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Help CenterHigh Hardness S45C Carbon Steel Plate Medium Carbon Steel Flat Bar For Machinery Parts Processing
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Wuxi Yansheng Technology Co., Ltd. proudly presents our premium High Hardness S45C Carbon Steel Plate and Medium Carbon Steel Flat Bar, specifically engineered for precision machinery parts processing. With over seven years of manufacturing expertise and an annual export value exceeding US$50 million, we deliver consistent quality and reliable supply to global markets. Our S45C steel offers an optimal balance of strength, hardness, and machinability—making it the preferred choice for demanding applications in automotive, construction, and general engineering. Each plate and bar undergoes strict quality control to ensure dimensional accuracy and uniform mechanical properties, helping you reduce waste and improve production efficiency.
Let’s explore the key features that set our S45C carbon steel flat bar apart from conventional alternatives:
- High Hardness & Strength: With a typical annealed hardness of HB 170–210 and the ability to be quenched and tempered to HRC 50+, this material provides excellent wear resistance for heavy-duty machinery parts.
- Superior Machinability: The medium carbon composition (0.42–0.48% C) ensures clean cutting, drilling, and milling—ideal for producing gears, shafts, pins, and bushings.
- Consistent Dimensional Tolerance: Our precision rolling process guarantees thickness tolerance within ±0.1mm and width tolerance within ±0.5mm, minimizing post-processing adjustments.
- Versatile Sizes & Surface Options: Available in thicknesses from 3mm to 200mm, widths from 10mm to 1500mm, and lengths up to 12 meters. Surface finishes include black, pickled, oiled, or customized upon request.
- Certified Raw Materials: All plates and bars are sourced from ISO9001-certified mills, with full chemical composition and mechanical property test reports provided.
| Specification | Details |
|---|---|
| Standard Grade | S45C (JIS G4051) / AISI 1045 |
| Carbon Content | 0.42% – 0.48% |
| Tensile Strength | ≥ 600 MPa (as rolled) |
| Yield Strength | ≥ 350 MPa |
| Elongation | ≥ 20% (in 50mm) |
| Hardness (Annealed) | HB 170 – 210 |
| Heat Treatment | Normalizing, Quenching & Tempering (customizable) |
| Surface Finish | As-rolled, black, pickled & oiled, or shot-blasted |
Why choose our S45C carbon steel flat bar for your machinery parts? The combination of moderate carbon content and precise heat treatment allows you to achieve the desired hardness while maintaining core toughness. This material resists deformation under heavy loads, extends the service life of tools and components, and simplifies downstream processing. Whether you need standard blanks or custom-cut pieces with CNC-ready dimensions, our flexible production line can accommodate orders of any scale—from small batches to full container loads.
Backed by Wuxi Yansheng Technology Co., Ltd., a manufacturer with 101–200 skilled employees and a factory area spanning 1,000–3,000 square meters, we have the capacity to fulfill contracts worth up to US$100 million annually. Our products are exported to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East, shipped from major ports including Tianjin, Shanghai, Qingdao, and Ningbo. With certifications such as ISO9001, ISO14000, and OHSAS18001 (as per our company profile), we maintain rigorous quality and environmental management systems. Every shipment is accompanied by mill test certificates and inspection reports to guarantee traceability. For over seven years, we have earned the trust of clients in the machinery, automotive, and construction sectors—experience the difference of working with a dedicated partner. Contact us today for a quote or technical consultation!
Frequently Asked Questions
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Q: What is the difference between S45C and AISI 1045?
A: S45C is the Japanese JIS standard designation, while AISI 1045 is the US equivalent. The chemical composition and mechanical properties are nearly identical, making them interchangeable for most applications. We can supply either standard upon request. -
Q: Can you provide heat-treated (hardened) plates or bars?
A: Yes, we offer quenching and tempering (Q&T) services to achieve various hardness levels, typically up to HRC 50–55. Please specify your required hardness range during ordering. -
Q: What are the typical tolerances for thickness and width?
A: For our standard flat bars, thickness tolerance is ±0.1mm for sizes up to 25mm, ±0.15mm for 25–50mm, and ±0.2mm for thicker plates. Width tolerance is ±0.5mm for widths under 500mm, and ±1.0mm for wider sizes. Custom tolerances are negotiable. -
Q: Do you offer cut-to-length or laser-cutting services?
A: Absolutely. We can provide custom-cut lengths based on your drawing, as well as CNC laser cutting for complex shapes. Additional processing like drilling, tapping, and milling can also be arranged. -
Q: How is the surface protected to prevent rust during shipping?
A: Standard steel is supplied in black finish (mill scale). For corrosion protection, we can apply oil coating, varnish, or rust-proof paper wrapping. For long-distance sea freight, we recommend the pickled & oiled option. -
Q: What is your minimum order quantity (MOQ)?
A: Our regular MOQ is 5 metric tons per size. However, for trial orders or sample pieces, we can offer smaller quantities at a slightly higher unit price. Contact our sales team for details. -
Q: Do you provide material test certificates?
A: Yes, each batch comes with a mill test certificate (MTC) showing chemical composition and mechanical properties. Third-party inspection (e.g., SGS, BV) is also available at the buyer’s cost. -
Q: How long does delivery usually take?
A: For stock sizes, we can ship within 7–15 days after order confirmation. For custom sizes or heat-treated materials, lead time is typically 15–25 days depending on quantity and processing requirements.
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