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Grooved steel for springs |
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| Material |  |
| Electric steel, grade 56Si17A and 60Si15A with the chemical composition and the mechanical characteristics according to STAS 795-87. |
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| Dimensions, weight and limit tolerances. | |
| According to STAS 909-91 |
| Section dimension | Weight | |||||||
| Width a | Trickness b | r1 | r2 | r3 | r4 | r5 | r max. | |
| 90 | 13 | 4,5 | 3,75 | 1,0 | 1,0 | 3,0 | 200 | 9,18 |
| 120 | 13 | 4,5 | 3,75 | 1,0 | 1,0 | 3,0 | 200 | 12,25 |
| 120 | 16 | 4,5 | 3,75 | 1,0 | 1,0 | 3,0 | 200 | 15,07 |
| 130 | 16 | 3,5 | 3,25 | 1,5 | 1,0 | 1,5 | 200 | 16,30 |
| Dimensions | a | b | r1 | r2 | r3 | r max | |
| Limit tolerance [mm] | <=120 | >120 | |||||
| ± 0,5 | + 0,7/ - 0,5 | ± 0,2 | + 0,5 / 0 | 0 / -0,5 | + 1,0 / 0 | + 1,0 / - 1,0 | |
| Rib channel coaxiality related to the shape axis of symmetry | max. 0,3 mm |
| Channel coaxiality related to the rib | max. 0,3 mm |
| Spring leaf bending deflection in its plane (stickle - shaped) | max. 2,0 mm/m |
| Spring leaf bending deflection in a plan which is perpendicular on two sides | max. 10,0 mm/m |
| Twist of the spring leaf | max. 1,2 mm/m |
| Length types |
Delivery lengths [m] |
Permitted dev. [mm] |
| Manufacture lengths | 5 - 8 | - |
| Fixed lengths | 5 - 8 | + 50 / - 0 |
| Delivery state | Delivery |
| Rough rolled, straightened and without heat treatment | Without packing and unprotected to corrosion, not bundled or in bundles with the weight of max.3 t. |
