Aobo Steel | Global Tool Steel Supplier in China
H13 Tool Steel Supplier | 1.2344 | SKD61 | Annealed Bulk Supply
Annealed Condition | Stable 20GP Container Supply | For Global Distributors
- 100% UT Tested – SEP 1921-82 Class D/d or E/e
- Full Batch Traceability with MTC · ESR on Request
- Surface: Black / Turned / Polished
- Ready stock in Huangshi — 1,000 t of tool steel
Check stock & price
Send the sizes, quantity and destination port — we confirm stock and price within one working day.
H13 tool steel (1.2344 / SKD61) is the industry benchmark hot-work tool steel, widely used for aluminum die casting, hot forging, and extrusion tooling. H13 / 1.2344 flat bar and round bar are held in stock in Huangshi, drawn from our 1,000 t tool steel stock; sizes outside the range below are rolled or forged to order. For press-hardening (hot stamping) dies, the grade selection is set out in the hot stamping die steel selection page.
H13 Tool Steel Supply Overview
| Grade | AISI H13 / DIN 1.2344 / JIS SKD61 |
| Delivery Condition | Fully Annealed (Soft Condition for Machining) |
| Available Forms | Round Bar / Flat Bar / Plate / Forged Block Plate also milled square or ground flat to finished size — precision ground tool steel plate |
| Stock | 1,000 t of tool steel in stock in Huangshi — H13 / 1.2344 is supplied from it within the size range below |
| Size Range | Flat bar 8–810 mm · Round bar Φ12–Φ500 mm — full size table |
| Monthly Production Capacity | Stable hot work steel scheduling |
| Recommended Export Quantity | Full 20GP container (~26 tons) |
| MOQ | 5 tons |
| Lead Time (With Ingot Stock) | Approx. 25 days |
| Lead Time (Fresh Melt) | 35–50 days |
| Lead Time (ESR Grade) | Approx. 60 days |
| Inspection | In-house UT team + Third-party inspection available |
| Documentation | MTC (EN 10204 3.1) + UT Report |
Why Global Distributors Source H13 from Aobo Steel
- Continuous monthly supply of around 1,200 tons
- MOQ from 5 tons for wholesale orders
- Container-optimized bar and plate lengths
- Mixed sizes are supported for export loading
- Annealed delivery for downstream machining
- Stable sourcing through integrated supply chain partners
- UT inspection available to SEP 1921-82 D/d or E/e
- MTC and batch traceability with each shipment
- Heat number tracking for order control
- Black, turned, and polished surface options
- Bulk export packing for sea shipment
- Clear conversion path to the dedicated bulk supply page
Production Stability
- Dedicated production planning for hot work tool steel
- Strict segregation control for large cross-section sizes
- Optional ESR (Electro-Slag Remelting) for higher cleanliness
- Controlled alloy sourcing to ensure stable thermal fatigue performance
- Full batch traceability linked to the original heat number
Available H13 Tool Steel Forms and Size Range
| Shape | Thickness / Diameter (mm) | Width (mm) | Length |
|---|---|---|---|
| Flats (forged, black surface) | 35–400 | 200–810 | 2–5 m |
| Flats (forged, machined surface) | 30–400 | 200–810 | 2–5 m |
| Flats (hot rolled, black surface) | 8–60 | 210–610 | 3–5 m |
| Rounds (forged, black and turned) | Φ60–Φ500 | — | 2–5 m |
| Rounds (rolled, black and turned) | Φ12–Φ60 | — | 3–5.8 m |
Supply range for forged and rolled tool steel — not a stock list. Stock is held on part of this range; anything outside it is produced to order: about 25 days with ingot in stock, 35–50 days for a fresh melt, 60 days for ESR.
Quality Control for Bulk Orders
Every batch of tool steel supplied by Aobo Steel is verified before shipment to ensure grade accuracy, internal soundness, and traceability for bulk orders.
- Chemical composition verified by a spectrometer
- Ultrasonic testing available (SEP 1921-82)
- Delivered in spheroidized annealed condition
- Mill Test Certificate (EN 10204 3.1) with heat number
- Dimensional and surface inspection before shipment
Export Packaging and Container Loading
- Professional seaworthy export packing
- 20GP loading optimized up to ~26 tons
- Mixed grades and mixed sizes supported
- Anti-rust protection for long sea transit
For international shipments, full-container loading is strongly recommended to ensure cost efficiency and smoother customs processing.
AISI H13 Tool Steel | 1.2344 | SKD61 Gallery
Applications of H13 Tool Steel
- Plastic Injection dies
- Shearing Blades
- Friction Stir Welding (FSW) Tools
- Structural Components
Hardness and grade selection for each of these applications is covered in the H13 properties and applications reference.
H13 Steel and Its Equivalent Grades' Composition
| C | Cr | Mo | V | Si | Mn | P | S |
| 0.32 – 0.45% | 4.75 – 5.50% | 1.10 – 1.75% | 0.80 – 1.20% | 0.80 – 1.25% | 0.20 – 0.60% | ≤ 0.030% | ≤ 0.030% |
H13 tool steel equivalent grades' composition. The limits for the base AISI grade, element by element, are listed on the H13 chemical composition page.
| Grade | Standard | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Mo (%) | V (%) |
| 1.2344 | DIN | 0.37-0.42 | 0.90-1.20 | 0.30-0.50 | ≤0.030 | ≤0.030 | 4.80-5.50 | 1.20-1.50 | 0.90-1.10 |
| SKD61 | JIS | 0.35-0.42 | 0.80-1.20 | 0.25-0.50 | ≤0.030 | ≤0.030 | 4.80-5.50 | 1.00-1.50 | 0.80-1.15 |
| 4Cr5MoSiV1 | GB | 0.32-0.42 | 0.80-1.20 | 0.20-0.50 | ≤0.030 | ≤0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 |
We guarantee that all materials are manufactured in strict compliance with the specified chemical compositions for H13, 1.2344, and SKD61.
The full list of designations this grade family carries across standards, and how closely each one matches, is in the H13 equivalent grades reference.
H13 tool steel properties
Property tables for this grade -- mechanical, high-temperature, wear and physical -- are in the H13 steel properties reference. Hardness ranges by application are on the H13 hardness chart, and machinability and grinding behaviour on the H13 machinability page.
The specific properties depend heavily on the tempering temperature. Here are typical longitudinal mechanical properties when air-cooled from 1025 °C (1875 °F) and tempered:
Mechanical Properties (Typical Values at Room Temperature, Double Tempered 2h + 2h)
| Property | 527 °C (980 °F) Temper | 555 °C (1030 °F) Temper | 575 °C (1065 °F) Temper |
| Hardness | 52 HRC | 50 HRC | 48 HRC |
| Tensile Strength (Rm) | 1960 MPa (284 ksi) | 1835 MPa (266 ksi) | 1730 MPa (251 ksi) |
| Yield Strength (Rp0.2) | 1570 MPa (228 ksi) | 1530 MPa (222 ksi) | 1470 MPa (213 ksi) |
| Elongation (in 4D) | 13.0% | 13.1% | 13.5% |
| Reduction in Area | 46.2% | 50.1% | 52.4% |
| Charpy V-notch Impact | 16 J (12 ft·lbf) | 24 J (18 ft·lbf) | 27 J (20 ft·lbf) |
Physical properties
| Property | Value |
|---|---|
| Density | 7.75 – 7.80 g/cm3 |
| Tensile Strength, Ultimate | 1200 – 2050 MPa (174000 – 231000 psi) |
| Tensile Strength, Yield | 1000 – 1380 MPa (145000 – 200000 psi) |
| Hardness | 45-52 HRC (Rockwell C Hardness) |
| Impact Toughness | 20-40 J/cm2 |
| Compressive Strength | 2550 MPa |
H13 Tool Steel Guides
Reference pages for this grade, and how it compares with the other hot-work and cold-work grades:
- H13 Steel Properties -- mechanical, high-temperature, wear and physical data
- H13 Hardness Chart -- HRC by application and tempering temperature
- H13 Chemical Composition -- element ranges and their effect on properties
- H13 Heat Treatment -- hardening, tempering and cooling schedules
- H13 Equivalent Grades -- 1.2344, SKD61, 4Cr5MoSiV1 and the rest
- H13 Machinability -- machining, grinding and EDM behaviour
- H13 vs A2, H13 vs H11, H13 vs H21, H13 vs P20, H13 vs SKD61, H13 vs 1.2367
- Limitations and Challenges of H13 -- when it is the wrong choice
- What Is H13 ESR Material? -- remelted grade for die casting
H13 Tool Steel Heat Treatment Overview
The full schedules -- austenitizing, soak times, cooling and tempering curves -- are in the H13 heat treatment guide.
Hardening
Preheating to around 815°C (1500°F) is recommended before hardening.
Austenitizing temperature: 1010–1040°C (1850–1900°F).
H13 is typically air quenched to minimize distortion and residual stress. Hardness after quenching: 52–54 HRC.
Tempering
Tempering should be performed immediately after quenching.
Typical tempering range: 540–620°C (1000–1150°F). Double tempering is commonly recommended for hot work tooling.
Typical hardness after tempering:
- 540°C: ~47–48 HRC
- 620°C: ~36–38 HRC
Tempering around 500°C (930°F) should generally be avoided due to reduced toughness.