Description
SUS301-CSP (EN 1.4310 / AISI 301 / X10CrNi18-8) is YONGJIN’s precision cold-rolled stainless steel spring strip, engineered for high-strength springs, precision shrapnel and elastic components across automotive, electronics, battery and industrial applications.
How Foshan Yongjin Delivers Speed and Reliability
- ✔️ Monthly ready stock: 4,000-7,000 MT; CSP capacity: 15,000-20,000 MT
- ✔️ 72 hours dispatch from contract to loaded container
- ✔️ Fast export documentation + Form E certificate provided
- ✔️ Precision CSP coils ready for electronics, stamping, springs & automotive
Massive Ready Stock. Rapid Export Delivery.
Technical Specifications
Complies with JIS G4313, EN 10151, ASTM A666. Tolerances per DIN EN ISO 9445-P.
Thickness
0.05 to 1.5mm
Ready stock 0.1 to 1.5mm
Width
300 to 1220mm
Hardness
1/4H to SEH
Full CSP spectrum
Surface
Precision Finished
Ra 0.25 to 0.40 μm
Chemical Composition (%)
| Element | C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|---|
| SUS301-CSP | ≤0.15 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.00-18.00 | 6.00-8.00 |
Mechanical Properties
| Hardness | Tensile (MPa) | Yield (MPa) | Elongation (%) | HV |
|---|---|---|---|---|
| 1/2H | 1030-1320 | ≥510 | ≥9 | 310-390 |
| 3/4H | 1220-1520 | ≥760 | ≥5 | 370-450 |
| H | 1420-1720 | ≥960 | ≥3 | 430-510 |
| EH | 1620-1920 | ≥1160 | ≥2 | 490-570 |
| SEH | ≥1820 | ≥1350 | – | ≥550 |
In-House Precision Manufacturing
Compliance & Export Delivery
📄 Read Full Technical & Certification Breakdown (Blog)
Thanks to its rapid work-hardening behaviour, SUS301-CSP remains the first-choice spring material for engineers who need high strength and reliable elasticity in thin gauges.
Typical Applications of SUS301-CSP
Automotive
Leaf springs, seat belt mechanisms, spiral cable springs and retaining clips
Electronics
Membrane switches, vibration motors, connectors, dome switches and battery hardware
Industrial Springs
Compression, extension and torsion springs, shutter mechanisms
Precision Parts
Watch components, fasteners and stamped elastic components
Quick Hardness Selection Guide
| Condition | Best For |
|---|---|
| 1/2H | Deep drawing and moderate spring loads |
| 3/4H | Standard springs and clips with higher yield demand |
| FH (H) | High-stress flat springs and contact blades |
| EH | Maximum elasticity for precision shrapnel and micro springs |
Why Global Buyers Source SUS301-CSP from YONGJIN
- ✔️ Subsidiary of YONGJIN GROUP (SSE: 603995) with 10 production bases and stable monthly capacity
- ✔️ Proprietary 20-high reversible rolling mill delivering ±0.001mm thickness tolerance
- ✔️ RCS 2.0 & SCS ready: certified green production with minimum 90% post-consumer recycled content
- ✔️ Mix-size loading, fast documentation and Form E certificate for ASEAN markets
Export Packaging & Quality Documentation
Every SUS301-CSP coil is packed with maritime moisture-proof wrapping, anti-corrosion paper, steel strapping and wire bracing on reinforced pallets, loaded eye-to-sky or eye-horizontal according to vessel requirements. Our technical team provides free sample coils and stamping guidance before mass production, so your SUS301-CSP parts reach stable elastic performance from the first batch.
- ✔️ EN 10204 3.1 mill test certificate with chemistry and hardness results
- ✔️ SGS / BV third-party inspection accepted
- ✔️ Hardness and tolerance verification reports on request
Need a Quotation for SUS301-CSP?
📩 morgan@yongjinss.com | WhatsApp / Zalo +86 177 2277 5646
* Reference prices shown in search results are subject to daily LME nickel market fluctuations.
