303 Stainless Steel
Mat Grades internal verification confirms source-backed fidelity and data integrity. It does not constitute external certification, ASTM/CDA endorsement, or guaranteed material conformity for procurement.
Key Engineering Properties
Representative source rows, qualified by their reported conditions. Inspect the tables below for all values, limits, and source notes.
Engineering Summary
303 Stainless Steel. Source-scoped engineering data is shown with its reported limits and conditions. Unreported properties are not inferred.
Recognized Aliases
Source-backed commercial trade name and short designations cataloged in canonical data.
Standard Designations & Applicable Specifications
Semantically classified designations distinguishing primary standard identifiers, commercial trade names, and applicable specification references.
| System | Identifier | Standard System Name | Classification Notes & Provenance |
|---|---|---|---|
| TYPEPRIMARY | 303 | Producer-referenced stainless type | —Ref: Practical Data for Metallurgists, 19th edition |
| Standards Body | Specification Code | Specification Title / Scope | Relationship Type |
|---|---|---|---|
| 303 | 303 Stainless Steel Engineering Datasheet | Applicable specification reference. | Specification Reference |
Chemical Composition (Weight %)
Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).
| Element | Symbol | Atomic No. | Semantic Basis | Specified Value | Unit | Metallurgical Notes & Qualification | Data Status |
|---|---|---|---|---|---|---|---|
| Carbon | C | 6 | MAXIMUM | ≤ 0.15 | wt% | Source cell: .15max. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Manganese | Mn | 25 | MAXIMUM | ≤ 2.00 | wt% | Source cell: 2.00max. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Silicon | Si | 14 | MAXIMUM | ≤ 1.00 | wt% | Source cell: 1.00max. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Phosphorus | P | 15 | MAXIMUM | ≤ 0.20 | wt% | Source cell: .20max. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Sulfur | S | 16 | MINIMUM | ≥ 0.15 | wt% | Source cell: .15min. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Chromium | Cr | 24 | RANGE | 17.00 – 19.00 | wt% | Source cell: 17.00/19.00. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Nickel | Ni | 28 | RANGE | 8.00 – 10.00 | wt% | Source cell: 8.00/10.00. Scope: p22, Type 303.Ref: Metallus | VERIFIED |
| Molybdenum | Zr, Mo | 42 | EACH | ≤ 0.6 each | wt% | Only when intentionally added (producer option)Zr and Mo each 0.60 wt% maximum at producer option, reported only when intentionally added. No sum or mandatory addition is inferred.Ref: Metallus | VERIFIED |
Physical Properties
Source-specific physical properties. Test temperatures are shown only where reported.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Density | 7.9 g/cm³ | TYPICAL | 7.90 g/cm3 | Carpenter Technology Corporation | VERIFIED | |
| Elastic Modulus | 193 GPa | TYPICAL | 193 GPa | Carpenter Technology Corporation | VERIFIED | |
| Poisson's Ratio | 0.29 dimensionless | TYPICAL | 0.29 dimensionless | Carpenter Technology Corporation | VERIFIED |
Thermal & Thermodynamic Properties
Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Coefficient of Thermal Expansion | 17.2 µm/(m·K) | TYPICAL | Test Temp: 100 °C | 17.2 10^-6/K | Carpenter Technology Corporation | VERIFIED |
| Thermal Conductivity | 16.2 W/(m·K) | TYPICAL | Test Temp: 100 °C | 16.2 W/(m·K) | Carpenter Technology Corporation | VERIFIED |
Contextual Mechanical Properties & Tempers
Engineering strength, ductility, and hardness values grouped by product form, temper, and section thickness. Mechanical properties are contextual and not isotropic averages.
| Product Form | Temper / Condition | Section Size | Tensile (UTS) | Yield Strength | Elongation | Shear Strength | Fatigue Strength | Hardness (Scales Preserved) | Status |
|---|---|---|---|---|---|---|---|---|---|
| Bar | Cold Finished Annealed Bar · Annealed · Cold FinishedSource values and qualifiersUltimate Tensile Strength: ≥ 515 MPa (MINIMUM)ASTM A582Carpenter Technology Corporation — CarTech Project 70+ 303 Datasheet, Mechanical Properties Table Reduction of Area: ≥ 50 % (MINIMUM)ASTM A582Carpenter Technology Corporation — CarTech Project 70+ 303 Datasheet, Mechanical Properties Table | — | ≥ 515 MPa | — | — | — | — | — | VERIFIED |
| Bar | Cold Finished Annealed Bar · Annealed · Cold FinishedSource values and qualifiersYield Strength: ≥ 205 MPa (MINIMUM)ASTM A582 (0.2% offset)Carpenter Technology Corporation — CarTech Project 70+ 303 Datasheet, Mechanical Properties Table | — | — | ≥ 205 MPa | — | — | — | — | VERIFIED |
| Bar | Cold Finished Annealed Bar · Annealed · Cold FinishedSource values and qualifiersElongation at Break: ≥ 35 % (MINIMUM)ASTM A582Carpenter Technology Corporation — CarTech Project 70+ 303 Datasheet, Mechanical Properties Table | — · in 50 mm (2 in) | — | — | ≥ 35 % | — | — | — | VERIFIED |
| Bar | Cold Finished Annealed BarSource values and qualifiersHRB Hardness: ≤ 95 HRB (MAXIMUM)Carpenter Technology Corporation — CarTech Project 70+ 303 Datasheet, Mechanical Properties Table | — | — | — | — | — | — | ≤ 95 HRB | VERIFIED |
Sources & Provenance Trail
Reference publications and standards organization registers cited across this material record.
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Reviewed factual transcription from primary producer engineering datasheet.
Reviewed factual transcription from primary producer engineering datasheet.
Reviewed factual transcription from primary producer engineering datasheet.
Reviewed factual transcription from primary producer engineering datasheet.