8407 Hot Work Tool Steel Round Bar
Short Description:
8407 hot work tool steel round bar is a premium H13 / 1.2344 type Cr-Mo-V tool steel for die casting dies, extrusion tooling, hot punches and forging dies. Custom diameter, surface, cutting, UT, MTC and EN 10204 3.1 available.
8407 Hot Work Tool Steel Round Bar is a premium H13 / 1.2344 type chromium-molybdenum-vanadium hot work tool steel supplied for die casting dies, extrusion tooling, hot forging dies, hot punches, mandrels, inserts, cores, ejector pins and other high-temperature tooling components. It is commonly associated with AISI H13, DIN 1.2344, JIS SKD61 and X40CrMoV5-1, depending on the applicable specification and customer requirement.
SAKY STEEL supplies 8407 hot work tool steel round bar and forged bar in annealed, hot rolled, forged, peeled, turned or ground condition according to purchase requirements. Available services may include cutting, peeling, turning, grinding, rough machining, dimensional inspection, hardness testing, ultrasonic testing when specified, MTC and EN 10204 3.1 documentation.
Product Parameters
| Item | Product Details |
|---|---|
| Product Name | 8407 Hot Work Tool Steel Round Bar |
| Grade | 8407 / H13 / 1.2344 / SKD61 |
| UNS / EN Designation | UNS T20813 / X40CrMoV5-1 Reference |
| Material Family | Cr-Mo-V hot work tool steel |
| Product Shape | Round bar and forged round bar |
| Size Range | Regular and custom diameters by order |
| Length | 1000–6000 mm or cut to length |
| Surface Finish | Black, peeled, turned, ground, machined |
| Delivery Condition | Annealed or heat treated when specified |
| Standard Reference | ASTM A681 / DIN EN ISO 4957 Reference |
| Tolerance | Mill, h9, h11 or drawing-specific |
| Available Services | Cutting, peeling, turning, grinding, rough machining, UT when specified |
| Certificates | MTC, EN 10204 3.1, dimensional and inspection reports |
Chemical Composition
8407 is generally treated as a premium H13 / 1.2344 type hot work tool steel based on chromium, molybdenum and vanadium alloying. Chromium improves hardenability and high-temperature performance, molybdenum supports temper resistance, and vanadium helps grain refinement and wear resistance.
| Element | Typical Reference Content | Technical Function |
|---|---|---|
| Carbon | About 0.32–0.45% | Provides hardenability and working hardness |
| Chromium | About 4.75–5.50% | Improves hardenability and high-temperature behavior |
| Molybdenum | About 1.10–1.75% | Supports temper resistance and hot strength |
| Vanadium | About 0.80–1.20% | Refines grain and improves wear resistance |
| Silicon | About 0.80–1.20% | Supports oxidation behavior and matrix strength |
| Manganese | About 0.20–0.50% | Supports melting control and hardenability |
| Phosphorus | Controlled maximum | Restricted to support toughness |
| Sulfur | Controlled maximum | Restricted to limit inclusions and improve die reliability |
| Iron | Balance | Base metal matrix |
Actual chemical composition shall be confirmed by the applicable product specification and MTC.
Mechanical and High-Temperature Properties
Mechanical and service properties of 8407 hot work tool steel round bar depend on diameter, melting quality, heat treatment, working hardness, test direction and service temperature. The values below are typical references and should not replace order-specific MTC or heat-treatment records.
| Property | Typical Reference | Condition | Engineering Meaning |
|---|---|---|---|
| Annealed Hardness | Usually below about 229–235 HB | Annealed bar | Supports machining before hardening |
| Working Hardness | About 44–52 HRC reference | Hardened and tempered | Selected according to die application |
| Thermal Fatigue Resistance | Good for hot work tooling | Repeated heating and cooling | Helps resist heat checking in dies |
| Hot Strength | Good retention after tempering | Application dependent | Useful in die casting, hot forging and extrusion tooling |
| Toughness | Good for premium H13 type steel | Proper heat treatment | Helps reduce cracking and chipping risk |
| Wear Resistance | Good at elevated temperature | Hardened and tempered | Supports die life in hot forming service |
| Hardening Temperature | About 1010–1030°C reference | Subject to heat-treatment practice | Must be controlled by qualified procedure |
| Density | About 7.8 g/cm³ reference | Room temperature | Used for bar weight calculation |
Common Size Table
| Diameter | Length | Surface | Processing | Typical Use |
|---|---|---|---|---|
| Ø10–30 mm | 1000–6000 mm | Peeled or ground | Cutting and grinding | Ejector pins, cores and small tools |
| Ø35–80 mm | 2000–6000 mm | Peeled or turned | Machining allowance | Hot punches, inserts and tooling shafts |
| Ø85–160 mm | Custom cut length | Rough turned | Saw cut or machined | Die casting and extrusion components |
| Ø165–300 mm | Made to order | Forged and turned | UT when specified | Large hot work tooling |
| Above Ø300 mm | Project specific | Forged or machined | Technical review required | Heavy dies and tool blocks |
Different Specifications Comparison
Round Bar Surface and Production Comparison
| Condition | Main Feature | Recommended Use | Purchase Advice |
|---|---|---|---|
| Hot Rolled Bar | Economical mill surface | Rough machining | Specify machining allowance |
| Forged Bar | Suitable for large sections | Heavy hot work dies | UT and forging ratio may be specified |
| ESR / Premium Quality Bar | Improved cleanliness and uniformity when specified | Critical die casting and extrusion dies | Confirm exact quality requirement in order |
| Peeled Bar | Scale-free surface | CNC machining | Reduces surface preparation |
| Ground Bar | Tight tolerance and smooth finish | Precision tooling components | State h9, h8 or drawing tolerance |
Comparison with Related Hot Work Tool Steels
| Grade | Main Strength | Relative Limitation | Typical Selection |
|---|---|---|---|
| H11 / 1.2343 | Good toughness and heat checking resistance | Different alloy balance from H13 / 8407 | Hot work tools requiring toughness |
| H13 / 1.2344 | Balanced toughness, hot strength and heat checking resistance | Quality level depends on melting and inspection requirement | Die casting, extrusion and forging tools |
| 8407 | Premium H13 type performance for demanding hot work tools | Higher cost than standard H13 type material | Critical die casting dies and high-service tooling |
| H21 / 1.2581 | Tungsten hot strength and red hardness | Different toughness and machinability balance | Special hot punches and high-temperature tools |
Equivalent Standards and International Names
| System | Designation | Relationship |
|---|---|---|
| Commercial Grade | 8407 | Premium H13 type hot work tool steel |
| AISI / ASTM | H13 | Common hot work tool steel reference |
| UNS | T20813 | UNS designation for H13 type steel |
| DIN / W.Nr. | 1.2344 | German material number reference |
| EN Name | X40CrMoV5-1 | European chemical designation |
| JIS | SKD61 | Japanese cross-reference |
| Chinese Reference | 4Cr5MoSiV1 | Common Chinese H13 type steel reference |
| Product Standard Reference | ASTM A681 / DIN EN ISO 4957 | Tool steel specification references |
Production Process Flow
Alloying materials are selected according to the required 8407 / H13 type chemistry.
Chemistry, cleanliness and residual elements are controlled during steelmaking.
Premium or ESR quality can be discussed when specified for critical tooling.
The material is processed into round bar or forged bar form.
Annealing improves machinability before final die manufacturing.
Bars may be peeled, turned, ground, machined or cut to size.
Dimensions, surface, hardness and traceability are checked.
Heat-number marking and export packing are prepared.
Product Inspection
| Inspection | Method | Purpose |
|---|---|---|
| Chemical Analysis | Laboratory analysis or MTC review | Confirm 8407 / H13 type chemistry |
| PMI | Positive material identification | Available when specified; not a substitute for full chemistry |
| Hardness Test | HB or HRC test as applicable | Confirm annealed or heat-treated condition |
| Dimensional Inspection | Caliper, micrometer and length check | Verify diameter, length and tolerance |
| Surface Inspection | Visual and finish inspection | Check cracks, scale, laps or handling damage |
| Ultrasonic Testing | UT when specified | Evaluate internal soundness in suitable sizes |
| Microstructure Review | Available when specified | Supports premium quality verification |
| Traceability Review | Heat number and label verification | Link product to MTC and EN 10204 3.1 |
Product Packaging
Bars can be protected with anti-rust oil, VCI paper, film or waterproof wrapping.
Steel straps, separators and padding reduce movement and scratching.
Ground or machined bars can receive end caps or padded protection.
Export packing is selected according to bar diameter, length and weight.
Grade, size, heat number and customer shipping marks can be retained.
Applications, Core Performance and Fabrication
Primary Applications
- Aluminum die casting dies and inserts
- Hot extrusion dies, mandrels and liners
- Hot forging dies and die inserts
- Hot punches, hot shear blades and trimming tools
- Cores, ejector pins, nozzles and die casting components
- High-quality plastic molds requiring thermal stability and polishability
Core Performance
8407 is valued for thermal fatigue resistance, toughness, hot strength, wear resistance and resistance to softening at elevated temperature. These properties help extend tool service life in die casting, hot forging and extrusion applications when heat treatment and die design are properly controlled.
Machinability
Machinability is generally good in the annealed condition. Major turning, milling, drilling and rough machining are usually completed before hardening and tempering. Peeled, turned or ground bars help reduce preparation time before CNC machining.
Heat Treatment
8407 is normally supplied annealed before machining and then hardened and tempered according to the final tool requirement. Heat treatment should be selected according to section size, die geometry, target hardness, working temperature and impact load.
Nitriding and Surface Treatment
Nitriding may be used to improve surface hardness and wear resistance for selected die casting and extrusion tools. Surface treatment should be selected after considering base hardness, die design, service temperature and required case depth.
Why Choose SAKY STEEL?
Diameter, length, surface finish and machining allowance can be supplied according to drawings.
Material identification can be maintained from documentation to final packing.
MTC (Mill Test Certificate / 质保书) can be provided according to the purchase order.
EN 10204 3.1 documentation is available when specified by the order.
Hardness, dimensional, PMI, UT and microstructure review can be arranged when specified.
Bundles, wooden cases, pallets and customer shipping marks can be arranged.
FAQ
What is 8407 hot work tool steel?
8407 is a premium H13 / 1.2344 type hot work tool steel used for die casting dies, extrusion tooling, hot forging dies, hot punches, inserts and high-temperature tooling components.
Is 8407 the same as H13 or DIN 1.2344?
8407 is commonly treated as a premium H13 / DIN 1.2344 type material, but final equivalence should be confirmed by chemistry, heat treatment, hardness, inspection requirement and quality level such as ESR or premium grade requirement.
What applications use 8407 round bar?
8407 round bar is used for aluminum die casting dies, extrusion dies, hot forging dies, hot punches, mandrels, cores, ejector pins and other hot work tooling that requires thermal fatigue resistance and toughness.
Can 8407 bar be supplied ground or peeled?
Yes. Black, peeled, turned and ground surfaces can be discussed according to diameter, tolerance and final machining requirement. Ground bars are suitable where tighter diameter control or improved surface finish is required.
What hardness is used for 8407 tool steel?
8407 is usually supplied annealed for machining. After hardening and tempering, the working hardness is selected according to die type, service temperature, impact load and required tool life.
Is ultrasonic testing available for 8407 bars?
UT can be arranged for suitable bar diameters and forged bars when specified. The order should define the test method, acceptance level and reporting requirement.
Can MTC and EN 10204 3.1 be provided?
SAKY STEEL can provide MTC and EN 10204 3.1 documentation according to the purchase order. Hardness, dimensional, PMI, UT or microstructure reports may also be arranged when specified.
