AISI 4820H Bolting Products
AISI 4820H is listed in the NICKEL MOLYBDENUM STEEL material family. The reference data below should be checked against the governing product specification, product form and delivery condition before selection or certification.
The reference chemistry table for AISI 4820H lists Carbon (C): Grade-specific / specification dependent; Silicon (Si): Grade-specific / specification dependent; Manganese (Mn): Grade-specific / specification dependent; Chromium (Cr): Grade-specific / specification dependent. Confirm exact limits and analysis tolerances against the governing standard and product form.
The mechanical-property table for AISI 4820H lists Tensile Strength: Specification / condition dependent MPa; Yield Strength: Specification / condition dependent MPa; Elongation: Specification / condition dependent %; Hardness: Specification / condition dependent HB / HRC. These are reference entries; supplied condition, dimensions, test method and governing specification control the requirements, and the figures are not design allowables.
Werkstoff / EN cross-reference for AISI 4820H: 1.7149. This comparison does not guarantee interchangeability; confirm chemistry, product form and condition against the governing specification.
View Technical Information →Identification information for AISI 4820H. Exact designation equivalents depend on the governing material standard and product form.
The reference chemistry table lists Carbon (C): Grade-specific / specification dependent; Silicon (Si): Grade-specific / specification dependent; Manganese (Mn): Grade-specific / specification dependent; Chromium (Cr): Grade-specific / specification dependent. Confirm the governing standard, product analysis tolerances and product form before ordering.
| Element | Symbol | Composition |
|---|---|---|
| Carbon | C | Grade-specific / specification dependent |
| Silicon | Si | Grade-specific / specification dependent |
| Manganese | Mn | Grade-specific / specification dependent |
| Chromium | Cr | Grade-specific / specification dependent |
| Nickel | Ni | Grade-specific / specification dependent |
| Molybdenum | Mo | Grade-specific / specification dependent |
| Vanadium | V | Grade-specific / specification dependent |
| Other Alloying Elements | — | Grade-specific / specification dependent |
| Other Elements | — | Grade-specific / specification dependent |
The table reports Tensile Strength: Specification / condition dependent MPa; Yield Strength: Specification / condition dependent MPa; Elongation: Specification / condition dependent %; Hardness: Specification / condition dependent HB / HRC as reference data for AISI 4820H. Actual requirements depend on condition, dimensions, test method and specification; these values are not design allowables.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | Specification / condition dependent | MPa |
| Yield Strength | Specification / condition dependent | MPa |
| Elongation | Specification / condition dependent | % |
| Hardness | Specification / condition dependent | HB / HRC |
Indicative physical-property values for alloy steels; exact values vary by grade and should be confirmed from the relevant specification.
Nickel molybdenum steels are low-alloy steels developed to provide useful hardenability, strength and toughness through the combined effects of nickel and molybdenum. Exact characteristics vary with the individual grade, product form and heat-treatment condition.
Nickel and molybdenum additions can improve hardenability and support through-section property control.
The family is used where useful strength must be combined with toughness and reliable heat-treatment response.
Mechanical properties are strongly dependent on the specified heat treatment, section size and material condition.
Different grades cover different combinations of carbon content, alloy content and hardenability requirements.
AISI 4820H belongs to the nickel molybdenum steel family and is selected for applications where the relevant strength, hardenability, wear resistance or toughness requirements are met by the specified grade and condition.
Selected grades are used for gears, shafts and other power-transmission components.
Used for machined and forged components where strength and toughness are required.
Selected grades are used for high-strength industrial fasteners and forgings.
Used in engineered components where hardenability and heat-treatment response are important.
Select the exact AISI 4820H specification, product form and supply condition according to the required strength, toughness, wear resistance and service environment.
Heat-treatment parameters are grade-specific. Use the applicable specification and qualified processing procedure for hardening, tempering or case hardening.
Final mechanical properties depend on grade, section size and material condition. Confirm the required tensile strength, yield strength and hardness before selection.
The commonly listed Werkstoff / EN cross-reference for AISI 4820H is 1.7149. Treat this as a grade comparison, not a guarantee of interchangeability. Verify chemistry, product form, condition and governing specification against the supplier certificate before substitution.
The listed alloy-steel and tool-steel grades are generally selected for heat-treated service, but the exact treatment depends on the grade and required material condition.
Typical uses depend on the exact grade and condition and may include machinery parts, gears, shafts, fasteners, tooling or spring components within the relevant material family.
Use the applicable AISI, SAE or other governing specification and the material certificate for the supplied product form and condition.
Our engineering team can help you select suitable materials based on operating temperature, pressure and service conditions.