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FORGE-Roll Sleeve
ETERNAL
AISI H13 steel (China standard 4Cr5MoSiV1, German standard 1.2344, Japanese standard SKD61) is a typical hot work die steel. Due to its excellent resistance to thermal fatigue, thermal cracking, high wear resistance, high temperature strength and toughness balance, it has become a high-quality roll sleeve material in the fields of hot rolling, hot extrusion and special rolling.
Element | Content | Function | Feature |
C | 0.32~0.45% | Carbon ensures strength and hardness |
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Cr | 4.75~5.50% | Chromium improves hardenability, wear resistance, and oxidation resistance | |
Mo | 1.10~1.75% | Molybdenum enhances high temperature strength, resistance to tempering softening, and resistance to thermal fatigue | |
Si | 0.80~1.20% | Silicon improves antioxidant and thermal strength | |
V | 0.80~1.20% | Vanadium refines grain size, form wear-resistant carbides, and improve thermal stability | |
Mn | 0.20~0.50% | Manganese improves hardenability | |
P/S | ≤0.03% | Phosphorus/Sulfur control impurities to ensure purity |
Condition | Item | Typical |
Annealing | Hardness | 192-229 HB |
Quenching and Tempering | 44-52 HRC | |
Tensile Strength | 1200-1820 MPa | |
Yield Strength | 1000-1550 MPa | |
Elongation | 10-15% | |
Reduction of area | 45-55% | |
Lateral V-shaped impact | 16-82 J | |
Hardening layer(according to quenching process) | 15-30mm |
We always focus on customers, pay attention to their needs, provide high-quality products and excellent services to meet their expectations.
ETERNAL chooses premium ESR raw material to reduce hydrogen content and non‑metallic inclusions and enhance steel cleanliness.
ETERNAL applies open‑die forging to refine grains, eliminate segregation, ensure microstructure homogeneity and improve mechanical properties
Post‑forging treatment starts with slow cooling to prevent cracking, followed by spheroidizing annealing to reduce hardness for easier machining.
Quenching and tempering treatment is performed to achieve the final mechanical properties.
Application area | Specific purpose |
Hot rolling | Finishing Work Roll for Hot Continuous Rolling；Work Roll for Hot Strip Mill；Hot‑Rolled Roll for Section Steel，etc. |
Nonferrous metal rolling | Aluminum / Copper Foil Mill; Battery Foil Mill; Aluminum Profile Mill,etc. |
Special steel rolling | Rolling of superalloys and special steels,etc. |
Forging equipment | Hot‑forging Die Roll; Straightening Roll; Hot Leveling Roll,etc |
Our goal is to work closely with partners to help customers achieve greater success in multiple fields.
We collaborate with reliable logistics partners to provide efficient logistics and delivery services.
We provide comprehensive after-sales service, providing resolutions of any issues and free maintenance and replacement of parts during the warranty period.
We have a professional technical team that can provide technical consultation and support to customers.
From raw materials to the production process and before leaving the factory, all performance indicators are strictly tested, and the professional QC team controls according to the process.
