Oil tempered carbon steel wire

Oil tempered spring wire - For static 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, static springs, EN 10270-2 FD C, EN 10270-2 FDC, DIN 17223/2 FD, DIN 50602, M method, coil end tested

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

Utilization:
Static springs

Diameters:
3.00 - 18.50 mm

Chemical composition:

C	Si	Mn	P	S	Cu	Cr
0.60 - 0.75	0.10 - 0.35	0.50 - 1.20	≤0.030	≤0.025	≤0.12	*

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

Raw Material:
Wire rod from qualified international steelworks

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	1600 - 1750	45	to be agreed upon
3.20 - 3.50	0.030	1580 - 1730	42	to be agreed upon
3.50 - 4.00	0.030	1550 - 1700	42	to be agreed upon
4.00 - 4.20	0.035	1540 - 1690	40	to be agreed upon
4.20 - 4.50	0.035	1520 - 1670	40	to be agreed upon
4.50 - 4.70	0.035	1510 - 1660	40	to be agreed upon
4.70 - 5.00	0.035	1500 - 1650	40	to be agreed upon
5.00 - 5.60	0.035	1470 - 1620	38	to be agreed upon
5.60 - 6.00	0.040	1460 - 1610	38	to be agreed upon
6.00 - 6.50	0.040	1440 - 1590	35	to be agreed upon
6.50 - 7.00	0.040	1430 - 1580	35	to be agreed upon
7.00 - 8.00	0.045	1400 - 1550	35	to be agreed upon
8.00 - 8.50	0.045	1380 - 1530	32	to be agreed upon
8.50 - 10.00	0.050	1360 - 1510	32	to be agreed upon
10.00 - 12.00	0.070	1320 - 1470	30	to be agreed upon
12.00 - 14.00	0.080	1280 - 1430	30	to be agreed upon
14.00 - 15.00	0.080	1270 - 1420	to be agreed upon	to be agreed upon
15.00 - 17.00	0.090	1250 - 1400	to be agreed upon	to be agreed upon
17.00 - 18.50	0.090	1230 - 1380	to be agreed upon	to be agreed upon

• Allowed depth of surface defects at the coil ends: max. 1% of wire diameter
• Allowed depth of surface decarburisation at the coil ends: max. 1% of wire diameter
• Maximum permissible tensile strength variation within one coil: 70 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	static
unalloyed	TD C	dynamic
unalloyed	VD C	hoch dynamic
SiCr-alloyed	FD SiCr	static
SiCr-alloyed	TD SiCr	dynamic
SiCr-alloyed	VD SiCr	highly dynamic
SiCr-alloyed	VD SiCr SC	highly dynamic
SiCrV-alloyed	FD SiCrV	static
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