AISI 4320H Alloy Steel Chemical Properties, Grade, Charts and Pdf
AISI 4320H is a superior-grade alloy steel material that offers both high hardness and toughness. Besides atmospheres, alloys having compositions of chromium, molybdenum, and nickel offer the best performance of wear and tear in very demanding applications such as gears, shafts, and other working equipment under extreme conditions of heavy load and high stress. This grade shows itself to be outstanding in regard to hardness and machining ability which makes it suitable both for producing as well as various other machine processes. AISI 4320H Nitalloy steel is furnished with mechanical property tables and charts as well as PDFs for its heat treatment guidelines, thus enabling engineers and manufacturers deploy the material efficiently for their projects. This is a reason for it to be most often used in industries that require occasional or intensive operation and where reliability and durability mean a lot.
AISI 4320H Alloy Steel Chemical Composition And Grade Table
AISI 4320H Alloy steel belongs to low-alloy, nickel -chromium-molybdenum, case-hardening steel and has an excellent reputation for its high strength & toughness properties. A typical chemical composition of batteries consists mainly of carbon (C), manganese (Mn), silicon (Si), sulfur (S), phosphorus (P), chromium (Cr), nickel (Ni), molybdenum (Mo) and others trace elements. This AISI 4320H is available in various grade sets in compliance with the ASTM A29 and the SAE J404 standard. The steel grade which is usually utilized in application of high core strength, e.g. gears, shafts and other mechanical components covering crash and wear loads, is categorized as this steel grade.
| Elements | Iron, Fe | Nickel, Ni | Manganese, Mn | Chromium, Cr | Molybdenum, Mo | Carbon, C | Silicon, Si | Sulfur, S | Phosphorous, P |
|---|---|---|---|---|---|---|---|---|---|
| Min (%) | 95.745 | 1.55 | 0.4 | 0.35 | 0.2 | 0.17 | 0.15 | - | - |
| Max (%) | 97.18 | 2 | 0.7 | 0.65 | 0.3 | 0.23 | 0.3 | ≤0.040 | ≤0.035 |
Advantages and Disadvantages of AISI 4320H Alloy Steel
Good Hardenability: Capable of achieving good hardness through heat treatment.
High Toughness: Retains hardness at higher levels and ages.
Good Fatigue Resistance: Resistant to fatigue and impact.
Machinability: Less difficult to machine compared to some higher alloy steels.
Advantages:
Limited Hardenability Depth: Not suitable for very deep hardening.
Lower Strength Compared to Higher Alloyed Steels: May exhibit lower strength under certain conditions.
Limited Wear Resistance: Not as wear-resistant as higher-alloyed steels.
Prone to Distortion During Quenching: Requires careful heat treatment to prevent distortion.
Disadvantages:
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