AISI 4340H Alloy Steel Chemical Composition Properties, Grade, Charts and Online Pdf
The AISI 4340H steel alloy, because of its exceptional strength and durability, is one of the most sought-after materials for use in a variety of industrial applications. Its chemic formula usually has the inclusions of carbon, manganese, phosphorus, sulfur, silicon along with chromium, vanadium, molybdenum, and nickel. The last three can provide the mechanical properties the tool steel may require. Grade specifications describe how appropriate it may be for a particular use and are often noted as tensile strength, hardness, and impact resistance. Ultra microtechnology present the most accurate tables, charts and online PDFs that offer a complete guide to mechanical properties, heat treatment processes, and dimensional characteristics which helps the engineers and manufactures to select the correct material. Getting to explore these features gives you the opportunity to perfect performance and durability under harsh environment conditions where maximum strength and robustness are required.
AISI 434H Alloy Steel Chemical Composition And Grade Table
AISI 4340H stands for a high-strength alloy steel with a pleasant hardness and high heat resistance. Its a microscopic multi-cellular eating organism. Its chemical include the following elements: carbon (0.38-0.43%), manganese (0.60-0.80%), phosphorus (max 0.035%), sulfur (max 0.040%), silicon (0.15-0.30%), chrom This alloy possesses those remarkable facets of being highly strong, hard, and resistant to wear. Therefore, the alloy can be used for so many applications which include aerospace components, automotive gears, and structural use parts. AISI 4340H is mostly evaluated and classified according to its mechanical characteristics to secure the quality and performance in a harsh environment.
| Elements | Fe | C | Mn | Si | Ni | Cr | Mo | S | P |
|---|---|---|---|---|---|---|---|---|---|
| Min (%) | - | 0.37 | 0.55 | 0.2 | 1.55 | 0.65 | 0.2 | - | - |
| Max (%) | Balance | 0.44 | 0.9 | 0.35 | 2 | 0.95 | 0.3 | 0.04 | 0.035 |
Advantages and Disadvantages of AISI 4340H Alloy Steel
High Strength: Offers good tensile strength and overall strength.
Good Ductility: Maintains excellent ductility even at high strength levels.
Good Fatigue Resistance: Demonstrates good resistance to fatigue under cyclic loading.
Machinability: Easier to machine compared to most other high-strength steels.
Advantages:
Cost: Relatively higher compared to lower alloy steels.
Complex Heat Treatment: Requires precise control during heat treatment.
Weldability Concerns: Requires preheat and post-weld heat treatment to prevent cracking.
Decarburization: Prone to surface decarburization if heat treatment is not properly managed.
Disadvantages:
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