DIN 1.2365 Hot Work Tool Steel
Superior Thermal Fatigue Resistance
DIN 1.2365’s chromium-molybdenum matrix ensures 30% longer service life than H13 in cyclic thermal environments (e.g., aluminum die-casting). Its retained hardness (≥45 HRC at 600°C) minimizes cracking and deformation under repeated heating-cooling cycles.
Precision Machinability & Surface Finish
In the annealed state (≤229 HB), the steel exhibits excellent grindability and polishability, achieving mirror-like surfaces for high-gloss plastic molds. Minimal distortion during heat treatment ensures dimensional accuracy for complex geometries.
Versatile Industrial Adaptability
From automotive forging dies to aerospace turbine molds, DIN 1.2365 adapts to diverse high-temperature applications. Its cost-effective performance and extended tool lifespan reduce production downtime, making it a top choice for manufacturers.
- HONGXIN
- 中国
- 30DAYS
- 8000TONS/MONTH
- Information
DIN 1.2365 Hot Work Tool Steel Overview
1. DIN 1.2365 Tool Steel Introduction
DIN 1.2365 (X37CrMoV5-1) is a high-performance hot work tool steel renowned for its exceptional thermal fatigue resistance and toughness. With a composition of 0.35-0.42% carbon, 4.80-5.50% chromium, ad 1.20-1.50% molybdenum, it achieves a hardness of 48-52 HRC after heat treatment. Its ability to retain hardness at 600°C makes it ideal for aluminum die-casting molds, forging dies, and aerospace components. Widely used in automotive, metalworking, and heavy machinery industries, DIN 1.2365 combines durability with cost-effectiveness for extreme thermal cycling environments.
| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
| Packing | Standard Packages, or as Customers Request | |
| Application | ASTM H10 tool steel are suitable for highly stressed hot work tools, mainly for the processing of heavy alloys, such as: Extrusion Industry: Dies, Inner Liners, Stems, Pressure Pads, Mandrels for Extrusion, Forging Industry: Forming Dies, Press Dies, Pressing Mandrels, Die Casting Industry: dies for die-casting, die inserts, hot shear blades, moulds for processing brass and light metal. | |
2. DIN 1.2365 Tool Steel Supply Range
| Size | Round | Dia 12-500mm |
| Plate/Flat/Block | Thickness 8mm-300mm | |
| Width 210mm-710mm | ||
| Process | EAF+LF+VD+Forged+Heat treatment(optional) |
3. DIN 1.2365 Tool Steel Chemical Composition & Global Equivalents
| Grade | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| H10/T20810 | 0.35 | 0.45 | 0.20 | 0.70 | ≤ | 0.03 | 0.80 | 1.25 | 3.00 | 3.75 | 0.25 | 0.75 | 2.00 | 3.00 |
| 1.2365/ 32CrMoV12-28 | 0.28 | 0.35 | 0.15 | 0.45 | ≤ | 0.03 | 0.10 | 0.40 | 2.70 | 3.20 | 0.40 | 0.70 | 2.50 | 3.00 |
| SKD7 | 0.28 | 0.35 | 0.15 | 0.45 | 0.03 | 0.03 | 0.10 | 0.40 | 2.70 | 3.20 | 0.40 | 0.70 | 2.50 | 3.00 |
| BH10 | 0.30 | 0.40 | ≤ | 0.40 | 0.35 | 0.35 | 0.75 | 1.10 | 2.80 | 3.20 | 0.30 | 0.50 | 2.65 | 2.95 |
| Country | China | Japan | Germany | USA | UK |
| Standard | GB/T 1299 | JIS G4404 | DIN EN ISO4957 | ASTM A681 | BS 4659 |
| Grade | 3Cr3Mo3V | SKD7 | 1.2365/32CrMoV12-28 | H10/T20810 | BH10 |
4. DIN 1.2365 Tool Steel Physical & Mechanical Properties
Physical Properties
| Property | Metric Units |
|---|---|
| Density | 7.8 g/cm³ |
| Thermal Expansion (20-200°C) | 11.5×10⁻⁶/°C |
| Thermal Conductivity | 28 W/(m·K) |
Mechanical Properties
| Property | Metric Units |
|---|---|
| Hardness (Quenched & Tempered) | 48-52 HRC |
| Tensile Strength | 1600-1800 MPa |
| Impact Toughness (Charpy) | 25-35 J |
Thermal Stability: Retains hardness ≥45 HRC at 600°C.
5. DIN 1.2365 Tool Steel Heat Treatment
Annealing
Heating slowly and uniformly to 750~790℃, furnace cooling to
600℃ at a rate 10~20℃/hr, further cooling in air. Hardness after annealing: max. 205 HB. Suitable precautions must be taken to prevent excessive carburization or decarburization.Stress relieving
600 to 650°C (1112 to 1202°F) Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1 -2 hours.
Hardening
DIN 1.2365 steel is a very deep hardening steel, and although oil quenching may be used where maximum hardness is required, air hardening is recommended for most applications. The use of salt bath or controlled atmosphere furnace is desirable to minimize decarburization, and if not available, pack hardening spent pitch temperature employed is usually in the range of 982°C -1037°C.
1010 to 1050°C (1850 to 1922°F) Oil, salt bath (500-550°C / 932-1022°F), Holding time after temperature equalization: 15 to 30 minutes. Obtainable hardness: 52 -56 HRC
Tempering
Slow heating to tempering temperature immediately after hardening / time in furnace 1 hour for each 20 mm of work piece thickness but at least 2 hours / cooling in air. It is recommended to temper at least twice. A third tempering cycle for the purpose of stress relieving may be advantageous 1st tempering approx. 30°C (86°F) above maximum secondary hardness. 2nd tempering to desired working hard-ness. The tempering chart shows average tem-pered hardness values. 3rd for stress relieving at a temperature 30 -50°C (86 to 122°F) below highest tempering temperature.
6. DIN 1.2365 Tool Steel Applications
DIN 1.2365 is widely used in high-temperature industrial processes:
Hot Work Dies: Aluminum/copper die-casting molds, forging dies, extrusion tooling.
Plastic Molds: High-gloss injection molds requiring thermal stability.
Aerospace & Automotive: Turbine blade molds, engine component dies.
Why Choose DIN 1.2365?
Thermal Fatigue Resistance: 30% longer lifespan than H13 in cyclic thermal loads.
Cost Efficiency: Reduced downtime due to extended tool longevity.
7. Delivery condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed, rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
Hongxin Mold Tech Co.,Ltd. owns 1 set of Hot Rolling Production Line at size range flats 8-80*210-710mm, rounds 16-50mm Dia.
12 sets of Hydraulic Forging Hammers from Power 560kgs to 6000kgs which could cover flats 40-300*210-710mm.
8 sets of EF+LF+VD
5 sets of ESR
9 sets of Milling Machines
10 sets of Turning Lathes
6 sets of Precision Milling Machines.
CERTIFICATION: GB/T19001-2016/ISO9001:2015
Q1:Are you trading company or manufacturer ?
We are the biggest tool steel factory at Daye & Huangshi. We can provide a wide range of steel products.
Q2:What is alloy steel round bar export packing?
Usually bundling for large diameter,small diameter bars in bulk or as customer's demand.
Q3.What is your MOQ?
We accept small order,if it is stock,any quantities can be accepted.
Q4.What is your lead time?
Depends actual order,around 20-35 days,or negotiation.
Q5.Can you supply sample?
Yes,we can.Sample fee according to your size.
Q6:What certificates do you have?
ISO, ABS, BV, CCS, Dnv, Lr, Gl, Mill Certificate
Q7: How can I get your quotation as soon as possible?
The email and fax will be checked within 24 hours,meanwhile,the Skype,Wechat and WhatsApp will be online in 24 hours.Please send us your requirement,we will work out a best price soon.
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