51CrV4 Spring Steel Sheet is great if you need something tough. It's flat steel that's already been treated to be strong. This stuff can take a lot of force, won't break easily, and lasts a long while. It's made with chromium and vanadium. Plus, it follows rules set by Europe (EN 10132-4). It's good for springs and other parts that have a lot of pressure on them. They keep a close watch on what goes into it. Carbon, chromium, and vanadium make it really hard and strong. They make it just right with hot or cold rolling. Then they heat and cool it in a special way. This makes the steel strong but also flexible.
Product Details




Specifications & Technical Parameters
| Standards | EN 10132-4, DIN 17221 |
| Common Designations | 51CrV4, 1.8159 |
| Thickness | 0.5mm - 5.0mm |
| Width | Up to 1300mm |
| Length | Coil or cut-to-length |
| Surface Finish | Cold-rolled bright, annealed, or as required |
| Tensile Strength | 1250-1500 MPa |
| Yield Strength(0.2% offset) | ≥1100 MPa |
| Elongation | ≥7% |
| Hardness | 380-460 HB |
Typical chemical composition(Typical)
| C | Si | Mn | P | S | Cr | V |
| 0.47-0.55% | 0.15-0.35% | 0.80-1.10% | ≤0.025% | ≤0.025% | 0.90-1.20% | 0.10-0.25% |
Features & Advantages
Increased Fatigue Resistance for Longer Service Life
Adding a bit of vanadium to 51CrV4 steel makes it stronger against metal fatigue. When you heat it, the vanadium forms tiny, tough carbides that hold the grain boundaries in place. This stops them from getting too big, so the material can take a lot of stress before breaking. Basically, this means stuff lasts longer, breaks less often, and you don't have to spend as much time and money fixing it.
Excellent hardenability for consistent performance in thick sections.
51CrV4 steel has a lot of chromium. It gets very hard when cooled in oil. This is good for thick plates or big pieces. Regular carbon steel can't do this. The material is the same all the way through. You don't get weak spots. It's strong all over. This makes designing things easier.
Balanced Toughness to Withstand Impact and Overload
Strong materials can be brittle sometimes. With 51CrV4, careful tempering helps to adjust the microstructure. Now, you have both strength and toughness working together. Parts will be able to handle impacts or heavy loads. The product is now stiffer. This makes it safer.
Consistent Flatness and Surface Integrity for Precision Manufacturing
51CrV4 spring steel sheets stay really flat. The surface is consistently smooth, which is super important for automated production. It makes stamping, bending, and coiling way easier. A smooth, flawless surface helps prevent metal fatigue because no imperfections mean fewer stress points, so cracks are less likely to form when there's repeated stress.

Our Strength

We're good at dealing with 51CrV4 Spring Steel Sheet because we really know our stuff and keep things running smoothly. For years, we've teamed up with the best mills. Thus, we are able to get materials when needed. This means good raw stuff comes without stop.
Our own teams checks the quality of each batch. They look close at what's in it and how strong it is. Every sheet is up to what customers want.
We get stuff delivered on time. So, your production keeps going. We don't just supply stuff. We also jump in to help with techie stuff. We want your projects to kill.
Applications

Industrial Machinery and Tools

Automotive Industry

Aerospace and Defense
Why Choose Us?
At Jiangsu CunRui Metal Products Co., Ltd., we get that standard solutions sometimes don't cut it. We're good at being flexible and making sure you get exactly what you need.
01
Precision Cutting and Custom Size
We cut stuff to the exact size you need. Our slitting and shearing will get those 51CrV4 plates shaped just how you want them. This way, we don't waste as much material. Stuff goes straight into making your product as soon as it gets here. So things get done faster, and money is saved.
02
Customized heat treatment process
We can tweak the heat treatment to fit what your project needs. Our team will dial in the hardness you want, adjusting the tempering temps. If you need it more formable, we can anneal it exactly where you need it. The whole plan will be made just for your project.
03
Reliable packaging and complete documents
The packaging is tough, so it should arrive at your factory without damage. We've included the technical data sheets, and the material certificates guarantee the quality.

FAQ
Q: What is the main difference between 51CrV4 and common 65Mn spring steel?
A: 51CrV4 is tougher and hardens better than 65Mn because it contains chromium and vanadium. This makes it a better choice for thicker materials and situations where there's a lot of stress.
Q: Can 51CrV4 Spring Steel be welded?
A: Yep, it's weldable with methods like TIG or MIG. But, to get the strength back in the area that gets hot and keep it from cracking, you should warm it up before and after welding.
Q: What are your standard delivery times for this product?
A: Usually, if you're ordering standard stuff, we ship it out in 10-15 business days. If you need something special like custom heat treatment or a really big order, we'll let you know exactly when it'll ship when you confirm your order.
Q: Do you provide material certification?
A: Yep, every shipment comes with a Material Test Certificate (MTC) – like an EN 10204 3.1 thing – that says the stuff inside meets all the chemical and mechanical rules.
Q: What is the maximum width you can supply?
A: We usually have sheets up to 1300mm wide. If you need wider ones, just get in touch to chat about what you need.

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