H10 Tool Steel | 1.2365 | X32CrMoV3-3

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Product Introduction

H10 Tool Steel

H10 is a chromium-molybdenum hot work tool steel characterised by low thermal conductivity and insensitivity to temperature changes. Its chemical composition contains 0.35-0.45% carbon, 3.00-3.75% chromium, 2.00-3.00% molybdenum, and small amounts of silicon and manganese, giving it medium corrosion resistance (grade 3/6) and excellent resistance to thermal cracking. Physical properties include a density of 7.78 g/cm³ and a thermal conductivity of 32.8 W/(m-K) in the annealed state; the hardness after heat treatment is up to 50-52 HRC, with performance optimisation to be achieved by quenching in oil or air-cooling at 1000-1030°C and tempering at 450-570°C The steel should be oil quenched or air cooled at 1000-1030°C and tempered at 450-570°C to optimise properties.

1.2365 Tool Steel

1.2365 (corresponding to the German W-Nr/DIN standard) is a high-alloyed hot work tool steel with a composition of 0.28-0.35% carbon, 2.70-3.20% chromium, 2.60-3.00% molybdenum, and 0.40-0.70% vanadium. 0.70%, emphasising high temperature stability and wear resistance. It has a density of 7.85 g/cm³ and a thermal conductivity of 33 W/(m-K) at 400-600°C; heat treatment is by quenching at 1020-1050°C (oil/air-cooling) and tempering at 500-650°C, and hardness can be regulated to 40 -55 HRC, while the yield strength ≥ 730 MPa, elongation ≥ 14%.

X32CrMoV3-3 tool steel

X32CrMoV3-3 (DIN, Germany) has a composition highly consistent with 1.2365: 0.28-0.35% carbon, 2.70-3.20% chromium, 2.60-3.00% molybdenum, 0.40-0.50% vanadium. -0.70%, with emphasis on hardenability and high temperature strength. Physical parameters include a density of 7.85 g/cm³ and a coefficient of thermal expansion (20-100°C) of 11.8 x 10-⁶ K-¹; hardened at 1020-1060°C and tempered at 520-700°C, it reaches a hardness of 50-700°C. After hardening and tempering, it reaches a hardness of 50-700°C. After quenching at 1020-1060°C and tempering at 520-700°C, it has a hardness of 50-52 HRC, a tensile strength of ≥980 MPa and excellent resistance to thermal fatigue.

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Product Types and Options

The table below shows the size range, surface condition and tolerance details for H10,1.2365,X32CrMoV3-3 tool steel:

Shape	Pocess	Size range	Surface	Tolerance
Flat Bar	Hot Rolled	Thickness: 10-400mm Width: 200-800mm Length: 3000-5800mm	Black; Sandblasted	Thickness :0-+2MM Width:0-+5MM/0-+10MM
	Hot Forged	Thickness: 50-500mm Width: 50-1500mm Length: 3000-5800mm	Black	Thickness:+2-+5MM Width:0-+5MM/0-+10MM
			Turned/Machined/Milled/Bright	Thickness :0-+2MM Width:0-+5MM/0-+10MM
Round Bar	Hot Rolled	Diameter:10-65mm Length:3000-5800mm	Black	0-+2MM
			Turned/Machined	0-+2MM
	Hot Forged	Diameter:70-700mm Length:3000-5800mm	Grinded	0-+5MM/+2-+5MM
			Turned/Machined/Milled/Bright	0-+2MM

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Customized Options

1. Customized chemical composition: GB, DIN, ASTM, JIS and other standard grades can be produced. Chemical composition can be customized individually.
2. Customized specifications: round steel (diameter), plate (thickness, width) can be customized production.
3. Specialized packaging for long term storage or extreme transportation conditions: includes spraying black paint all around, wrapping plastic film, spraying anti-rust oil, and shipping in wooden crates.
4. Customized production based on samples or technical agreements.
5. H10,1.2365,X32CrMoV3-3 Hot Work Tool Steel Electroslag Remelting (ESR): premium option with higher purity and isotropic properties for critical applications.

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Chemical Composition

Standard/Steel Grade		Chemical Composition(%)
		C	Si	Mn	Cr	Mo	V
ASTM	H10	0.35~0.45	0.80~1.20	0.25~0.70	3.00~3.75	2.00~3.00	0.25~0.75
DIN/W-Nr.	X32CrMoV3-3/1.2365	0.28~0.35	0.10~0.40	0.15~0.45	2.70~3.20	2.60~3.00	0.40~0.70
JIS	SKD7	0.28~0.35	0.10~0.40	0.15~0.45	2.70~3.20	2.50~3.00	0.40~0.70

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Heat Treatment Process

1.Annealing

Purpose: to eliminate internal stresses generated during forging or rolling, reduce hardness, improve cutting performance, and prepare for subsequent processing and heat treatment.
Process parameters:
Heating temperature: 800-850 ℃, holding time 2-4 hours, with the furnace cooling to below 500 ℃, and then air-cooled.
Hardness after annealing: ≤ 229 HBS.

2.Quenching

Purpose: to make the tool steel to obtain martensitic organization, improve hardness and wear resistance.
Process parameters:
Heating temperature: 1000-1050 ℃ (commonly used 1020-1040

℃), holding time according to the size of the workpiece to determine, generally 30-60 minutes.
Cooling: oil cooling or air cooling (for small size or simple shape of the workpiece), large workpieces can be graded quenching (in the 260-300 ℃ salt bath cooling for a period of time and then air-cooled), in order to reduce the quenching stress, to prevent deformation and cracking.

3.Tempering

Purpose: to eliminate quenching stress, adjust the hardness and toughness, stable organization and size.
Process parameters:
low-temperature tempering: 150-250 ℃, insulation 2-3 hours, air-cooled, tempered hardness of 58-62HRC, for molds requiring high hardness and wear resistance.
Medium temperature tempering: 300-500 ℃, insulation 2-3 hours, air-cooled, tempered hardness of 50-58HRC, can improve the toughness, suitable for molds subject to impact load.
High-temperature tempering: 500 ℃ or more, insulation 2-3 hours, air-cooled, tempered hardness 45-50HRC, mainly for the need for higher toughness of the occasion.

4.Precautions

Heating process should control the rate of heating to avoid too rapid a rise in temperature leading to workpiece surface oxidation and decarburization. Protective atmosphere heating can be used or placed in the furnace charcoal and other anti-decarburization agent.
When quenching and cooling, choose the appropriate cooling medium and cooling method according to the shape and size of the workpiece to ensure the quenching effect while reducing the risk of deformation and cracking.
Tempering must be sufficient to ensure the elimination of internal stresses to avoid mold failure due to stress release during use. For large molds or workpieces with complex shapes, multiple tempering can be used.

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Quality Inspection

1.Surface Condition Inspection

FCS factory has a very strict quality inspection team, we will carefully check the surface condition of each piece of tool steel to ensure that the steel surface is free from cracks, folds, knots, oxidized skin, pitting, scratches and other defects.

2.Chemical Composition Testing

To verify whether the content of alloying elements meets the standard requirements and to safeguard the basis of the mechanical properties of the material. We will let the staff use full-spectrum direct reading spectrometer to analyze multiple elements at the same time. Sampling needs to remove the surface oxidation layer, using a block specimen to stimulate the test.

3.Dimension and Tolerance Inspection

FCS factory will use professional measuring tools to inspect the dimensions and tolerances of the steel to ensure compliance with the customer's contract requirements. Corresponding gauges will be selected according to the dimensional accuracy requirements, including tape measure, high-precision vernier calipers (0.02mm), micrometers (0.001mm), and special inspection gauges. Inspection items cover: diameter, thickness, width, length, hole diameter, chamfering dimensions, etc., to ensure that the tolerances and dimensions meet the contract requirements.

4.Hardness test

Our FCS factory will use professional hardness tester to test the hardness of steel to ensure that it meets the customer's contract requirements.

5.Ultrasonic Testing

Ultrasonic Testing Standard (UT Test Standard) is: Sep 1921-84 Class3 D/d,E/e.
FCS factory uses ultrasonic testing equipment to detect macro defects inside the material (such as cracks, shrinkage holes, inclusions, white spots, etc.), and every piece of round steel and plate will be examined by a second flaw detection test before shipment to ensure that the quality is qualified before shipment.

6.Microstructure Inspection

(1) Metallographic Analysis

FCS factory will use metallographic analysis instrument to detect the microstructure state after heat treatment, including carbide distribution, martensite morphology, residual austenite content, etc.

 (2) Grain size rating

FCS factory will use the comparative method to determine the austenite grain size by comparing the microstructure of the specimen with the standard rating chart, to ensure that it meets the customer's requirements.

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Technical Specifications

Parameter	H10/1.2365/X32CrMoV3-3 Specification Value	Unit	Category
Density	7.85	g/cm³	Physical Properties
Thermal Expansion Coefficient (20-600°C)	11.5 x 10^-6	/K	Physical Properties
Thermal Conductivity	25	W/(m·K)	Physical Properties
Specific Heat Capacity	460	J/(kg·K)	Physical Properties
Elastic Modulus	215,000	N/mm²	Physical Properties
Annealed Hardness	≤ 229	HB	Mechanical Properties
Pre-Hardened Hardness	42-46	HRC	Mechanical Properties
Maximum Hardened Hardness	52-54	HRC	Mechanical Properties
Compressive Strength (50 HRC)	1850	N/mm²	Mechanical Properties
Tensile Strength (50 HRC)	1620	N/mm²	Mechanical Properties
Impact Toughness	12-15	J	Mechanical Properties
Forging Temperature	1100-900	°C	Heat Treatment Parameters
Annealing Temperature	780-820	°C	Heat Treatment Parameters
Hardening Temperature	1050-1080	°C	Heat Treatment Parameters
Tempering Temperature	550-650	°C	Heat Treatment Parameters

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Product Applications

Key application scenarios

Hot Forging Die Applications

In the hot forging process, H10/1.2365 tool steel demonstrates excellent high temperature strength and wear resistance. An industrial forging plant used our 1.2365 steel to make complex forging dies that maintained excellent dimensional stability and surface integrity, even at operating temperatures above 900°C. The steel was used to produce a number of complex forging dies. Especially for precision forgings that require accurate dimensional control, the low distortion properties of H10 steel offer significant advantages, reducing the need for subsequent machining.

Hot extrusion tooling applications

X32CrMoV3-3 tool steel excels in metal extrusion tooling, particularly aluminium profile and copper alloy extrusion dies. A profile producer has extended the service life of its extrusion dies from the traditional 3 months to 5 months by using our die steel. The high wear resistance ensures that the die cavities maintain their precise geometry even at high pressures and temperatures, producing consistent, high-quality profile products.

High-temperature shear tool applications

Shear tools for cutting sheet metal, profiles and bars at high temperatures are another important application for H10/1.2365 steel. These applications require a material with excellent toughness and wear resistance at the same time, and FCS TOOL STEEL steels are precisely heat-treated to ensure sufficient toughness while maintaining high hardness, preventing chipping of the cutting edge and prolonging tool life.

Industry Specific Applications

1. Automotive Industry: die casting dies for aluminium alloy engine components; forging dies for driveline systems; thermoforming tools for chassis components;High-performance exhaust system dies; aerospace industry.
2. Lightweight Alloy Precision Forging Dies: hot forming tools for turbine components; extrusion dies for structural components; high precision hot stamping tools.
3. Consumer Electronics Industry: Smartphone and Tablet PC Heat Sink Extrusion Dies; Lightweight Aluminium Alloy Shell Die Casting Dies; Precision Connector Extrusion Tools; Durable Electronic Equipment Shell Hot Forming Dies
4. Energy Industry: turbine parts forging moulds; power transmission parts extrusion tools; valve parts hot forging moulds; high-pressure equipment parts forming moulds.

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Competitive Advantage Comparison

Performance Characteristics	H10/1.2365/X32CrMoV3-3 from FCS Factory	Common Hot Work Tool Steel	Advantage Explanation
High-Temperature Hardness Retention	Maintains 90% of hardness at 600°C	70-75% retention at 600°C	Longer die service life, reduced downtime for replacements
Thermal Fatigue Resistance	Excellent, slow micro-crack formation	Moderate, earlier thermal crack appearance	Reduced die failure due to thermal cycling
Wear Resistance	Very high	Moderate to good	Maintains precise die cavity dimensions for longer
Toughness Balance	Excellent hardness-toughness balance	High hardness typically leads to low toughness	Reduced risk of fracture and chipping
Dimensional Stability	Minimal distortion during heat treatment	Distortion range: [Not specified]	Higher precision, reduced post-processing requirements
Oxidation Resistance	High, protected by special alloying elements	Moderate	Reduced high-temperature oxidation, extended die surface life

H10 Tool Steel | 1.2365 | X32CrMoV3-3 Customer Success Stories

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H10 Tool Steel | 1.2365 | X32CrMoV3-3 Pricing Structure Information

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H10 Tool Steel | 1.2365 | X32CrMoV3-3 Frequently Asked Questions

Q: Are H10/1.2365 and X32CrMoV3-3 exactly the same steel?
A: Yes, H10 (American AISI standard), 1.2365 (German DIN standard) and X32CrMoV3-3 (European EN standard) are different international standard designations for the same hot work mould steel. They have the same chemical composition and performance characteristics, and differ only in the naming standards.

Q: What are the main advantages of H10 over other hot work mould steels (e.g. H13/1.2344)?
A: Compared to H13, H10/1.2365 has higher hot hardness and thermal fatigue resistance, making it particularly suitable for demanding applications such as aluminium die casting.H10 steel contains a higher proportion of molybdenum and vanadium, which forms a more stable carbide and has a greater ability to maintain its hardness at elevated temperatures. However, H13 offers better corrosion resistance due to its higher chromium content.

Q: What is the difference between H10 tool steel and CrMoV hot work steel?
A: There is no difference, H10/1.2365 tool steel is a CrMoV hot work tool steel and the main alloying elements are chromium (Cr), molybdenum (Mo) and vanadium (V). The combination of these elements provides excellent hot hardness, wear resistance and resistance to thermal fatigue.