Oil tempered carbon steel wire valve quality

Oil tempered valve spring wire - Continuously tested - For highly dynamic springs

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trade, sales, commerce, marketing, distribution, oil tempered steel wire, tempered carbon steel wire, oil tempered spring wire, tempered carbon spring wire, highly dynamic springs, clutch springs, EN 10270-2 VD C, EN 10270-2 VDC, DIN 17223/2 VD, DIN 50602, M method, continuously tested

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In compliance with:
EN 10270-2 VD C
DIN 17223/2 VD C

Utilization:
For springs with highly dynamic duty - clutch springs or similar utilization

Diameters:
3.00 - 18.50 mm

Chemical composition:

C	Si	Mn	P	S	Cu	Cr
0.60 - 0.75	0.15 - 0.30	0.50 - 1.00	≤0.020	≤0.020	≤0.10	*

* With the addition of Chrome (max. 0.30%) deliverable

Raw Material:
Wire rod from qualified international steelworks

Non destructive defect control:
In line tested wire on the whole length for surface defects of minimum depth of 40, 50 or 60 µm

Non metallic inclusions:
In compliance with DIN 50602, M method, for all kind of inclusions the maximum size is No. 2

Mechanical and technological properties:

Nominal diameter (a < Ø ≤ b) [mm]	Allowed deviations (±) [mm]	Tensile strength [N/mm²]	Minimum reduction [Z %]	Minimum number of twists Lo = 50 × d Min. 100% Right - Left
3.00 - 3.20	0.030	1570 - 1670	45	6 - 10
3.20 - 3.50	0.030	1570 - 1670	45	6 - 10
3.50 - 4.00	0.030	1550 - 1650	45	6 - 8
4.00 - 4.20	0.035	1550 - 1650	45	6 - 8
4.20 - 4.50	0.035	1550 - 1650	45	6 - 8
4.50 - 4.70	0.035	1540 - 1640	45	6 - 6
4.70 - 5.00	0.035	1540 - 1640	45	6 - 6
5.00 - 5.60	0.035	1520 - 1620	40	6 - 6
5.60 - 6.00	0.040	1520 - 1620	40	6 - 4
6.00 - 6.50	0.040	1470 - 1570	40	to be agreed upon
6.50 - 7.00	0.040	1470 - 1570	40	to be agreed upon
7.00 - 8.00	0.045	1420 - 1520	40	to be agreed upon
8.00 - 10.00	0.045	1390 - 1490	38	to be agreed upon
10.00 - 12.00	0.060	1390 - 1490	38	to be agreed upon
12.00 - 14.00	0.070	1350 - 1450	to be agreed upon	to be agreed upon
14.00 - 15.00	0.070	1340 - 1440	to be agreed upon	to be agreed upon
15.00 - 17.00	0.080	1320 - 1420	to be agreed upon	to be agreed upon
17.00 - 18.50	0.080	1300 - 1400	to be agreed upon	to be agreed upon

• Allowed depth of surface defects at the continuouslys: max. 0.5% of wire diameter
• Allowed depth of surface decarburisation at the continuouslys: max. 0.5% of wire diameter
• Maximum permissible tensile strength variation within one coil: 60 N/mm²
• Out of roundness: i.e. the difference between the maximum and minimum diameter of the wire at the same cross section is not more than 50% of the total permissible deviation in the diameter
• Yield point (limit 0.2%): minimum 90% of tensile strength
• Elastic modulus: E = 206 kN/mm² (nominal value)
• Shear modulus: G = 79,5 kN/mm² (nominal value)
• Heat treatment: after the coiling the springs should be stress relieved at T = 420 ± 5°C for 30 min; after shot peening should be stress relieved at T = 250 ± 10°C for 30 min

 

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Alloy	EN 10270-2	Stress
unalloyed	FD C	highly dynamic
unalloyed	TD C	dynamic
unalloyed	VD C	hoch dynamic
SiCr-alloyed	FD SiCr	highly dynamic
SiCr-alloyed	TD SiCr	dynamic
SiCr-alloyed	VD SiCr	highly dynamic
SiCr-alloyed	VD SiCr SC	highly dynamic
SiCrV-alloyed	FD SiCrV	highly dynamic
SiCrV-alloyed	TD SiCrV	dynamic
SiCrV-alloyed	VD SiCrV	highly dynamic
SiCrV-alloyed	VD SiCrV SC	highly dynamic

 

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  For spring wire according to EN 10270-1, DIN 17223/1, please click here