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Introducción
H11
H11 steel is also called AISI H11 or 1.2343,which is a kind of chromium-molybdenum-vanadium alloy steel with excellent hardenability,toughness and high temperature strength.After heat treatment,this kind of steel can get high temperature and good wear resistance.it is suitable for manufacture hot working mold can bear heavy loads and impacts,such as hammer forging molds,hot forging dies for aluminum and magnesium alloys.H11 steel has good strength and toughness under high temperature,and low heat deformation rate.It is suitable for manufacturing large or complex mold parts.
H13
H13 steel is also called AISI H13 or 1.2344,it is a kind of chromium-molybdenum-vanadium alloy steel with a high content of molybdenum and vanadium which makes it has excellent toughness,wear resistance,and high temperature strength.After heat treatment,H13 can obtain a extremely high hardness and strength,and maintain good toughness at the dame time.This kind of steel widely used in hot working molds,such as die casting molds,forging molds,extrusion molds and plastic molds.H13 steel has especially great performance at high temperature,it is suitable for manufacturing components can bear high temperature and abrasion.
Chemical composition
H11 and H13 both are chromium hot working mold steel,which is widely used to manufacture die casting molds,forging molds and extrusion molds.The main difference between them are the chemical composition and performance after heat treatment.
H11
| C | Si | Mn | P | S | Cr | Mo | V |
| 0.33-0.41 | 0.8-1.2 | 0.25-0.5 | Max 0.03 | Max 0.02 | 4.8-5.5 | 1.1-1.5 | 0.3-0.5 |
H13
| C | Si | Mn | P | S | Cr | Mo | V |
| 0.35-0.42 | 0.8-1.2 | 0.25-0.5 | Max 0.03 | Max 0.02 | 4.8-5.5 | 1.2-1.5 | 0.85-1.15 |
Mechanical properties
| H11 | H13 | |
| Tensile strength | 900-1000 MPa | 1500-1600 MPa |
| Yield strength | 600-800 MPa | 1300-1400 MPa |
| Elongation | 10-20% | 1-2% |
| Dureza | HRC48-50 | HRC45-55 |
Delivery Condition
The surface delivery condition of H11 and H13 steel depends on their heat treatment process and intended usage.The annealed condition provide good processing performance and a certain hardness,but the quenching and tempering condition provide higher hardness and wear resistance,which is suitable for applications requires higher strength and wear resistance.
Common features
- High temperature strength:Both two steels have good high temperature strength,and can maintain enough hardness and strength to resist deformation and abrasion.
- Thermal stability:They all can maintain stable performance in high temperature environment,which is crucial for hot working molds.
- Hardenability:H11 and H13 steel both have high hardenability,which means they can be harden evenly across the entire section.This is important for large or complex shaped molds.
- Toughness:Both of the steels have good toughness,and they can resist bring in the impact and thermal fatigue cracks which is very important for molds that bear thermal cycles and mechanical shock.
- Wear resistance:They all have good wear resistance,and they can resist molds abrasion for a long time,and extend the service life for molds.
- Hot crack resistance:H11 and H13 steel both can working in high temperature and pressure without cracking,which is critical for the durability and reliability of hot working molds.
- Process ability:H11 and H13 steel can be proceed by regular mechanical working process,such as milling,rough turned and grinding.
- Weld ability:Both two steels are weldable,this is beneficial for mold repair and modification.
Difference
H11 has a little bit higher plastic toughness and carbon content,it is suitable for manufacturing high-precision,complex shaped molds.But H13 has higher hardness and strength,and better medium-temperature performance,it is suitable for large scale,high pressure and high temperature molds manufacturing.It also has high vanadium content,which provide better wear resistance and thermal cracking resistance.
Aplicación
H11 usually used in molds that has high requirements of machinability and toughness,such as manufacture die-casting molds,plastic injection molds,cold punching and wear resistant parts.
H13 performs better in the high temperature and high pressure environment,usually used in hot forging molds,hot extrusion molds,die-casting molds,plastic molds,etc.
How to Choose
When choosing H11 and H13 steel the following factors should be considered:
- Performance requirements:If components or molds require extremely high wear resistance and hardness,H11 is a suitable choice.When the occasions require good thermal stability and thermal fatigue resistance at high temperature,H13 may be more suitable.
- Cost consideration:When choosing steels,cost also should be considered.H11 and H13 steel may different from price,your choice should be made based on the budget and performance requirements.
- Heat treatment:Heat treatment is an important factor that affect steel performance.According to the harness,wear resistance,and corrosion resistance as you required,appropriate heat treatment can optimize the steel performance.
Conclusion：H11 VS H13
H11 and H13 steel both are hot working mold steel with high performance chromium-molybdenum,H11 has high content of molybdenum and good toughness,so its machinability is suitable for making wear resistant parts such as metal molds,plastic molds,and extrusion gun head,etc.However H13 is widely used to manufacture hot stamping molds,hot extrusion molds,and cold extrusion molds that require high temperature stability and impact resistance due to its higher carbon content and excellent heat treatment ability.Users should choose the acero according to the specific application requirements,cost budget and heat treatment conditions.
