COLD FORMING MATERIALS

18 MnB4 CHQ wire

MATERIALSENGINEERINGCREATION GROUP

product Center / 18 MnB4 CHQ wire

18 MnB4 CHQ wire

diameter: 0.40-46mm

tensile strength: refer to technical information

Shanghai Chuang Group is a benchmark company in China focusing on cold-rolled high-quality steel wire. The entire management team has 20 years of industry experience. We have established good relationships with many first-level suppliers in the automotive industry, and all steel wires come from brand steel mills. All orders are 100% traceable.

Specification

+AR

+AC or +AC+PE

+AR+C

+AR+C+AC

+AR+C+AC+LC

+AC+C

Specification

-:continuous and smooth

-:No seams, overlaps, pits, scratches and drawing scars

-:free from rust

Specification

-:automobile industry

-:construction industry

-:machinery industry

-:other industries

Case Study

Products & Service

Wire rod

Pickling and phosphating

Cold drawing

Spheroidizing annealing

check

finished product

1. Delivery terms combination

Table B.1 -Combination of heat treatment conditions, product form and applicable requirements at the time of delivery

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 of steel for surface hardening (suitable for casting analysis)

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

3. mechanical properties

Table B.4 -Mechanical properties of nitrogen-containing alloy steel grades

Steel name	Diameter		Delivery condition
	Diameter		+AR		+AC or +AC+PE		+AR+C		+AR+C+AC		+AR+C+AC+LC		+AC+C
	above mm	up to mm	Rm max. MPa	Za min %	Rm max. MPa	Z min. %	Rm max. MPa	Z min %	Rm max. MPa	Z min. %	Rm max. MPa	Z min. %	Rm max. MPa	Z min. %
18MnB4	2	5	—				—		500	64	540	62
	5	10	580	55	500	64	680	53	480	64	520	62	600	59
	10	40	580	55	500	64	670	53	480	64	520	62	590	59
22MnB4	2	5		—	—				520	64	560	62		—
	5	10	600	55	520	62	720	53	500	64	540	62	630	59
	10	40	600	55	520	62	710	53	500	64	540	62	620	59
a The values are given only for information.

4. Hardening requirements

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

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