5XHM Tool Steel

5XHM Tool Steel Chemical Composition

The composition of 5XHM is designed with the goal of balancing strength and toughness, with the following key element ratios:

1. Carbon (C): 0.50-0.60% → Secures base hardness and wear resistance.
2. Nickel (Ni): 1.40-1.80% → core alloying element that significantly improves toughness and hardenability.
3. Chromium (Cr): 0.50-0.80% → enhances corrosion resistance and high temperature strength.
4. Molybdenum (Mo): 0.15-0.30% → refine the grain, inhibit temper brittleness.
5. Manganese (Mn): 0.50-0.80%, silicon (Si): 0.1-0.40% → deoxidation solid solution strengthening.
6. Impurity control: sulfur (S) ≤ 0.030%, phosphorus (P) ≤ 0.030% → reduce the tendency to thermal embrittlement.

5XHM Tool Steel Equivalent Grades

5XHM Tool Steel Specifications

5XHM Tool Steel Customized Options

1. Custom Surface Conditions: Black; Sandblasted; Grinded; Turned/Machined/Milled/Bright
2. Custom Chemical Composition: Capable of producing standard grades such as GB, DIN, ASTM, JIS, etc. Chemical composition can be custom-produced individually.
3. Custom Specifications: Round steel (diameter) and plates (thickness, width) can be custom-produced.
4. Professional packaging for long-term storage or extreme transportation conditions: Including black paint spraying on all sides, plastic film wrapping, anti-rust oil spraying, and delivery in wooden cases.
5. Custom production according to samples or technical agreements.
6. 5XHM Tool Steel Electroslag Remelting (ESR): Premium option with higher purity and isotropic properties for critical applications.

5XHM Tool Steel Smelting process

FCS TOOL STEEL Factory's 5XHM Tool Steel is produced through a sophisticated smelting process comprising Electric Arc Furnace (EF) initial melting for molten steel preparation, Ladle Furnace (LF) refining to adjust chemical composition and remove impurities, Vacuum Degassing (VD) treatment to reduce gas content and enhance purity, followed by hot rolling or hot forging to shape the material and refine its grain structure, and final annealing to eliminate internal stresses, soften the steel, and improve machinability—all working together to ensure the steel's high quality, uniform performance, and suitability for demanding industrial applications.

5XHM Tool Steel Physical Properties

1. Hardness: ≤241 HB in annealed condition, up to 300-350 HB in pre-hardened condition.
2. Thermal stability: hardness at 500 ℃ to maintain ≥ 300 HB, low coefficient of thermal expansion (12.5 × 10-⁶ / ℃), to reduce the risk of high-temperature deformation.
3. Thermal conductivity: medium thermal conductivity (~30 W/m-K), need to cooperate with the cooling design to avoid mould thermal cracking.

5XHM Tool Steel Mechanical & Performance Properties

1. High toughness and impact resistance: nickel-vanadium synergism absorbs impact energy and prevents mould cracking, especially suitable for heavy-duty forging scenarios.
2. Thermal fatigue resistance: low crack expansion rate under cyclic loading in the medium temperature range (≤600℃), prolonging the life of the die.
3. Machining adaptability:Excellent cutting performance in annealed state (hardness ≤ 241 HB).Good weldability, support for filler repair (need to preheat to 300 ℃).
4. Economy: 30% lower cost than high-speed steel, and can be reused by multiple tempering tooling.

5XHM Tool Steel Product Applications

1. 5XHM is designed for high stress hot work moulds, mainly used in:
2. Forging industry: hammer forging dies, crankshaft forging dies, large gear precision forging dies (to withstand >500℃ instantaneous high temperature).
3. Die casting auxiliary tooling: die holders, ejector plates, trimming dies (need to resist aluminium/magnesium alloy melt washout).
4. Stamping field: thick plate fine blanking die (≥6mm plate), hot shear blade.
5. Plastic moulds: injection mould inserts made of glass fibre reinforced materials (wear resistance required).