"Standard" spring steel comes in several grades. At Roveron, Class-C spring steel is the most commonly used standard wire grade.
The table below shows the applications for wire and sheet steel and then the desired heat treatments to have optimum springs in the desired conditions.
For leaf springs, C75 is the most common "ordinary" steel grade. In practice, however, this is a type of material, which will crack very often under the influence of buiding. We often advise our customers to choose stainless steel spring band steel.
| Description |
Material No. |
EN/DIN |
Characteristic |
Application |
| Kl-B |
1.0600 |
EN 10270-1/ DIN 17223-1 |
Carbon spring steel |
Wire; standard spring steel of standard level |
| Kl-C |
1.1200 |
EN 10270-1 / DIN 17223-1 |
Carbon spring steel |
Wire; standard spring steel of high level |
| CrV |
1.8159 |
EN 10277-5 / DIN 17221 17222 |
Carbon spring steel |
As carbon steel, but for thick wire |
| C75 |
1.1248 |
EN 10132-4 / DIN 17222 |
Carbon spring steel |
Plate: standard non-stainless steel leaf spring steel |
| C100 |
1.1274 |
EN 10132-4 / DIN 17222 |
Carbon spring steel |
Plate: extra hard and wear-resistant non-stainless steel leaf spring steel |
| Material |
Type |
Winding |
Operating Temp. |
Heat Treatment After Winding |
| KI-B |
Spring Hard |
Cold |
Up to 200°C |
240°C for 1 hour + Air cooling (A.C.) |
| KI-C |
Spring Hard |
Cold |
Up to 200°C |
240°C for 1 hour + Air cooling (A.C.) |
