Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of 51crv4 hot roll steel flat bars for truck leaf springs in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
Products Description
51CrV4 Hot Roll Steel Flat Bars for Truck Leaf Springs
Top three in automotive industry by making advanced quality Spring Steels Flat Bars, Leaf Springs.
We make steel billets by our own plant, 1000-2000MT/Day. We can make steel as per your requirement.
Certificated by ISO9001: 2008. Highly Acclaimed Manufacturer and Exporter of Spring Steel Products.
Specification
1. Grades:
GB: 65Mn, 60Si2Mn, 60Si2MnA, 55CrMnA, 60CrMnA, 50CrVA; S45C
DIN. 60Si7, 55Si7, 60SiCr7, 55Cr3, 51CRV4;
JIS: SUP6, SUP7, SUP9, SUP9A, SUP10A.
SAE: 6150, 5160, 5160H, 9260, 1045
2. Width from 40mm to 150mm;
3. Thickness from 4mm to 35mm;
4. Length is customized (normally 4m-8m);
5. Other steel products are available.
Remarks
1. Package: 2.0-3.0 tons each bundle, packed with steel strips.
2. Min Order Qty: 20-26MT in one 20'' container
3. Delivery Time: 20-40 days
4. Price Terms: FOB, CFR, CIF
5. Payment Terms: L/C at sight of T/T against shipping documents
Sincerely welcome to visit our factory and pls feel free to contact with us.
We are anticipating your order soon.
| Standard | Material/ Grade | C | Si | Mn | Cr | V | P | S |
| ≤ | ||||||||
| DIN 17221 | 60SiCr7 | 0.57-0.65 | 1.50-1.80 | 0.70-1.00 | 0.20-0.40 | 0.030 | 0.030 | |
| 55Cr3 | 0.52-059 | ≤0.40 | 0.70-1.00 | 0.70-1.00 | 0.025 | 0.025 | ||
| 60Cr3 | 0.56-0.64 | 0.17-0.37 | 0.70-1.00 | 0.70-1.00 | 0.025 | 0.025 | ||
| 50CrV4 | 0.47-0.55 | 0.15-0.40 | 0.70-1.00 | 0.70-1.10 | 0.10-0.20 | 0.030 | 0.030 | |
| JIS G4801 | SUP6 | 0.55-0.65 | 1.50-1.80 | 0.70-1.00 | --- | 0.035 | 0.035 | |
| SUP7 | 0.55-0.65 | 1.80-2.20 | 0.70-1.00 | --- | 0.035 | 0.035 | ||
| SUP9 | 0.52-0.60 | 0.15-0.35 | 0.65-0.95 | 0.65-0.95 | 0.030 | 0.030 | ||
| SUP9A | 0.56-0.64 | 0.15-0.35 | 0.70-1.00 | 0.70-1.00 | 0.030 | 0.030 | ||
| SUP10 | 0.47-0.55 | 0.15-0.35 | 0.65-0.95 | 0.80-1.10 | 0.15-0.25 | 0.030 | 0.030 | |
| SAE J1268 | 9260/H | 0.55-0.65 | 0.70-1.20 | 0.65-1.10 | ≤0.2 | 0.040 | 0.030 | |
| 5155 | 0.50-0.60 | 0.15-0.35 | 0.65-1.10 | 0.60-1.00 | 0.040 | 0.030 | ||
| 5160/H | 0.55-0.65 | 0.15-0.35 | 0.65-1.10 | 0.60-1.00 | 0.040 | 0.030 | ||
| 6150 | 0.47-0.54 | 0.15-0.35 | 0.60-1.00 | 0.75-1.20 | ≤ 0.15 | 0.040 | 0.030 | |
Contact Us
FAQ
Q: Does your 51CrV4 flat bar suffer from surface decarburization?
A: We tightly control the heating atmosphere and rolling process to minimize decarburization. This is vital for leaf springs, as a soft decarburized surface layer severely reduces fatigue life. We can also supply the bars in a peeled or ground condition if zero decarb is required.
Q: Why choose 51CrV4 over standard 60Si2Mn for heavy truck springs?
A: 51CrV4 contains chromium and vanadium, giving it superior hardenability and toughness compared to 60Si2Mn. It performs much better in heavy-duty trucks and thick spring assemblies where high stress and shock loads are constant.
Q: What is the typical hardness required for truck leaf springs using this steel?
A: After quenching and tempering, the hardness is usually targeted between 40–47 HRC, depending on the spring design. The exact tempering temperature must be adjusted based on your required yield strength and desired fatigue cycle.
Q: Can your factory handle large volume orders for spring manufacturers?
A: Yes. We have a massive in-house production capacity of 1,000–2,000 MT per day for steel billets. We supply flat bars in widths of 40mm to 150mm, ensuring we can meet the continuous supply demands of automotive leaf spring producers.
Q: How do you pack the flat bars to prevent bending during sea freight?
A: We bundle them tightly with steel straps (2.0–3.0 tons per bundle) and secure them with wooden dunnage. For long bars (4–8 meters), we ensure the bundles are level in the container to prevent permanent deformation.
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