Steel 8407
AISI/SAE 8407
8407 is an electroslag-refined chromium-molybdenum-vanadium hot-work tool steel of the AISI H13 type, with higher cleanliness and through-thickness isotropy than standard H13.
Reference datasheet — 8407 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the ANN condition
8407 tempers and conditions
8407 is supplied in 9 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefault Annealed | Standard mill delivery condition for bar, plate and forged blocks; machine to shape, then harden and temper. | 520 | 800 | 18 | 11 HRC | 3.3 % IACS |
ESR premium H13 quality (annealed supply) | Standard ESR premium quality for general hot-work and die-casting tooling at lower cost than Supreme. | 520 | 800 | 18 | 180 HB | 3.3 % IACS |
8407 Supreme | Top quality level with lowest S/inclusion content and best transverse toughness — for large, thermally-cycled die-casting dies and mirror-polished moulds. | 520 | 800 | 20 | 180 HB | 3.3 % IACS |
Q&T 40–44 HRC | Pick for large forging dies and heavy-section die-casting dies where gross cracking risk outweighs wear resistance. | 1,150 | 1,350 | 12 | 42 HRC | — |
Q&T 44–46 HRC | Balanced toughness/hot strength for aluminium die-casting dies and hot-extrusion tooling. | 1,250 | 1,480 | 11 | 45 HRC | — |
Q&T 46–48 HRC | Choose for aluminium/magnesium die-casting inserts, cores and pins needing better erosion and wear resistance. | 1,350 | 1,600 | 10 | 47 HRC | — |
Q&T 46–48 HRC + gas/plasma nitrided case | Surface-hardened die condition for soldering/erosion resistance in aluminium die casting; brittle white layer must be controlled. | 1,350 | 1,600 | 9 | 47 HRC | 25 W/m·K |
Q&T 48–50 HRC | For extrusion dies, hot shear blades and punches where indentation and wear dominate over impact. | 1,450 | 1,750 | 9 | 49 HRC | — |
Q&T 50–52 HRC | Maximum wear resistance for small cores, pins and plastic-mould inserts; toughness and thermal-fatigue life are reduced. | 1,570 | 1,900 | 8 | 51 HRC | — |
What is 8407?
8407 is an electroslag-refined chromium-molybdenum-vanadium hot-work tool steel of the AISI H13 type, with higher cleanliness and through-thickness isotropy than standard H13. Engineers use it for aluminum die-casting dies, extrusion tooling and plastic mould cores, supplied annealed at 180 HB (800 MPa tensile, 520 MPa yield, 18 % elongation) or hardened 40-52 HRC, plus nitrided, 8407-2M and 8407-SUP variants. Listed maximum service temperature is 540 C and machinability about 55. It is a hot-work steel only, rusts unprotected, and costs more than conventional H13, which remains the lower-cost substitute. 8407 has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,425°C (2,597 °F). 8407 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 67% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi).
What is 8407 used for?
- Aluminum die-casting dies
- Extrusion dies
- Plastic mold cores
Advantages
- Polishes to a fine finish — 90/100, better than 100% of steel grades
- High service temperature — 540°C (1,004 °F), better than 93% of steel grades
Limitations
- High embodied carbon — 2.8 kg CO₂/kg, worse than 90% of steel grades
- Poor heat conductor — 25.5 W/m·K (14.7 BTU/hr·ft·°F), worse than 88% of steel grades
- Low electrical conductivity — 3.3 % IACS, worse than 86% of steel grades
- Low fracture toughness — 65 MPa·√m (59.2 ksi·√in), worse than 75% of steel grades
8407 properties
Typical room-temperature values for 8407-ANN; bars are the position among steel grades.
Physical3
8407 has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical17
8407 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 67% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal5
8407 is rated for continuous service to 540°C (1,004 °F). It conducts heat at 25.5 W/m·K (14.7 BTU/hr·ft·°F), worse than 88% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
8407 conducts electricity at 3.3 % IACS, worse than 86% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (18/100), better than 83% of steel grades.
Sustainability4
Producing a kilogram of 8407 takes about 35 MJ of energy and emits 2.8 kg of CO₂ — more than 87% of steel grades. Typical recycled content is 45%.
Manufacturability6
8407's machinability is good (55/100, better than 62% of steel grades); weldability fair (45/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 8407 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 8407
Is 8407 easy to machine?
Machine fully in the annealed state with rigid setups and coated carbide (Vc ≈ 80–150 m/min); after hardening to 45–50 HRC use hard-milling, EDM or grinding, and stress-relieve after rough machining.
Can 8407 be welded?
Repairable by TIG/MMA with matching H13 filler at 325–400 °C preheat, interpass held, then slow cool and temper 15–25 °C below the last tempering temperature.
Can 8407 be formed, bent or molded?
Hot work only — forge 1050–1150 °C, finish above 900 °C, slow cool and soft-anneal at 850–900 °C; cold forming is not practical.
8407 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CAISI H13 range 0.32–0.45; 8407 nominal 0.39 | 0.35 – 0.42 | 0.39 |
| Si | 0.8 – 1.2 | 1 |
| Mn | 0.25 – 0.55 | 0.4 |
| Cr | 4.9 – 5.5 | 5.2 |
| Mo | 1.2 – 1.6 | 1.4 |
| V | 0.8 – 1.1 | 0.9 |
| PESR practice, typically ≤0.015 | ≤ 0.02 | |
| Ssuper-clean ESR, typically ≤0.003 | ≤ 0.01 | |
| Fe | balance |
What surface finishes work on 8407?
Excellent mirror/photo-etch polishability thanks to ESR cleanliness; commonly nitrided, PVD (CrN/AlTiN) or duplex-coated for die-soldering resistance, and must be oiled or coated to prevent rusting.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 8407 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- H13
How much does 8407 cost?
8407 is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
8407 — frequently asked
What is 8407 used for?
8407 is typically used for aluminum die-casting dies, extrusion dies and plastic mold cores. In short: ESR-clean H13 type; mirror-polishable die steel; higher toughness than standard H13.
What is the yield strength of 8407?
8407 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is 8407 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machine fully in the annealed state with rigid setups and coated carbide (Vc ≈ 80–150 m/min); after hardening to 45–50 HRC use hard-milling, EDM or grinding, and stress-relieve after rough machining.
Can 8407 be welded?
With care — weldability is rated fair (45/100). Repairable by TIG/MMA with matching H13 filler at 325–400 °C preheat, interpass held, then slow cool and temper 15–25 °C below the last tempering temperature.
What surface finishes work on 8407?
Excellent mirror/photo-etch polishability thanks to ESR cleanliness; commonly nitrided, PVD (CrN/AlTiN) or duplex-coated for die-soldering resistance, and must be oiled or coated to prevent rusting.
Can 8407 be formed, bent or molded?
Hot work only — forge 1050–1150 °C, finish above 900 °C, slow cool and soft-anneal at 850–900 °C; cold forming is not practical.
What is the maximum service temperature of 8407?
8407 is rated for continuous use to about 540°C (1,004 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 8407-ANN and 8407 QT50-52?
ANN is the default condition — standard mill delivery condition for bar, plate and forged blocks; machine to shape, then harden and temper. QT50-52: maximum wear resistance for small cores, pins and plastic-mould inserts; toughness and thermal-fatigue life are reduced. Yield strength is 520 MPa in ANN versus 1,570 MPa in QT50-52.
How much does 8407 cost?
8407 is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASSAB 8407 Supreme / 8407 2M hot work tool steel datasheet — ASSAB / Uddeholm (voestalpine) (2023)
- Uddeholm Orvar Supreme — Uddeholm AB (2022)
- ASTM A681 – Standard Specification for Tool Steels Alloy (H13) — ASTM International (2015)
- GB/T 1299 (4Cr5MoSiV1) — SAC (2014)
- NADCA #207 Special Quality Die Steel & Heat Treatment Acceptance Criteria — North American Die Casting Association (2020)
- ASM Handbook Vol.1 – Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.