AISI 1078 High Carbon Steel Bolting Products
AISI 1078 High Carbon Steel is listed in the HIGH CARBON 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 1078 High Carbon Steel lists Carbon (C): 0.72 – 0.80%; Silicon (Si): 0.15 – 0.30%; Manganese (Mn): 0.30 – 0.60%; Phosphorus (P): 0.04% Max. Confirm exact limits and analysis tolerances against the governing standard and product form.
The mechanical-property table for AISI 1078 High Carbon Steel lists Tensile Strength: 720 – 940 MPa; Yield Strength: 440 – 620 MPa; Elongation: 8 – 16 %; Hardness: 200 – 270 HB. These are reference entries; supplied condition, dimensions, test method and governing specification control the requirements, and the figures are not design allowables.
No one-to-one Werkstoff number was verified for AISI 1078 High Carbon Steel in the cross-reference sources checked for this update. Confirm any proposed EN alternative against the governing specification.
View Technical Information →Standard identification and material designation information for AISI 1078 High Carbon Steel.
The reference chemistry table lists Carbon (C): 0.72 – 0.80%; Silicon (Si): 0.15 – 0.30%; Manganese (Mn): 0.30 – 0.60%; Phosphorus (P): 0.04% Max. Confirm the governing standard, product analysis tolerances and product form before ordering.
| Element | Symbol | Composition |
|---|---|---|
| Carbon | C | 0.72 – 0.80% |
| Silicon | Si | 0.15 – 0.30% |
| Manganese | Mn | 0.30 – 0.60% |
| Phosphorus | P | 0.04% Max |
| Sulfur | S | 0.05% Max |
| Chromium | Cr | 0.40% Max |
| Nickel | Ni | 0.40% Max |
| Molybdenum | Mo | 0.15% Max |
| Iron | Fe | Balance |
The table reports Tensile Strength: 720 – 940 MPa; Yield Strength: 440 – 620 MPa; Elongation: 8 – 16 %; Hardness: 200 – 270 HB as reference data for AISI 1078 High Carbon Steel. Actual requirements depend on condition, dimensions, test method and specification; these values are not design allowables.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 720 – 940 | MPa |
| Yield Strength | 440 – 620 | MPa |
| Elongation | 8 – 16 | % |
| Hardness | 200 – 270 | HB |
AISI 1078 High Carbon Steel combines a relatively high carbon level with heat-treatment capability. The selected grade is used where strength, hardness, wear performance or hardenability are important.
The carbon content supports higher hardness after suitable quenching and tempering.
The grade is used for selected spring and resilient components.
Heat-treated material can provide useful resistance to wear and edge deformation.
Machinability depends strongly on supplied hardness and the selected processing condition.
AISI 1078 High Carbon Steel is selected for applications where strength, hardness, wear resistance or controlled hardenability are important.
Selected for spring strips, clips and resilient components.
Used for knives and cutting components requiring higher hardness.
Selected for parts exposed to abrasive or sliding wear.
Used for selected shafts, pins and machine components after appropriate treatment.
Specify condition and heat-treatment requirements before fabrication.
Higher hardness should be balanced against the toughness required for the application.
Critical parts should be validated using certified chemistry and mechanical test results.
No one-to-one Werkstoff number was verified for AISI 1078 High Carbon Steel in the cross-reference sources checked for this update, so this page does not assign a number. Confirm any proposed EN alternative against the applicable product standard and supplier certificate before substitution.
Our engineering team can help you select suitable materials based on operating temperature, pressure and service conditions.