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The strength, durability and flexibility of high carbon steel make it suitable for many high strength applications. our pre-tempered blue spring steel product is custom processed and finished in our facilities to meet your production need
The particular AISI/SAE high carbon steels we offer are used by the automotive, blade, and aerospace industries, for example, and in the manufacture of products like blades, power springs, saws, automotive parts, washers, and more

| Grade | Chemical Composition | |||||||
|---|---|---|---|---|---|---|---|---|
| JIS | AISI/SAE | C | Si | Mn | P(Max) | S(Max) | Cu(Max) | Cr(Max) |
| S50C | 1050 | 0.47~0.53 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |
| S55C | 1055 | 0.52~0.58 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |
| S60C | 1060 | 0.55~0.65 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |
| S65C | 1065 | 0.60~0.70 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |
| S70C | 1070 | 0.65~0.75 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |
| S75C | 1075 | 0.70~0.80 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |
| S80C | 1080 | 0.75~0.85 | 0.15~0.35 | 0.60~0.90 | 0.030 | 0.035 | 0.300 | 0.200 |