H13 Tool Steel
Resisting severe abrasive tool wear from fiber-reinforced compounds and enduring rapid thermal cycling without heat checking requires a high-hardness hot-work alloy, which AISI H13 (DIN 1.2344) tool steel delivers. Vacuum hardened and triple tempered to 50–54 HRC, H13 chromium-molybdenum-vanadium steel provides exceptional thermal shock resistance, high compressive strength, and unyielding gate wear resistance. At Jucheng Precision, a certified ISO 9001 and IATF 16949 contract manufacturer, we specialize in 5-axis CNC machining of H13 steel mold cavities. Delivering class 101 tool shot lives exceeding 1,000,000 cycles, our H13 molds reliably process high-temperature super-polymers and abrasive filled resins, verified by Zeiss CMM inspection.
High-durability H13 Tool Steel cavity manufacturing for high-temperature and abrasive glass-filled resin injection molding. Vacuum hardened to 50–54 HRC, AISI H13 (DIN 1.2344) chromium-molybdenum hot-work tool steel resists thermal fatigue cracking and severe gate wear across 1,000,000+ production cycles.
H13 Tool Steel Thermal Shock & Abrasive Wear Profile
AISI H13 is a hot-work tool steel vacuum heat-treated to high hardness, certified to resist heat checking and abrasive fiber erosion:
| Metallurgical Metric | AISI H13 Steel Spec Value | High-Temperature Tooling Advantage |
|---|---|---|
| Vacuum Hardened Core Hardness | 50 – 54 HRC (Triple Tempered) | High compressive yield strength (1,650 MPa) prevents cavity wall indentation and parting line flash under intense clamping tonnage. |
| Chrom-Moly-Vanadium Alloy | AISI H13 / DIN 1.2344 / SKD61 | Vanadium carbide dispersion provides exceptional resistance to abrasive wear caused by high-velocity glass or carbon fibers. |
| Thermal Fatigue Resistance | Hot-Work Temper Resistance up to 550°C | Resists heat checking and micro-cracking caused by rapid thermal cycling during high-temperature super-polymer processing. |
H13 Steel Compatibility with Abrasive & High-Heat Resins
H13 hardened tool steel is the mandatory industry choice for abrasive filled compounds and extreme-temperature thermoplastics:
| High-Demand Resin Class | Recommended Polymer Chemistry | H13 Tool Steel Rationale |
|---|---|---|
| Heavy Fiber Compounds | Glass Fiber (GF) & Carbon Fiber (CF) Reinforced Resins | High surface hardness (52 HRC) prevents gate wash-out, runner scarring, and cavity erosion caused by 30%–50% fiber shearing. |
| High-Temperature Super-Polymers | Polyetheretherketone (PEEK), Polyphenylene Sulfide (PPS), Polyetherimide (PEI/Ultem), Liquid Crystal Polymer (LCP) | Maintains unyielding core hardness when exposed to continuous oil-heated mold temperatures of 160°C–200°C and 400°C melt processing. |
| Long-Life Mass Production Tools | Class 101 Multi-Cavity Tooling | Guarantees 1,000,000+ shot tool lives for High Volume Injection Molding operations under Custom Mold Making frameworks. |
H13 Tool Steel Vacuum Hardening & PVD Coating Blueprint
Executing high-performance H13 tool steel mold building requires strict thermal treatment protocols and 5-axis CNC machining:
Vacuum Heat Treatment (50-54 HRC)
H13 steel blocks undergo computer-controlled vacuum quenching followed by triple tempering. This establishes a uniform 50–54 HRC core hardness, maximizing impact toughness while eliminating micro-cracking during high-speed CNC milling.
PVD Ceramic Coating for Gate Protection
For highly abrasive 50% glass-filled compounds, we apply thin PVD TiN or CrN ceramic coatings to H13 gate inserts. This increases surface hardness above 65 HRC, protecting gate orifices from high-velocity fiber wash-out.
Key Application Fields for H13 Steel Molds
- Automotive Powertrains & Under-the-Hood: Production Injection Mold tools for glass-filled engine intake manifolds, cylinder head covers, EV battery module brackets, and radiator end tanks.
- Aerospace & Defense: Multi-Cavity Injection Mold tools for carbon-filled PEEK drone arms, structural aircraft brackets, and high-temperature sensor housings.
- Power Tools & Heavy Industrial Equipment: High-wear Insert Injection Molding tools for circular saw frames, drill housings, chemical pump impellers, and gearboxes.
Properties
| Density (AISI H13 Steel) | 7.8 g/cm³ |
| Hardness Range (Vacuum Hardened) | 50 - 54 HRC |
| Brinell Hardness Equivalent | 520 HB |
| Tensile Yield Strength (52 HRC) | 1,650 MPa |
| Ultimate Tensile Strength | 1,990 MPa |
| Elongation at Break | 9 % |
| Flexural Modulus | 210 GPa |
| Thermal Conductivity (20°C) | 24.3 W/(m·K) |
| Coefficient of Thermal Expansion (20-100°C) | 10.9 10⁻⁶/K |
| Compressive Strength (52 HRC) | 2,100 MPa |
| Impact Toughness (Charpy V-Notch) | 22 J |
| SPI Polishing Surface Capability | SPI B-1 / A-3 (Fine Diamond) - |
| Guaranteed Tool Shot Life (Class 101 Hardened) | 1,000,000+ Cycles |
| Maximum Mold Cavity Block Size | 1800 x 1200 mm |
| Minimum Machining Tolerance | +/- 0.005 mm |