		0,25
16MnCrB5	0,14 to 0,19	0,30	1,00 to 1,30	0,025	0,025	0,80 to 1,10	—	—	0,0008 to 0,005	0,25
20MnCrS5	0,17 to 0,22	0,30	1,10 to 1,40	0,025	0,020 to 0,040	1,00 to 1,30	—	—	—	0,25
12CrMo4	0,10 to 0,15	0,30	0,60 to 0,90	0,025	0,025	0,90 to 1,20	—	0,15 to 0,25	—	0,25
18CrMo4	0,15 to 0,21	0,30	0,60 to 0,90	0,025	0,025	0,90 to 1,20	—	0,15 to 0,25	—	0,25
18CrMoS4	0,15 to 0,21	0,30	0,60 to 0,90	0,025	0,020 to 0,040	0,90 to 1,20	—	0,15 to 0,25	—	0,25
20MoCr4	0,17 to 0,23	0,30	0,70 to 1,00	0,025	0,025	0,30 to 0,60		0,40 to 0,50		0,25
20MoCrS4	0,17 to 0,23	0,30	0,70 to 1,00	0,025	0,020 to 0,040	0,30 to 0,60	—	0,40 to 0,50	—	0,25
Elements not quoted in this table should not be intentionally added to the steel without the agreement of the purchaser,except those intended for finishing the heat.All reasonable precautions shall be taken in order to prevent the addition of such elements from scrap or other materials used in the production process,which can affect the hardenability, mechanical properties and applicability To improve the performance of cold heading,it is possible to add Al:0,020 %to 0,050 % a Maximum values unless otherwise indicated. b In the case of steels with hardenability requirements (see Tables B.6 and B.Z),minor deviations from the specified limits are permitted (with the exception of sulfur and phosphorus),provided that they do not exceed 0,01 %for carbon and the values indicated in Table 2 for the other elements. c A lower silicon content or a specific silicon range may be agreed at the time of ordering

Table B.2 —Chemical composition (applicable to cast analysis)of steels for case hardening continued

Steel name b	% mass fraction a
Steel name b	C	Si c	Mn	P	S	Cr	Ni	Mo	B	Cu
10NiCr5-4	0,07 to 0,12	0,30	0,60 to 0,90	0,025	0,025	0,90 to 1,20	1,20 to 1,50			0,25
12NiCr3-2	0,09 to 0,15	0,30	0,30 to 0,60	0,025	0,025	0,40 to 0,70	0,50 to 0,80	—		0,25
17CrNi6-6	0,14 to 0,20	0,30	0,50 to 0,90	0,025	0,025	1,40 to 1,70	1,40 to 1,70			0,25
20NiCrMo2-2	0,17 to 0,23	0,30	0,65 to 0,95	0,025	0,025	0,35 to 0,70	0,40 to 0,70	0,15 to 0,25		0,25
20NiCrMoS2-2	0,17 to 0,23	0,30	0,65 to 0,95	0,025	0,020 to 0,040	0,35 to 0,70	0,40 to 0,70	0,15 to 0,25	—	0,25
20NiCrMo7	0,17 to 0,23	0,30	0,40 to 0,70	0,025	0,025	0,35 to 0,65	1,60 to 2,00	0,20 to 0,30		0,25
20NiCrMoS6-4	0,16 to 0,23	0,30	0,50 to 0,90	0,025	0,020 to 0,040	0,60 to 0,90	1,40 to 1,70	0,25 to 0,35	—	0,25
Elements not quoted in this table should not be intentionally added to the steel without the agreement of the purchaser,except those intended for finishing the heat.All reasonable precautions shall be taken in order to prevent the addition of such elements from scrap or other materials used in the production process,which can affect the hardenability, mechanical properties and applicability To improve the performance of cold heading,it is possible to add Al:0,020 %to 0,050 % a Maximum values unless otherwise indicated. b In the case of steels with hardenability requirements (see TablesB.6 and B.7),minor deviations from the specified limits are permitted (with the exception of sulfur and phosphorus),provided that they do not exceed 0,01 %for carbon and the values indicated in Table 2 for the other elements. c A lower silicon content or a specific silicon range may be agreed at the time of ordering.

3.Mechanical Properties

Table B.5 —Mechanical properties of alloy steel grades

Steel name	Diameter		Delivery condition
	Diameter		+AC		+FP		+AR+C+AC		+AR+C+AC+LC		+AC+C
	above mm	up to mm	Rm max. MPa	Za min %	HB Min.max.		Rm max. MPa	Z min %	Rm max. MPa	Z min. %	Rm max. MPa	Z min. %
17Cr3 17CrS3	2	5					520	62	560	60
	5	10	520	60	140	187	500	62	540	60	630	57
	10	40	520	60	140	187	500	62	540	60	620	57
20Cr4 20CrS4	2	5
	5	10					540	60	580	60	640	55
	10	40	640	60	—	—	540	60	580	60	640	55
16MnCr5 16MnCrS5 16MnCrB5	2	5					550	64	590	62	—
	5	10	550	62	140	187	530	64	570	62	660	59
	10	40	550	62	140	187	530	64	570	62	650	59
20MnCrS5	2	5	一 —	—	—		570	62	610	60	—	—
	5	10	570	60	152	201	550	62	590	60	680	57
	10	40	570	60	152	201	550	62	590	60	670	57
12CrMo4	2	5					500				—
	5	10	500	62	135	185	480	64	520	62	—	一
	10	40	500	62	135	185	480	64	520	62
18CrMo4 18CrMoS4	2	5		一			550	62	590	60	一
	5	10	550	60	140	187	530	62	570	60	660	57
	10	40	550	60	140	187	530	62	570	60	650	57
20MoCr4 20MoCrS4	2	5	—	—			560	62	600	60		一
	5	10	560	60	140	187	540	62	580	60	670	57
	10	40	560	60	140	187	540	62	580	60	660	57
10NiCr5-4	2	5		—			520	64	560	62	—	—
	5	10	520	62	137	187	500	64	540	62	640	59
	10	40	520	62	137	187	500	64	540	62	630	59

Table B.5 —Mechanical properties of alloy steel grades continued

Steel name	Diameter		Delivery condition
			+AC		+FP		+AR+C+AC		+AR+C+AC+LC		+AC+C
			Mechanical properties
	above mm	up to mm	Rm max. MPa	Z min %	HB Min.max.		Rm max. MPa	Z min %	Rm max. MPa	Z min. %	Rm max. MPa	Z min. %
12NiCr3-2	2	5	—	—			500	64	540	62	—	—
	5	10	500	62	130	180	480	64	520	62	620	59
	10	40	500	62	130	180	480	64	520	62	610	59
17CrNi6-6	2	5					600	62	640	60
	5	10	600	60	156	207	580	62	620	60	720	57
	10	40	600	60	156	207	580	62	620	60	710	57
20NiCrMo2-2 20NiCrMoS2-2	2	5					590	62	630	60
	5	10	590	60	149	194	570	62	610	60	720	57
	10	40	590	60	149	194	570	62	610	60	710	57
20NiCrMo7	2	5		—			—	—			—
	5	10				—	680	60			700	55
	10	25	—	—	—	—	680	60	—	—	700	55
20NiCrMoS6-4	2	5					610	60	650	58	—
	5	10	610	58	149	201	590	60	630	58	730	55
	10	25	610	58	149	201	590	60	630	58	720	55

4.Hardenability Requirements

Table B.6—Hardness limits for steel grades with standard hardenability (+H grades)

Steel name	Symbol	Austenitizing temperature ℃±5℃	Limits of range	Hardness HRC at a distance from quenched end of test piece(in mm)of
Steel name	Symbol	Austenitizing temperature ℃±5℃	Limits of range	1,5	3	5	7	9	11	13	15	20	25	30	35	40
18MnB4	+H	890	max.	46	45	44	41	39	35	32	28	21		—
18MnB4	+H	890	min.	40	38	37	30	21	—	—			—
22MnB4	+H	880	max.	49	48	47	45	42	39	35	32	24	20		—
22MnB4	+H	880	min.	43	41	40	32	23			—	—	—		—
17Cr3	+H	880	max	47	44	40	33	29	27	25	24	23	21	—	—
17CrS3	+H	880	min.	39	35	25	20	—	—	一		—		—	—
20Cr4	+H	900	max.	49	48	46	42	38	36	34	32	29	27	26	24	23
20CrS4	+H	900	min.	41	38	31	26	23	21-	—	—	—	—	—	—	—
16MnCr5	+H	870	max.	47	46	44	41	39	37	35	33	31	30	29	28	27
16MnCrS5	+H	870	min.	39	36	31	28	24	21		一	—				—
16MnCrB5	+H	870	max.	47	46	44	41	39	37	35	33	31	30	29	28	27
16MnCrB5	+H	870	min.	39	36	31	28	24	21			—				—
20MnCrS5	+H	870	max.	49	49	48	46	43	42	41	39	37	35	34	33	32
20MnCrS5	+H	870	min.	41	39	36	33	30	28	26	25	23	21	—	—
12CrMo4	+H	870	max.	44	43	41	38	34	30	28	27	23	21		一	—
12CrMo4	+H	870	min.	36	34	30	26	22	—	—	—	—			—	—
18CrMo4	+H	880	max.	47	46	45	42	39	37	35	34	31	29	28	27	26
18CrMoS4	+H	880	min.	39	37	34	30	27	24	22	21
20MoCr4	+H	910	max.	49	47	44	41	38	35	33	31	28	26	25	24	24
20MoCrS4	+H	910	min.	41	37	31	27	24	22			—				—
10NiCr5	+H	880	max.	41	39	37	34	32	30		—	—		—	—	—
10NiCr5	+H	880	min	32	27	24	22	一	一		—	—			—	—
12NiCr3-2	+H	870	max.	43	40	35	26	21			—	—	—	—	—	—
12NiCr3-2	+H	870	min.	37	32	25	—		—		一	—	—		—
17CrNi6-6	+H	870	max.	47	47	46	45	43	42	41	39	37	35	34	34	33
17CrNi6-6	+H	870	min.	39	38	36	35	32	30	28	26	24	22	21	20	20
20NiCrMo2-2	+H	880	max.	49	48	45	42	36	33	31	30	27	25	24	24	23
20NiCrMoS2-2	+H	880	min.	41	37	31	25	22	20

Table B.6—Hardness limits for steel grades with standard hardenability (+H grades) continued

Steel name	Symbol	Austenitizing temperature °℃±5℃	Limits of range	Hardness HRC at a distance from quenched end of test piece(in mm)of
Steel name	Symbol	Austenitizing temperature °℃±5℃	Limits of range	1,5	3	5	7	9	11	13	15	20	25	30	35	40
20NiCrMo7	+H	900	max.	48	47	45	42	39	36	34	32	29	26	25	24	24
20NiCrMo7	+H	900	min	40	38	34	30	27	25	23	22	20		一	—	—
20NiCrMoS6-4	+H	880	max.	49	49	48	48	47	47	46	44	41	39	38	37	36
20NiCrMoS6-4	+H	880	min.	41	40	39	36	33	30	28	26	23	21	—	—	—

Table B.7 —Hardness limits for steel grades with restricted hardenability scatter bands (+HH and+HL grades)

Steel name	Symbol	Austenitizing temperature ℃±5℃	Limits of range	Hardness HRC at a distance from quenched end of test piece(in mm)of
Steel name	Symbol	Austenitizing temperature ℃±5℃	Limits of range	1,5	3	5	7	9	11	13	15	20	25	30	35	40
17Cr3 17CrS3	+HH	880	max.	47	44	40	33	29	27	25	24	23	21	—	—	—
	+HH		min.	42	38	30	24	20	—		—	—	—	—	—	—
	+HL		max.	44	41	35	29	25	23	21	20		—			—
	+HL		min.	39	35	25	20		—				一
20Cr4 20CrS4	+HH	900	max	49	48	46	42	38	36	34	32	29	27	26	24	23
	+HH		min.	44	41	36	31	28	26	24	22	—	—	—	—	—
	+HL		max.	46	45	41	37	33	31	29	27	24	22	21
	+HL		min.	41	38	31	26	23	21-	—	—	—	—	—	—	—
16MnCr5 16MnCrS5	+HH	870	max.	47	46	44	41	39	37	35	33	31	30	29	28	27
	+HH		min.	42	39	35	32	29	26	24	22	20	—	—		—
	+HL		max.	44	43	40	37	34	32	30	28	26	25	24	23	22
	+HL		min.	39	36	31	28	24	21		—		—	—
16MnCrB5	+HH	870	max.	47	46	44	41	39	37	35	33	31	30	29	28	27
	+HH		min.	42	39	35	32	29	26	24	22	20	一	—	—	—
	+HL		max.	44	43	40	37	34	32	30	28	26	25	24	23	22
	+HL		min.	39	36	31	28	24	21	—	—	—	—	—	—	—
20MnCrS5	+HH	870	max.	49	49	48	46	43	42	41	39	37	35	34	33	32
	+HH		min.	44	42	40	37	34	33	31	30	28	26	25	24	23
	+HL		max.	46	46	44	42	39	37	36	34	32	30	29	28	27
	+HL		min.	41	39	36	33	30	28	26	25	23	21	—
12CrMo4	+HH	870	max.	44	43	41	38	34	30	28	27	23	21	—	—	—
	+HH		min.	39	37	34	30	26	21		—	一	一	一	—	—
	+HL		max.	41	40	37	34	30	26	23	20	—	—	—	—
	+HL		min.	36	34	30	26	22	—	—	—	—	—	—	—	—
18CrMo4 18CrMoS4	+HH	880	max.	47	46	45	42	39	37	35	34	31	29	28	27	26
	+HH		min.	42	40	38	34	31	28	26	25	22	20	—	—
	+HL		max	44	43	41	38	35	33	31	30	27	25	24	23	22
	+HL		min.	39	37	34	30	27	24	22	21	—	—		—	—

Table B.7 —Hardness limits for steel grades with restricted hardenability scatter bands (+HH and+HL grades) continued

Steel name	Symbol	Austenitizing temperature ℃±5℃	Limits of range	Hardness HRC at a distance from quenched end of test piece(in mm)of
Steel name	Symbol	Austenitizing temperature ℃±5℃	Limits of range	1,5	3	5	7	9	11	13	15	20	25	30	35	40
20MoCr4 20MoCrS4	+HH	910	max.	49	47	44	41	38	35	33	31	28	26	25	24	24
	+HH		min.	44	40	35	32	29	26	24	22	一		—	—
	+HL		max.	46	44	40	36	33	31	29	27	24	22	21	20	20
	+HL		min.	41	37	31	27	24	22	—	—	—	—		—	—
10NiCr5-4	+HH	880	max.	41	39	37	34	32	30		—	—	—	—	—
	+HH		min.	33	29	26	24	21	20
	+HL		max	38	35	32	30	27	25	—	—	—	—		—
	+HL		min.	32	27	24	22	—		一	—	—		—	—	—
17CrNi6-6	+HH	870	max	47	47	46	45	43	42	41	39	37	35	34	34	33
	+HH		min	42	41	39	38	36	34	32	30	28	26	25	25	24
	+HL		max.	44	44	43	42	39	38	37	35	33	31	30	29	29
	+HL		min	39	38	36	35	32	30	28	26	24	22	21	20	20
20NiCrMo2-2 20NiCrMoS2-2	+HH	880	max	49	48	45	42	36	33	31	30	27	25	24	24	23
	+HH		min.	44	41	36	31	27	24	22	21	—	—	—	—	—
	+HL		max.	46	44	40	36	31	29	27	26	23	21	20	20
	+HL		min.	41	37	31	25	22	20
20NiCrMoS6-4	+HH	880	max	49	49	48	48	47	47	46	44	41	39	38	37	36
	+HH		min.	44	43	42	40	38	36	34	32	29	27	26	25	24
	+HL		max	46	46	45	44	42	41	40	38	35	33	32	31	30
	+HL		min.	41	40	39	36	33	30	28	26	23	21	—	—