SAE 1020
Data verifiedSAE 1020 is a low-carbon steel for general engineering: easily machined, formed and welded, and the default material for low-load shafts, pins and seamless tube in carbon grade.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.18–0.23 |
| Mn | 0.30–0.60 |
| P | ≤0.040 |
| S | ≤0.050 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | 380–450 MPa (hot rolled) |
| Yield strength | ≥245 MPa |
| Density | 7.85 g/cm³ |
| Weldability | Excellent |
Heat treatment
Used as-rolled or normalized; can be case carburized for wear surfaces.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.0402 (C22) |
| aisi | 1020 |
| jis | S20C |
| gb | 20 |
Compare side by side: SAE 1020 vs 1045
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Shafts, pins, bushings, low-pressure seamless pipe and tube, welded structures.
Processing: Excellent weldability and machinability; limited hardenability — carburize if a hard surface is needed.
FAQ
- 1020 vs 1045?
- Carbon content: 1020 (0.20%) is soft, weldable and formable; 1045 (0.45%) is stronger and heat-treatable but needs weld preheat.
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Ask for a quotationVisit NasteelSource: SAE J403 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.