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ESR electric slag remelting: low impurities, fine and dispersed inclusions, high material purity.
Forging densification: Good mechanical isotropy, significantly improved transverse toughness, and less prone to angular collapse and cracking.
Strong alternating cold and hot performance: resistant to thermal fatigue and cracking, suitable for long-term high-temperature cycling conditions.
Processing and heat treatment stability: The annealed hardness is uniform, and the subsequent quenching and tempering deformation is small.
China: 4Cr5MoSiV
Germany: 1.2343
USA: H11 ESR
Japan: SKD6
element | C | Si | Mn | Cr | V | Mo | S | P |
scope | 0.33~0.43 | 0.80~1.25 | 0.2~0.5 | 4.75-5.50 | 0.3~0.6 | 1.1~1.6 | ≤0.005 | ≤0.015 |
Performance items | unit | Annealed and softened supply status | Quenching + Tempering Standard Use Condition | Remark |
Brinell hardness HB | — | ≤235 HB | — | Cutting Machining Reference |
Rockwell hardness HRC | — | — | 48–52 HRC | Conventional hot working conditions |
Tensile strength Rm | MPa | 750–850 | 1450–1600 | Excellent high temperature strength and toughness |
Yield strength Rp0.2 | MPa | 450–550 | 1250–1400 | Deformation resistance |
Elongation after fracture A | % | 18–25 | 8–12 | Resilience Index |
Reduction of area Z | % | 60–70 | 35–45 | Crack resistance |
Impact energy KV (at room temperature) | J | ≥40 | ≥25 | No gap/Charpy V-shape |
coefficient of thermal expansion | ℃ | 11.5–12.3 (20~500℃) | — | Hot and cold alternation adaptation |
thermal conductivity | W/(m·K) | 24–28 (normal temperature) | — | Heat dissipation and resistance to thermal cracking |
Thickness: 100-650mm
Width: 160-1200mm
Heating: Preheat in sections, with an initial forging temperature of 1100-1150 ℃ and a final forging temperature of ≥ 850 ℃, to prevent low-temperature forging cracking.
Forging: Multi directional upsetting and elongation, forging ratio ≥ 4, crushing inclusions, refining grains, eliminating component segregation, and making the steel plate structure dense and uniform.
Excellent toughness, impact resistance, heat shock resistance, oxidation resistance, and minimal thermal deformation; Heat treatment has minimal distortion and good hardenability.
Hot stamping/forging molds: Metal hot forging, warm forging molds, forging die inserts, high temperature resistance, collapse resistance, and good toughness.
Die casting industry: Small and medium-sized die casting molds, cores, and top pins for aluminum, magnesium, and zinc alloys, with resistance to thermal cracking and fatigue.
Extrusion molding: aluminum and copper hot extrusion molds, extrusion cylinder liners, punches, suitable for high temperature and high pressure working conditions.
Plastic and rubber molds: High temperature modified plastic and fiberglass reinforced molds, with excellent corrosion resistance and polishing properties.
General hot work accessories: hot cutting knives, high-temperature fixtures, heat treatment fixtures, high-temperature resistant mechanical parts.
