304 Stainless Steel Extension Springs Reference Data: 13 catalog-backed reference configurations are available for sizing review. Use the ranges below to compare the starting envelope before submitting a drawing for final quotation.
- Wire diameter
- 0.6-4 mm (0.0236-0.1575 in)
- Outside diameter
- 3.5-36.88 mm (0.1378-1.452 in)
- Inside diameter
- 2.3-30.88 mm (0.0906-1.2157 in)
- Free length
- 15.86-212.59 mm (0.6244-8.3697 in)
- Spring rate
- 0.295-15.375 N/mm
- Maximum load
- 5.05-97.79 N
Catalog rows are reference configurations for custom design review. Final dimensions, loads, tolerances and material certifications are confirmed during quotation.
Products Represented in This Data
These rows show which product designs are represented in the reference data. Open the matching product for geometry, quotation inputs, application guidance and RFQ details.
- English-Hook Extension Springs3 matching rowsEnglish-Hook Extension Springs Application Guide
- German-Hook Extension Springs5 matching rowsGerman-Hook Extension Springs Application Guide
- Offset-Hook Extension Springs1 matching rowOffset-Hook Extension Springs Application Guide
- Round-Hook Extension Springs4 matching rowsRound-Hook Extension Springs Application Guide
Related Spring Design Guides
Use these guides to define the working dimensions, loads and quotation requirements.
Engineering Material Reference
304 Stainless Steel extension springs reference data combines the published material properties with matching rows from the Spring Finder catalog. Use the product links in the table for product-specific design and quotation details.
| Primary grade | AISI 304 / UNS S30400 |
|---|---|
| Standards | ASTM A313 Type 304 spring wire. Do not treat EN 1.4310 as a direct 304 equivalent; confirm the required EN / JIS / GB grade and temper on the drawing or RFQ. |
| Corrosion behavior | good general corrosion resistance for indoor, light outdoor and clean industrial environments |
| Temperature note | screening range -200 to 250 C, to be confirmed against final stress and environment |
| Tensile strength | 1345-2365 MPa |
| Elastic modulus | 185-190 GPa |
| Shear modulus | 71-73 GPa |
| Density | 7.90 g/cm3 |
Matching Reference Configurations
| Model | Product | Wire / thickness | OD | ID | Free length | Rate (N/mm) | Material | Max load (N) |
|---|---|---|---|---|---|---|---|---|
| SE-060-0035-0159-0428 | German-Hook Extension Springs | 0.6 mm | 3.5 mm | 2.3 mm | 15.86 mm | 2.518 | 304 Stainless Steel | 10.9 |
| SE-060-0035-0224-0556 | Round-Hook Extension Springs | 0.6 mm | 3.51 mm | 2.31 mm | 22.36 mm | 1.851 | 304 Stainless Steel | 11.57 |
| SE-080-0057-0259-0568 | German-Hook Extension Springs | 0.8 mm | 5.66 mm | 4.06 mm | 25.93 mm | 1.412 | 304 Stainless Steel | 6.68 |
| SE-120-0132-0582-0464 | English-Hook Extension Springs | 1.2 mm | 13.25 mm | 10.85 mm | 58.25 mm | 0.295 | 304 Stainless Steel | 5.05 |
| SE-150-0103-0729-0491 | Offset-Hook Extension Springs | 1.5 mm | 10.26 mm | 7.26 mm | 72.94 mm | 1.956 | 304 Stainless Steel | 35.06 |
| SE-180-0095-0394-0520 | Round-Hook Extension Springs | 1.8 mm | 9.48 mm | 5.88 mm | 39.36 mm | 15.375 | 304 Stainless Steel | 97.79 |
| SE-200-0160-0375-0513 | German-Hook Extension Springs | 2 mm | 16.05 mm | 12.05 mm | 37.49 mm | 5.026 | 304 Stainless Steel | 21.29 |
| SE-200-0167-0524-0589 | English-Hook Extension Springs | 2 mm | 16.66 mm | 12.66 mm | 52.43 mm | 2.592 | 304 Stainless Steel | 18.62 |
| SE-250-0156-1393-0466 | English-Hook Extension Springs | 2.5 mm | 15.62 mm | 10.62 mm | 139.28 mm | 3.293 | 304 Stainless Steel | 86.97 |
| SE-250-0159-1530-0443 | Round-Hook Extension Springs | 2.5 mm | 15.93 mm | 10.93 mm | 153.04 mm | 2.844 | 304 Stainless Steel | 93.16 |
| SE-250-0257-0489-0465 | Round-Hook Extension Springs | 2.5 mm | 25.7 mm | 20.7 mm | 48.91 mm | 3.854 | 304 Stainless Steel | 27.81 |
| SE-300-0369-1752-0437 | German-Hook Extension Springs | 3 mm | 36.88 mm | 30.88 mm | 175.24 mm | 0.383 | 304 Stainless Steel | 18.18 |
| SE-400-0367-2126-0460 | German-Hook Extension Springs | 4 mm | 36.74 mm | 28.74 mm | 212.59 mm | 1.502 | 304 Stainless Steel | 57.41 |
Using This Material Data
cold forming, stress relief and passivation are common; spring temper and magnetic response must be confirmed by grade and cold work
Need to choose between grades? Material selection belongs in the Materials section rather than this data page. Open Stainless Steel Spring Materials →
CustomSprings Engineering Catalog
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Frequently Asked Questions
Can CustomSprings manufacture springs in 304 Stainless Steel?
The material is included in the CustomSprings material library for RFQ screening. Final feasibility depends on wire or strip form, size, heat treatment, load, environment and quantity.
Does the material page guarantee certified properties?
No. The material values are engineering reference data. Certified properties or test reports must be specified during production quotation.
What if there are no matching reference rows?
Use the RFQ form with your drawing and application data. The material can still be reviewed as a made-to-drawing option.