COLD FORMING MATERIALS

SUM31 Cold heading steel wire

MATERIALSENGINEERINGCREATION GROUP

Products / JIS Standard / JIS G4804

SUM31 Cold heading steel wire

Diameter of wire: 0.40-46mm

Tensile Strength: Please refer to the technical information page

Product Detail Technical Information Inspection Packaging

Shanghai Creation GroupIs China. It is a benchmark company that has 20 years of experience in an enterprise that focuses on cold heading quality steel wires in the entire management team. We have a good relationship with many tier one suppliers in the automotive industry and all the wire wire is supplied by brand steel mills. All orders are 100% traceable.

Technical delivery conditions

Surface Quality

- : Continuous, smooth

- : No stitches, no overlap, potholes, scratches, no extension marks

- : No rust

Applied Industry

- : Automotive Industry

- : Construction

- : Machinery & Equipment Industry

- : Other Industries

Case Study

Products & Service

Wire rod

Pickling and phosphating

Cold drawing

Spheroidizing annealing

Inspection

Finished products

1. Chemical composition

Table 1 -- Chemical Components, Units %

Steel grade	C	Mn	P	S	Pb
SUM21	<0.13	0.70~1.00	0.07~0.12	0.16~0.23
SUM22	<0.13	0.70~1.00 c）	0.07~0.12	0.24~0.33
SUM22L	<0.13	0.70~1.00 c）	0.07~0.12	0.24~0.33	0.10~0.35 d）
SUM23	<0.09	0.75~1.05	0.04~0.09	0.26~0.35
SUM23L	<0.09	0.75~1.05	0.04~0.09	0.26~0.35	0.10~0.35 d）
SUM24L	<0.15	0.85~1.15	0.04~0.09	0.26~0.35	0.10~0.35 d）
SUM25	<0.15	0.90~1.40	0.07~0.12	0.30~0.40
SUM31	0.14~0.20	1.00~1.30	<0.040	0.08~0.13
SUM31L	0.14~0.20	1.00~1.30	<0.040	0.08~0.13	0.10~0.35 d）
SUM32	0.12~0.20	0.60~1.10	<0.040	0.10~0.20
SUM41	0.32~0.39	1.35~1.65	<0.040	0.08~0.13
SUM42	0.37~0.45	1.35~1.65	<0.040	0.08~0.13
SUM43	0.40~0.48	1.35~1.65	<0.040	0.24~0.33

Note a) Si is not defined. However, a limit value or range of 0.10% or less, 0.10-0.20%, 0.15-0.35%, etc. may be determined by the agreement between the receiving parties.
b) The elements not specified in this table should not be intentionally added to the steel except for the purpose of finishing the molten steel, unless there is an agreement between the receiving parties.
c) For the Mn of SUM22 and SUM22L, the upper limit can be 1.10% according to the agreement between the receiving parties.
d) When the product analysis of lead of the lead-containing steel is performed according to the request of the orderer, the product analysis value of lead is 0.07 to 0.35%.

2. Mechanical properties of the wire

A value of a mechanical nature may be agreed between the receiving parties.

3. Shape and Dimensions Tolerance

Table 3 -- Hot Rolled Round Steel, Square Steel and Wire Wire Shape and Dimensions Tolerance

Item	Diameter or width across flats mm
	<16	>16~28	>28
Tolerance on diameter or width across flats mm	±0.4	±0.5	±1.8%
Out-of-roundness or deviation	Not more than 70% of the tolerance range for diameter or width across flats.
Length tolerance a）	Length ≤ 7 m	+40mm 0
	Length > 7 m	For each additional 1 m or fraction thereof, add 5 mm to the positive tolerance above; the negative tolerance is 0 mm.
Corner radius (R) a）	The corner radius shall be 10–20% of the width across flats.
Twist a）	Within a practical range.
Straightness a） b）	Per 1 m, not more than 3 mm; over the full length, not more than 3 mm × total length (m) / 1 m.

Note The deviation difference refers to the difference between the maximum value and the minimum value of the diameter in the same cross section of a steel material having a circular cross section. The deviation refers to the difference between the maximum value and the minimum value of the opposite-edge distance in the same cross-section of the square steel.
Note a) The allowances of the length, the roundness of the corners, the twisting, and the bending are not applied to the wire.
b) The bending of the steel bar for extraction (hot rolled steel) may be according to the agreement between the receiving parties.

Product Detail Technical Information Inspection Packaging