60Si2CrA
Data verified60Si2CrA is the chromium-upgraded silicon spring steel of GB/T 1222: adding ~1% Cr to the 60Si2Mn base raises hardenability and temper resistance for heavier or hotter-running springs.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.56–0.64 |
| Si | 1.40–1.80 |
| Mn | 0.40–0.70 |
| P | ≤0.035 |
| S | ≤0.035 |
| Cr | 0.90–1.20 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Hardness (Q&T) | 45–52 HRC typical |
| Density | 7.85 g/cm³ |
| Fatigue performance | Above 60Si2Mn (Cr addition delays temper softening) |
Heat treatment
Quench 860–880 °C oil; temper 420–500 °C class to spring hardness.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | 9262 (near) |
| jis | SUP12 (near) |
| gb | 60Si2CrA (GB/T 1222) |
Compare side by side: 60Si2CrA vs 9260
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Heavy leaf and coil springs, torsion bars, valve springs, stabilizer bars.
Processing: As silicon spring steels generally: protect against decarburization; shot-peen for fatigue life.
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Ask for a quotationVisit NasteelSource: GB/T 1222 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.