25
Data verified25 is the GB/T 699 carbon steel between 1020 and 1030 in carbon content, matching AISI 1025 / JIS S25C. A general machinery steel for lightly loaded shafts and fasteners.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.22–0.29 |
| Si | 0.17–0.37 |
| Mn | 0.50–0.80 |
| P | ≤0.035 |
| S | ≤0.035 |
| Cr | ≤0.25 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | ≥450 MPa (GB/T 699 reference, normalized blank) |
| Yield strength | ≥275 MPa (reference) |
| Density | 7.85 g/cm³ |
| Weldability | Good |
Heat treatment
Normalize; small sections can be water-quenched and tempered for higher strength.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.0406 (C25) |
| aisi | 1025 |
| jis | S25C |
| gb | 25 (GB/T 699) |
Compare side by side: 25 vs 1025
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Shafts, bolts, nuts, pins, agricultural machinery parts.
Processing: Machines and welds readily; modest hardenability in thin sections only.
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Ask for a quotationVisit NasteelSource: GB/T 699-2015 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.