440C stainless steel wire comes as a high carbon martensitic stainless steel grade. It works well for jobs that need strong hardness, good wear resistance, and solid corrosion stability. They make this material following ASTM, JIS, and other international standards. You see it often in precision parts, industrial tools, and components facing friction or mechanical stress. Our version of 440C SS wire gets produced through controlled melting, hot rolling, wire drawing, and heat treatment steps. That gives even mechanical properties all through the coil or spool.
The chemical makeup usually has plenty of carbon along with chromium. This lets the wire hit high hardness levels after heat treatment. Its fine microstructure and clean inner quality suit it for uses demanding exact dimensions and protection from surface wear. With steady metallurgical actions and close size tolerances, 440C SS wire turns into a go to choice for folks making bearings, valves, cutting tools, springs, and precise mechanical setups.
Product Details
Specifications & Technical Parameters
| Standards | ASTM A580,JIS G4303 |
| Diameter | 0.20–8.00 mm |
| Wire form | Coil, spool, or straight-cut lengths |
| Surface finishes | Bright, matte, polished, or custom finish upon request |
| Tensile strength | 800–1200 MPa (depending on condition) |
| Hardness | Up to 58–60 HRC |
| Elongation | 8–15% |
Typical chemical composition(Typical)
| Carbon | Chromium | Manganese | Silicon | Phosphorus | Sulfur |
| 0.95–1.20% | 16.0–18.0% | ≤1.00% | ≤1.00% | ≤0.040% | ≤0.030% |
Features & Advantages
Extreme hardness.
After standard heat treatment, the hardness hits HRC 58 to 62 pretty easily. You can use it for creating sharper cutting edges that last longer and distort less. It also builds wear resistant parts. All this boosts the overall performance of your end products in a big way.
Exceptional wear resistance life
The high hardness and high carbon in this chromium steel give it top notch wear resistance. In things like bearings, guides, and molds where friction happens a lot, it extends the life of parts. That cuts down on replacement time and downtime. In the end, customers save on long term maintenance and total ownership costs.
The golden balance between strength and corrosion resistance
It matches tool steel in hardness and strength. At the same time, it keeps the natural rust and corrosion resistance from stainless steels. Your products can deal with tough spots needing strength. They also handle humidity, sweat, or light chemicals. This mixes durability with real world use perfectly.
Extensive post-processing adaptation
They supply the material in a soft annealed state most times. That fits right for deep processing, accurate grinding, and forming. After you finish all the machining, a quick final heat treatment unlocks its best traits. It really streamlines the whole manufacturing setup.
Our Strength
Jiangsu CunRui Metal Products Co., Ltd. focuses on giving customers real, solid solutions. We skip the overblown promises. Our main strengths lie in steady quality control, managed production steps, and a service approach that puts actual customer needs first.
Consistent manufacturing capabilities.
Our wire drawing setups deliver uniform surface finish, size accuracy, and mechanical traits. They all meet industry benchmarks without fail.
Stock availability.
We keep various standard sizes of 440C SS wire ready in stock. This lets us ship out fast for rush orders.
Quality control at all stages.From the melting phase right through to final checks, every batch goes through chemical and mechanical tests. That ensures reliable performance every time.
Experience serving varied sectors.
We understand our customers' needs in tooling, bearings, machinery, and precision manufacturing, so we can develop material solutions that meet their production goals.
Applications
Precision bearings and mechanical components
Springs exposed to demanding conditions
Aerospace and instrumentation parts
Why Choose Us?
- Customized wire diameters and tolerances
We offer custom diameters and tight tolerances ideal for precision machining, forming, and spring manufacture.
- Heat treatment available upon request.
Customers can request wire in annealed, hardened, or tempered states to suit their manufacturing process.
- Flexible packaging choices.
Wire can be transported in spools, coils, or straight rods. We also provide packing solutions to safeguard the surface finish during transportation.
- Technical support
Our staff assesses customer drawings, usage environments, and processing needs to recommend the best 440C SS wire condition.
- Stable supply for long-term projects.
We keep popular diameters in stock on a regular basis and may enable scheduled deliveries for large-volume buyers.
FAQ
Q: Can I get a small quantity for testing?
A: Yes, sample quantities or small trial orders are offered to new customers.
Q: Do you offer heat-treated wire?
A: We can supply annealed, toughened, or tempered 440C SS wire based on your specifications.
Q: What is the normal lead time?
A: Typically 7-15 days, depending on inventory and processing requirements.
Q: Can you make special diameters?
A: Yes, customized diameters and tolerances can be created based on your specifications.
Q: Do you offer mill test certificates?
A: Yes, all shipments include MTC for chemical and mechanical properties.
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