Ever wondered what gives a reliable kitchen knife its sharp edge or makes a surgical instrument so durable? Often, the answer is a cost-effective, high-performance material like 3Cr13 stainless steel.
3Cr13 steel is a Chinese martensitic stainless steel grade known for its moderate corrosion resistance, high hardness (up to 52-55 HRC after quenching), and excellent wear resistance. In 2026, it remains a top choice for industrial knives, surgical instruments, and mechanical wear parts. It is the Chinese GB standard equivalent to AISI 420B and JIS SUS420J2.
As a leading international metal supplier, we at Huaxiao Metal frequently work with 3Cr13. This guide provides a comprehensive look at this versatile steel, covering everything from its chemical makeup to its most common applications.
Whether you’re an engineer, a product designer, or a purchasing manager, this article will help you understand if 3Cr13 is the right choice for your next project.
If you’re looking for reliable 3Cr13 steel suppliers or want to check current 3Cr13 steel prices, Huaxiao Metal offers high-quality products and competitive quotes.
👉 Contact us for a quote now
What is 3Cr13 Steel?
3Cr13 is a chromium-containing martensitic stainless steel defined under Chinese GB standards. It contains approximately 12–14% chromium, which provides basic corrosion resistance, while its carbon content enables heat treatment to achieve high hardness.
After proper quenching and tempering, 3Cr13 steel offers:
Good hardness and wear resistance
Moderate corrosion resistance
Excellent machinability and polishability
Lower cost compared with high-alloy stainless steels
Due to these characteristics, 3Cr13 steel is widely used in cost-sensitive applications that require both performance and durability.
Looking for reliable 3Cr13 steel suppliers? Contact Huaxiao Metal for stock availability and price quotations today.
3Cr13 Steel Equivalent Grades
If you work with international partners, you need to know how 3Cr13 steel is designated across different standards. This helps ensure clear communication and material consistency.
| Standard | Grade |
| GB/T (China) | 3Cr13 |
| AISI/ASTM (USA) | 420B / S42000 |
| JIS (Japan) | SUS420J2 |
| DIN EN (Germany) | X30Cr13 / 1.4028 |
Huaxiao Metal provides 3Cr13 stainless steel that complies with GB/T, ASTM, and JIS standards to meet diverse project requirements.
Chemical Composition of 3Cr13 Steel
The chemical composition of 3Cr13 stainless steel plays a critical role in its performance.
| Element | Content |
|---|---|
| C | 0.26 – 0.35% |
| Si | ≤ 1.00% |
| Mn | ≤ 1.00% |
| P | ≤ 0.035% |
| S | ≤ 0.030% |
| Cr | 12.00 – 14.00% |
| Ni | ≤ 0.60% |
This composition enables 3Cr13 to achieve good hardness after heat treatment while maintaining a moderate level of corrosion resistance – ideal for mid-range industrial and consumer applications.
3Cr13 Process Performance
Hot Working?
3Cr13 steel hot working temperature range of 850 ~ 1200 ℃, the appropriate hot working heating temperature of 1160 ~ 1200 ℃, before 850 ℃ should be slowly heated, cold loading furnace temperature should be less than 800 ℃. After hot working slow cooling or timely annealing.
Cold Working?
3Cr13 steel cold workability is poor, not recommended for cold working operations, but 3Cr13 steel can produce cold drawn steel, cold rolled sheet and wire.
3Cr13 Corresponding Grades
1, the national standard GB-T standard: digital grade: S42030, the new grade: 30Cr13, the old grade: 3Cr13,
2, the American standard: ASTMA standard: S42080, SAE standard: a, UNS standard: 420,
3, the Japanese standard JIS standard: sus420J2,
4, the German standard DIN standard: 1.4028,
5, the European standard EN standard: X30Cr13, French standard NF standard: z33c13.
3Cr13 Physical Properties
①Density Density (20 ℃) / kg / dm3: 7.76,
②Melting point/°C:1365,
③Specific heat capacity (0~100℃)/kg/(kg.k):0.17,
④ Thermal conductivity/w/(m.k)100℃-:25.1,
⑤ Thermal conductivity/w/(m.k)500℃-:25.5,
⑥ Coefficient of linear expansion/(10-6/k)0~100℃:10.5,
⑦Coefficient of linear expansion/(10-6/k)0~594℃:12,
⑧ Resistivity (20℃)/(.mm2/m):0.52,
⑨Longitudinal modulus of elasticity(20℃)/GPa:219,.
⑩Magnetic:Yes
3Cr13 Mechanical Properties
| Property | Annealed | Quenched and Tempered |
|---|---|---|
| Tensile Strength (MPa) | 520 – 700 | 750 – 950 |
| Yield Strength (MPa) | ≥ 275 | ≥ 500 |
| Elongation (%) | 20 | 12 |
| Hardness (HRC) | ≤ 30 | 45 – 55 |
3Cr13 heat treatment:
① hardness HBW ≤: annealed 235, quenched and tempered 217, hardness HRB ≤: 99,
② heating temperature: 800 ~ 900,
③ heating mode: air cooling or slow cooling.
3Cr13 application areas: mainly used for high-strength parts and bear high strength pressure load and wear parts under the condition of corrosive media, such as cutting tools and springs working below 300 degrees, and working shafts below 400 degrees. Bolts, valves, bearings, et
After proper quenching and tempering, the hardness of 3Cr13 steel can reach HRC 55, which is suitable for manufacturing cutting tools and wear-resistant parts.
Characteristics
The carbon content of 3Cr13 steel is less than 0.35, the hardness obtained after heat treatment is only HRc52-55, and the resistance to damage and other aspects of the performance are not too outstanding. Because it is easier to cut and polish, it is suitable for mass production of factory-made knives, 420 steel is also due to the low carbon content and excellent rust resistance, so it is also the production of cutting tools of the ideal steel.
3Cr13 stainless steel has a certain degree of abrasion resistance corrosion resistance, and high hardness, the price of its stainless steel ball is the lower class, suitable for stainless steel common requirements of the working environment.
Apply to all kinds of precision machinery, bearings, electrical, equipment, instruments, meters, transportation tools, household appliances, and so on. Mostly used in the manufacture of parts resistant to atmospheric, water vapor, water, and oxidizing acid corrosion.2Cr13 stainless steel: high hardness after quenching, good corrosion resistance (magnetic) 3Cr13 stainless steel quenched, then the hardness of 2Cr13 steel rises (magnetic).
3Cr13 steel is martensitic stainless steel used after quenching and tempering. Relative to 1Cr13, 2Cr13 steel has higher strength, hardness, and hardenability, but its corrosion resistance and thermal stability below 700 ℃ is lower than 1Cr13, 2Cr13 steel. Cold working properties and welding performance are not good, heat treatment should be done immediately after welding to prevent Cracking. In the annealed state has good cutting performance.
Mechanical Properties
Tensile strength (MPa): quenched and tempered, ≥735
Conditional yield strength 0.2 (MPa): quenched and tempered, ≥540
Elongation:quenched and tempered,≥12%.
Section shrinkage? (%): quenched and tempered, ≥40
Impact work Akv (J): quenched and tempered,≥24
Hardness Annealed,≤235HB;quenched and tempered,≥217HB
Density 7.75g/cm3
Heat Treatment
Unlocking the full potential of 3Cr13 steel requires precise heat treatment.
Annealing: The steel is heated to around 800-900°C and then slowly cooled. This softens the steel, making it easy to machine and work with.
Quenching: For hardening, it’s heated to 920-980°C and then rapidly cooled in oil or air. This creates the hard martensitic structure.
Tempering: After quenching, the steel is brittle. It’s then heated to a lower temperature (typically 150-350°C) and held for a period to reduce brittleness and increase toughness.
Proper heat treatment can significantly improve toughness and mechanical performance.
After heat treatment, 3Cr13 reaches a hardness of 52-55 HRC, making it highly versatile for various industrial applications. However, depending on your specific project, you might want to compare 3Cr13 with other industrial knife steels like 440C or 5Cr15MoV to find the perfect fit for your production.
Huaxiao Metal can provide 3Cr13 steel in both annealed and quenched forms upon request – ideal for machining or final assembly applications.
Welding and Machining Characteristics
Weldability: Not recommended unless preheated and post-weld treated.
Machinability: Good when softened (annealed state).
For high-precision 3Cr13 machining or cutting parts, Huaxiao Metal provides custom processing services.
Pros and Cons of 3Cr13 Steel
To make an informed decision, it’s crucial to understand both the advantages and limitations.
Advantages of 3Cr13
Excellent Cost-Performance Ratio: You get great hardness and decent corrosion resistance for a very competitive price.
High Hardness & Good Wear Resistance: When properly heat-treated, it stands up well to abrasion and wear.
Easy to Sharpen: Users can easily restore a sharp edge, which is a major benefit for knife applications.
Good Machinability: In its annealed state, it is relatively easy to machine and form.
Limitations of 3Cr13
Moderate Corrosion Resistance: It is not suitable for marine or highly chemical environments. In such cases, austenitic steels like 304 or 316 would be a better choice.
Lower Toughness: Compared to lower-carbon steels, it can be more brittle, especially when hardened to its maximum level.
Which is Better for Knives? (3Cr13 vs. 420J2)
Conclusion: Both 3Cr13 and 420J2 (or its American equivalent, AISI 420B/420C) are cost-effective martensitic stainless steels ideal for cutting and shearing tools.
Choose 3Cr13 if: You require excellent value and high volume for standard everyday cutlery and pocket knives, where re-sharpening ease is a key feature.
Choose 420J2 if: You need marginally higher hardness or slightly superior resistance to rust for items like affordable surgical instruments or specialty shears.
Essential Distinction: 3Cr13 vs. 304 Stainless Steel
Many customers mistakenly assume all stainless steels offer similar performance. In reality, 3Cr13 and 304 stainless steel serve fundamentally different purposes. They belong to completely separate families of stainless steel:
3Cr13 (Martensitic Steel): The “Hardness” Grade. The primary strength of 3Cr13 is its ability to be hardened through heat treatment. This martensitic structure allows it to achieve high HRC levels (52-55 HRC), making it ideal for cutting tools, shafts, and wear-resistant mechanical parts. Its corrosion resistance is only “good,” suitable for mild conditions.
304 (Austenitic Steel): The “Corrosion” Grade. The strength of 304 lies in its superior corrosion and oxidation resistance (especially in high-moisture or chemical environments). However, it cannot be hardened significantly by heat treatment, remaining relatively soft. It is magnetic only when cold-worked, unlike 3Cr13 which is strongly magnetic.
Simply put: If you need to cut or resist wear, choose 3Cr13. If your priority is maximum resistance to rust and chemicals (e.g., food processing, structural tubing), choose 304.
2026 Comparison: 3Cr13 vs. 4Cr13 vs. 2Cr13
| Grade | Carbon Content | Hardness (HRC) | Best For |
| 2Cr13 | Lower (0.16-0.25%) | 45-50 | Turbines, bolts |
| 3Cr13 | Medium (0.26-0.35%) | 52-55 | Industrial knives, tools |
| 4Cr13 | Higher (0.36-0.45%) | 55-58 | Surgical tools, high-end cutlery |
Applications of 3Cr13 Stainless Steel
Thanks to its balanced properties, 3Cr13 is used across a wide range of industries.
Knives and Cutlery: This is its most famous application. From affordable kitchen knives and pocket knives to multi-tools, 3Cr13’s ability to hold an edge and resist food-related stains makes it a top choice.
Surgical and Dental Instruments: Its good corrosion resistance and ability to be sterilized make it suitable for scalpels, clamps, and other medical tools.
Hand Tools: Used for scissors, shears, and other cutting implements that require a durable edge.
Mechanical Parts: It is fabricated into shafts, bolts, valves, and pump parts that operate in mildly corrosive environments.
Automotive Components: Used for parts that require good wear resistance, such as brake discs.
If your business needs 3Cr13 stainless steel stock, Huaxiao Metal offers bulk supply options with global shipping.
3Cr13 steel is widely used in knives. To learn more about knife-making steel selection and comparison, see our Knife Making Steel Guide
📩 Request 3Cr13 stainless steel prices today!
Real Case Study: How Huaxiao Metal Customizes 3Cr13
Case Study: Providing High-Precision 3Cr13 Solutions for a Surgical Instrument Manufacturer
Customer Challenge: An international surgical instrument manufacturer required a batch of high-standard 3Cr13 flat steel for use in surgical blades. The challenge was that the tempering hardness of the conventionally available product was inconsistent, resulting in low blade yields.
Huaxiao Metal’s Solution:
We collaborated with the customer’s technical team to precisely target the required final hardness within a narrow range of HRC 53-54.
We customized a “double tempering” process, precisely controlling the tempering temperature and time to ensure the steel exhibited maximum edge retention and minimized brittleness.
Results: The customer reported that using Huaxiao’s customized 3Cr13 material increased the life of their surgical blades by 18% and reduced scrap rates in the subsequent polishing and cutting stages by 15%.
If you have special requirements for high-precision heat-treated 3Cr13 steel, please contact our engineering team.
Available Forms & Specifications
Huaxiao Metal supplies 3Cr13 stainless steel in multiple forms:
3Cr13 steel plates & sheets
3Cr13 steel bars & rods
3Cr13 steel strips
Customized sizes and cut-to-length service
We support custom heat treatment, surface finishing, and export packaging based on customer requirements.
If you are looking for a reliable 3Cr13 stainless steel supplier, we can support both small trial orders and long-term supply contracts.
FAQ
Can 3Cr13 rust?
Yes, it is stainless steel, but it is not rust-proof. With 13% Chromium, it resists corrosion well in normal conditions, but long-term exposure to salt or harsh chemicals requires proper maintenance.
Is 3Cr13 steel good for knives?
Yes, it is excellent for budget-to-mid-range knives. It offers great hardness, holds an edge well, is easy to resharpen, and provides sufficient corrosion resistance for everyday use.
Is 3Cr13 steel magnetic?
Yes, 3Cr13 steel is magnetic.
3Cr13 is a martensitic stainless steel, and its crystal structure (martensite) is inherently ferromagnetic. Unlike austenitic stainless steels like 304 or 316, 3Cr13 is magnetic in both the annealed and hardened state.
Can 3Cr13 steel be welded?
3Cr13 steel is not recommended for complex welding applications, or at least requires extremely careful procedures.
As a high-carbon martensitic steel, 3Cr13 is susceptible to forming a brittle martensitic structure in the heat-affected zone during welding, leading to the risk of cold cracking. If welding is necessary, rigorous preheating and subsequent post-weld heat treatment (PWHT) are required to relieve stress and restore toughness.
How does 3Cr13 compare to 440C?
440C has higher carbon and chromium, offering better hardness and corrosion resistance, but at a higher cost.
How does 3Cr13 compare to 304 stainless steel?
They serve different purposes. 3Cr13 is prized for its high hardness and is used for cutting tools. 304 is prized for its superior corrosion resistance but is much softer and cannot be hardened by heat treatment.
What is the Rockwell hardness of 3Cr13 steel?
After proper quenching and tempering, 3Cr13 typically achieves a Rockwell C hardness (HRC) of 52 to 55, making it ideal for cutting applications.
Does Huaxiao Metal provide customized cutting for 3Cr13?
Yes, we offer custom sizes, thicknesses, and surface finishes according to client requirements.
As a professional 3Cr13 steel supplier and manufacturer, Huaxiao Metal offers customized services, including:
Custom sizes and shapes (plate, strip, bar, wire).
Custom heat treatment: Based on the customer’s end-use application (e.g., tool, spring, or shaft), we precisely control quenching and tempering parameters to ensure the hardness and toughness meet the customer’s specific engineering requirements (e.g., HRC 53±1).
How to get the best price for 3Cr13 sheets?
Contact a direct manufacturer like Huaxiao Metal. We provide 2026 updated pricing for cold-rolled and hot-rolled 3Cr13 products.
Why Choose Huaxiao Metal as Your 3Cr13 Steel Supplier?
Over 15 years of stainless steel manufacturing experience
ISO-certified quality assurance
Competitive prices and fast delivery
Support for custom dimensions and surface finishes
Global export service and multilingual support
📦 Large stock available – Inquire now to get a free quote!
📩 Contact Us for 3Cr13 Stainless Steel Prices
If you’re looking for 3Cr13 stainless steel for sale or need a trusted 3Cr13 steel manufacturer in China, don’t hesitate to get in touch with Huaxiao Metal.
In Conclusion
3Cr13 stainless steel is a versatile and economical martensitic steel widely used for blades, mechanical parts, and tools requiring high hardness and moderate corrosion resistance.
When sourced from a reliable supplier like Huaxiao Metal, you get not only consistent quality and competitive prices but also complete technical and customization support.
