GARBA 1812Mo
Stainless spring wire
GARBA 1812Mo is an austenitic stainless steel, which as compared to GARBA 178Mo offers a higher resistance against intergranular corrosion due to lower carbon content. The higher content of molybdenum also increases the resistance against general corrosion.
C (%) | Si (%) | Mn (%) | P max. (%) | S max. (%) | Cr (%) | Ni (%) | Mo (%) |
---|---|---|---|---|---|---|---|
0.07 | 1.00 | 2.00 | 0.045 | 0.015 | 16.50 - 18.50 | 10.00 - 13.00 | 2.00 - 3.00 |
For round wire
Diameter (mm) | Tolerance (mm) | Tensile Strength (N/mm²) |
---|---|---|
0.30 - 0.65 | ±0.008 | - |
0.66 - 1.01 | ±0.010 | - |
1.02 - 2.26 | ±0.015 | - |
2.27 - 4.01 | ±0.020 | - |
4.02 - 6.26 | ±0.025 | - |
6.27 - 8.00 | ±0.030 | - |
0.30 - 0.40 | 1675 - 1930 | |
0.41 - 0.50 | 1650 - 1900 | |
0.51 - 0.65 | 1625 - 1870 | |
0.66 - 0.80 | 1600 - 1840 | |
0.81 - 1.00 | 1575 - 1810 | |
1.01 - 1.25 | 1550 - 1780 | |
1.26 - 1.50 | 1500 - 1730 | |
1.51 - 1.75 | 1450 - 1670 | |
1.76 - 2.00 | 1400 - 1610 | |
2.01 - 2.50 | 1350 - 1550 | |
2.51 - 3.00 | 1300 - 1500 | |
3.01 - 3.50 | 1250 - 1440 | |
3.51 - 4.25 | 1225 - 1410 | |
4.26 - 5.00 | 1200 - 1380 | |
5.01 - 6.00 | 1150 - 1320 | |
6.01 - 7.00 | 1125 - 1290 | |
7.01 - 8.00 | 1075 - 1240 |
Surface performance
AC-surface 0.30–8.00 mm Ø. The AC-coating can be removed before heat treatment by using a 10-20% nitric acid pickle at room temperature.
E and G modulus of elasticity
Abt. 175 kN/mm2 in drawn condition.
Abt. 180 kN/mm2 after heat treatment.
E and G modulus of shear
Abt. 68 kN/mm2 in drawn condition.
Abt. 71 kN/mm2 after heat treatment.
Density: 8.00 kg/dm3.
Heat conductivity
Temperature oC | 20 | 100 | 200 | 400 |
W/(m*oC) | 13.5 | 14.5 | 15.5 | 18.5 |
Resistivity
Temperature oC | 20 | 100 | 200 | 400 |
nΩm | 750 | 800 | 850 | 1000 |
Linear expansion
Pro oC | 30-100 | 30-200 | 30-400 |
x10-6 | 16.5 | 17.0 | 18.0 |
Specific heat capactity
Temperature oC | 20 | 100 | 200 | 400 |
J/(kg*oC) | 440 | 480 | 520 | 560 |
Heat treatment
As soon as possible after coiling, the springs should be stress relieved.
Recommended temperature for compression springs or tension springs without initial tension is approx. 420 ºC for 0.5 - 4 hours.