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Help CenterMold Steel H13r Round Steel, Heat-resistant H13esr Electroslag Round Bar, Can be Cut and Sold Retail From 16 to 600, Guaranteed for Flaw Detection
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Industry Pain Points and Solutions
In the field of hot - working die processing, customers have long faced core pain points such as short die service life, easy softening at high temperatures, thermal fatigue cracking, and sudden failure due to internal defects in the material. Traditional die steels often have insufficient smelting purity, serious carbide segregation, and low transverse impact toughness. When subjected to rapid heating and cooling cycles, they develop cracks or chipping in advance, seriously affecting production efficiency and increasing die - changing costs. Liaocheng Jincheng Yangming Special Steel Co., Ltd., with years of experience in special steel business, deeply understands these industry challenges and has launched Die Steel H13R Round Steel and H13ESR Electroslag Round Bar series products in a targeted manner.
H13R is an improved version of H13. By optimizing the chemical composition and heat treatment process, its thermal stability and resistance to tempering softening are significantly improved. H13ESR uses electroslag remelting (ESR) technology, which greatly reduces the sulfur content, non - metallic inclusions, and gas content in the steel, making the material density close to the theoretical value and reducing the internal defect rate to an extremely low level. The company is located in Liaocheng City, Shandong Province - an important domestic special steel distribution center. Relying on the advantages of the regional industrial cluster, it can provide diameters from 16 - 600mm in a full range of specifications and supports retail sales with cutting to any length. Each round bar undergoes ultrasonic flaw detection before leaving the factory to ensure there are no fatal defects such as cracks, white spots, and shrinkage cavities, truly allowing users to "buy with confidence and use with peace of mind".
Working Principles and Mechanisms
The excellent performance of H13ESR electroslag round bars comes from its special smelting and processing processes:
1. Electroslag Remelting (ESR): Using a common H13 steel ingot as a consumable electrode, it is remelted in the slag layer. When the molten droplets pass through the slag layer, they are deeply desulfurized and non - metallic inclusions are removed. At the same time, the molten steel is directionally solidified in the water - cooled mold, eliminating central porosity and segregation.
2. Homogenizing Annealing: Keeping the temperature at around 1250℃ for a long time to fully dissolve and evenly distribute the carbides, providing a structural basis for subsequent quenching.
3. Multi - directional Forging: Using the upsetting + drawing process to break up the network carbides, refine the grains, and obtain excellent isotropic mechanical properties.
4. Ultrasonic Flaw Detection: According to GB/T 4162 or SEP 1921 standards, each round bar is subjected to 100% ultrasonic testing to ensure reliable internal quality.
Product Features and Technical Parameters
- Excellent Heat - Resistance Performance: It can still maintain a relatively high hardness (≥40HRC) at a high temperature of 600℃, and its thermal fatigue resistance life is more than 30% higher than that of ordinary H13.
- High purity: The ESR process makes the sulfur content in the steel ≤0.002% and the oxygen content ≤15ppm. The non-metallic inclusions are fine and flat, reducing the early fatigue sources of the mold.
- Good hardenability: It can be hardened to a φ600mm cross-section by air cooling, with uniform core hardness, suitable for large molds.
- Flexible and customizable dimensions: The in-stock products cover diameters from 16mm to 600mm. Sawing and cutting to length are supported, and urgent orders can be shipped on the same day.
- Inspection guarantee: Each round bar is provided with a qualified inspection report, complying with the JB/T 8420-2008 standard.
| Item | Typical parameters |
| Grade | H13ESR / H13R |
| Delivery hardness | ≤229HB (annealed state) |
| Quenching hardness | 54-58HRC (quenching + tempering) |
| Density | 7.85 g/cm³ |
| Thermal expansion coefficient (20-600℃) | 12.5×10⁻⁶ /℃ |
| Thermal conductivity (200℃) | 28 W/(m·K) |
| Typical chemical composition (Cr/Mo/V) | 5.0/1.5/1.0 (mass fraction %) |
The above parameters are based on the average value of actual production batches and comply with the ASTM A681 and GB/T 1299 standards. Users can choose the best heat treatment process according to the mold working conditions, and Liaocheng Jincheng Yangming Special Steel Co., Ltd. can provide process suggestions.
Advantages and trust endorsement
Liaocheng Jincheng Yangming Special Steel Co., Ltd. adheres to the business philosophy of "seeking truth from facts and honesty as the foundation" and has accumulated a good reputation in the special steel circle. The company has long-term and stable special steel procurement channels to ensure the regular source of raw materials; it is equipped with large-tonnage hydraulic forging machines, continuous annealing furnaces and high-precision band saw cutting equipment, with a daily output of round steel of more than 50 tons. All H13ESR electroslag round bars come with a factory warranty certificateAnd third-party flaw detection reports (if needed).
Among our cooperative customers, our products are widely used in scenarios such as aluminum die-casting molds, copper extrusion molds, and hot forging molds. Many mold manufacturers have reported that the mold life has been improved by 20%-50%. We are located in the core area of Liaocheng Special Steel Market, with convenient transportation, and can ship goods across the country. We suggest that you give priority to the balance between heat resistance level and impact toughness when selecting materials. H13ESR is especially suitable for precision molds with strict internal quality requirements. If you have specific size requirements or higher requirements for flaw detection levels, welcome to contact our technical sales consultants. We will provide you with one-on-one material selection advice and free sample services.
FAQ
Q1: What's the difference between H13R and ordinary H13?
A1: H13R fine-tunes the Mo and V contents on the basis of H13 and optimizes the heat treatment window, making it have higher tempering resistance stability. Its hardness retention ability is improved by about 20% under the working condition of 500-600℃, and it is more suitable for harsh environments such as continuous die-casting.
Q2: What's the essential difference between H13ESR electroslag round bar and ordinary electric furnace steel?
A2: Electroslag remelting can reduce the total amount of inclusions in the steel by more than 50%, significantly reduce the gas content, and improve the transverse impact toughness by 40%-60%. For large-section molds, ESR materials can effectively avoid the problem of unqualified flaw detection caused by center segregation.
Q3: Can the core performance of a round bar with a diameter of 600mm be guaranteed?
A3: Yes. Through the electroslag remelting + multi-directional forging + reasonable annealing process, the hardness difference from the edge to the center of the φ600mm round bar can be controlled within 3HRC, meeting the requirements of large modules. We provide furnace samples and test data.
Q4: What's the standard for flaw detection guarantee? Can the flaw detection level be specified?
A4: We default to implement according to GB/T 4162 Class B, that is, the equivalent of a single defect ≤φ2mm. It can also be implemented according to standards such as N AEC and SEP 1921 as required by customers, with a small additional fee. The flaw detection report is issued by a third party or our certified personnel.
Q5: Does it support small-batch retail cutting? What's the minimum purchase quantity?
A5: It supports retail cutting of any length. There is actually no limit to the minimum order quantity, but if it is less than one meter, it will be priced by the root. The 16-300mm specifications are in stock, and can be cut and shipped on the same day.
Q6: Does the material need to be annealed again before processing?
A6: The supply state of Liaocheng Jincheng Yangming Special Steel Co., Ltd. is standard annealing (≤229HB), which can be directly subjected to rough machining. If nitriding or PVD coating is used, it is recommended to first quench and temper to the working hardness. Our company can provide products in annealed or quenched and tempered states for delivery.
Q7: Which typical mold types is this material suitable for?
A7: It is especially suitable for aluminum alloy die-casting molds, copper alloy extrusion molds, hot shear blades, hot forging punches, mandrels, etc. For working conditions with a working temperature of 600-800℃, it is recommended to choose heat-resistant steel with a higher alloy content.
Q8: What is the return mechanism? What if the flaw detection fails?
A8: We promise "guaranteed flaw detection", that is, if the third-party re-inspection after the customer receives the product finds excessive defects (not caused by machining), a full refund or replacement will be provided. Customers who have cooperated for more than ten years enjoy the service of pre-payment compensation.
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