Materials used
Cecchi srl uses cold-drawn spring wire.
Stainless steel wire is specifically designed for the manufacture of springs exposed to corrosive agents and slight temperature increases. Despite being stainless steel, it has a certain degree of magnetic permeability.
Below are the specifications of the three materials listed
- INOX AISI 302 EN 10270-3
-INOX AISI 316
EN 10270-3
-Carbon steel EN 10270-1, grade DH
Stainless steel wire AISI 302
Chemical Composition, % by mass:
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Ni
|
N
|
|
0.05-0.15
|
2.0 max
|
2.0 max
|
0.045 max
|
0.015 max
|
16.0-19.0
|
0.80 max
|
6.0-9.5
|
0.11 max
|
|
Density
|
Young’s Modulus (E)
|
Shear Modulus (G)
|
Operating Temperature
|
|
8.0 Kg/dm3
|
185 KN/mm2
|
73 KN/mm2
|
-200 +250°
|
|
Wire Diameter
|
N/mm2
|
|
1.50 < d ≤ 1.75
|
1750-1900
|
|
≤ 0.2
|
2200-2350
|
|
1.75 < d ≤ 2.0
|
1700-1850
|
|
0.2 < d ≤ 0.3
|
2150-2300
|
|
2.0 < d ≤ 2.5
|
1650-1750
|
|
0.3 < d ≤ 0.4
|
2100-2250
|
|
2.5 < d ≤ 3.0
|
1600-1700
|
|
0.4 < d ≤ 0.5
|
2050-2200
|
|
3.0 < d ≤ 3.5
|
1550-1650
|
|
0.5 < d ≤ 0.65
|
2000-2150
|
|
2.5 < d ≤ 4.25
|
1500-1600
|
|
0.65 < d ≤ 0.8
|
1950-2100
|
|
4.25 < d ≤ 5.0
|
1450-1550
|
|
0.8 < d ≤ 1.0
|
1900-2050
|
|
5.0 < d ≤ 6.0
|
1400-1500
|
|
1.0 < d ≤ 1.25
|
1850-2000
|
|
6.0 < d ≤ 7.0
|
1350-1450
|
|
1.25 < d ≤ 1.5
|
1800-1950
|
|
7.0 < d ≤ 8.5
|
1300-1400
|
Stainless Steel Wire AISI 316
Chemical Composition, % by mass:
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Ni
|
N
|
|
0.07 max
|
1.0 max
|
2.0 max
|
0.045 max
|
0.015 max
|
16.5-18.5
|
2.0-2.50
|
10.0-13.0
|
0.11 max
|
|
Density
|
Young’s Modulus (E)
|
Shear Modulus (G)
|
Operating Temperature
|
|
8.0 Kg/dm3
|
180 KN/mm2
|
71 KN/mm2
|
-200 +250° C
|
Tensile Strength:
|
Wire Diameter
|
N/mm2
|
|
1.50 < d ≤ 1.75
|
≥ 1450
|
|
d ≤ 0.2
|
≤ 1725
|
|
1.75 < d ≤ 2.0
|
≥ 1400
|
|
0.2 < d ≤ 0.3
|
≥ 1700
|
|
2.0 < d ≤ 2.5
|
≥ 1350
|
|
0.3 < d ≤ 0.4
|
≥ 1675
|
|
2.5 < d ≤ 3.0
|
≥ 1300
|
|
0.4 < d ≤ 0.5
|
≥ 1650
|
|
3.0 < d ≤ 3.50
|
≥ 1250
|
|
0.5 < d ≤ 0.65
|
≥ 1625
|
|
2.5 < d ≤ 4.25
|
≥ 1225
|
|
0.65 < d ≤ 0.8
|
≥ 1600
|
|
4.25 < d ≤ 5.0
|
≥ 1200
|
|
0.8 < d ≤ 1.0
|
≥ 1575
|
|
5.0 < d ≤ 6.0
|
≥ 1150
|
|
1.0 < d ≤ 1.25
|
≥ 1550
|
|
6.0 < d ≤ 7.0
|
≥ 1075
|
|
1.25 < d ≤ 1.5
|
≥ 1500
|
|
7.0 < d ≤ 8.5
|
≥ 1050
|
Carbon steel wire EN 10270-1, grade DH
Wire for compression, extension, or torsion springs subjected to high static loads or medium-level dynamic stresses.
Chemical Composition, % by mass:
|
C
|
Si
|
Mn
|
P
|
S
|
Cu
|
| 0.45 - 1.00 |
0.10 - 0.30
|
0.50 - 1.20 |
0.020 max
|
0.025 max | 0.12 max |
|
Density
|
Young’s Modulus (E)
|
Shear Modulus (G)
|
Operating Temperature
|
|
7.85 Kg/dm3
|
206 KN/mm2
|
81.5 KN/mm2
|
-30 +100° C
|
Tensile Strength:
|
Wire Diameter
|
N/mm2
|
|
Diametro Filo | N/mm2 |
|
0.3
|
2660-2940 |
|
1.2
|
2170-2400
|
|
0.4
|
2560-2830
|
|
1.3
|
2140-2370
|
|
0.5
|
2480-2740 |
|
1.4
|
2110-2340 |
|
0.6
|
2410-2670 |
|
1.5
|
2090-2310 |
|
0.7
|
2360-2610
|
|
1.6
|
2060-2290 |
|
0.8
|
2310-2560
|
|
1.7
|
2040-2290
|
|
0.9
|
2270-2510
|
|
1.8
|
2020-2240
|
|
1.0
|
2230-2470
|
|
1.9 |
2000-2220
|
|
1.1
|
2200-2430
|
|
2.0 |
1980-2200
|