17-4 PH (630) Stainless Steel
Primary Designation:COMMERCIAL 17-4 PH
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.
Data Completeness & Record Integrity:9 composition elements and 41 contextual property values cataloged.
Omitted fields represent unverified parameters. "Missing is better than invented."
Key Engineering Properties
Representative source rows, qualified by their reported conditions. Inspect the tables below for all values, limits, and source notes.
Density
7.78 g/cm³TYPICAL · Condition A · temperature not stated
Thermal Conductivity
17.9 W/(m·K)TYPICAL · H900 · at 149 °C
Composition Excerpt
C ≤ 0.07 wt%Carbon (max)
Standard Elemental Basis: MAXEngineering Summary
17-4 PH (630) 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.
Direct Standard DesignationsDIRECT DESIGNATION
2 Primary Identifiers| System | Identifier | Standard System Name | Classification Notes & Provenance |
|---|---|---|---|
| TYPE | 630 | Producer-referenced stainless type | —Ref: ARMCO 17-4 PH Stainless Steel Product Data Bulletin |
| UNS | S17400 | Unified Numbering System | —Ref: ARMCO 17-4 PH Stainless Steel Product Data Bulletin |
Recognized Commercial Aliases & Trade NamesCOMMON ALIAS
1 Listed| Recognized Name / Alias | Classification | Technical Usage & Context |
|---|---|---|
| 17-4 PH | Common material name | Recognized commercial trade designation |
Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE
2 Applicable Standards| Standards Body | Specification Code | Specification Title / Scope | Relationship Type |
|---|---|---|---|
| ASTM | A564 | Standard technical specification.Producer lists Type 630 bars and shapes; edition not stated. This is a product specification, not an equivalent identity. · PRODUCT_SPECIFICATION · Product form: Bar | Specification Reference |
| 17-4 | 17-4 PH (630) Stainless Steel Engineering Datasheet | Applicable specification reference. | Specification Reference |
Engineering Notice: Applicable specifications establish manufacturing requirements, dimensional tolerances, and test criteria for specific product forms (e.g. bus bar, wire, plate, pipe). They represent applicable technical standards, not alternative or equivalent alloy grades.
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 | ≤ 0.07 | wt% | Source cell: .07max. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Manganese | Mn | 25 | MAXIMUM | ≤ 1.00 | wt% | Source cell: 1.00max. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Phosphorus | P | 15 | MAXIMUM | ≤ 0.04 | wt% | Source cell: .04max. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Sulfur | S | 16 | MAXIMUM | ≤ 0.03 | wt% | Source cell: .03max. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Silicon | Si | 14 | MAXIMUM | ≤ 1.00 | wt% | Source cell: 1.00max. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Chromium | Cr | 24 | RANGE | 15.00 – 17.50 | wt% | Source cell: 15.00/17.50. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Nickel | Ni | 28 | RANGE | 3.00 – 5.00 | wt% | Source cell: 3.00/5.00. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Copper | Cu | 29 | RANGE | 3.00 – 5.00 | wt% | Source cell: 3.00/5.00. Scope: printed p1, composition wt%.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
| Niobium | Nb + Ta | 41 | RANGE | 0.15 – 0.45 | wt% | Combined Nb + Ta limit; producer makes no intentional Ta addition. No individual split inferred.Ref: Cleveland-Cliffs AK Steel International | VERIFIED |
* Elemental percentages are expressed in weight percent (wt%). Values represent applicable specification limits. Unspecified trace elements are not fabricated or assumed.Preserves exact semantic basis
Property Display UnitsSwitch between Canonical SI and Source / US Customary units:
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 |
|---|---|---|---|---|---|---|
| DensityCondition: Condition A | 7.78 g/cm³ | TYPICAL | Source temperature not specified. Metric density retained independently; rounded imperial equivalents are not used. | 7.78 g/cm³ | Cleveland-Cliffs AK Steel International | VERIFIED |
| DensityCondition: H900 | 7.8 g/cm³ | TYPICAL | Source temperature not specified. Metric density retained independently; rounded imperial equivalents are not used. | 7.8 g/cm³ | Cleveland-Cliffs AK Steel International | VERIFIED |
| DensityCondition: H1075 | 7.81 g/cm³ | TYPICAL | Source temperature not specified. Metric density retained independently; rounded imperial equivalents are not used. | 7.81 g/cm³ | Cleveland-Cliffs AK Steel International | VERIFIED |
| DensityCondition: H1150 | 7.82 g/cm³ | TYPICAL | Source temperature not specified. Metric density retained independently; rounded imperial equivalents are not used. | 7.82 g/cm³ | Cleveland-Cliffs AK Steel International | VERIFIED |
| Density | 7.75 g/cm³ | TYPICAL | 7.75 g/cm3 | Carpenter Technology Corporation | VERIFIED | |
| Elastic Modulus | 196 GPa | TYPICAL | 196 GPa | Carpenter Technology Corporation | VERIFIED | |
| Poisson's Ratio | 0.27 dimensionless | TYPICAL | 0.27 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 |
|---|---|---|---|---|---|---|
| Thermal ConductivityCondition: H900 | 17.9 W/(m·K) | TYPICAL | Test Temp: 149 °C | 17.9 W/(m·K) | Cleveland-Cliffs AK Steel International | VERIFIED |
| Thermal ConductivityCondition: H900 | 19.5 W/(m·K) | TYPICAL | Test Temp: 260 °C | 19.5 W/(m·K) | Cleveland-Cliffs AK Steel International | VERIFIED |
| Thermal ConductivityCondition: H900 | 22.5 W/(m·K) | TYPICAL | Test Temp: 460 °C | 22.5 W/(m·K) | Cleveland-Cliffs AK Steel International | VERIFIED |
| Thermal ConductivityCondition: H900 | 22.6 W/(m·K) | TYPICAL | Test Temp: 482 °C | 22.6 W/(m·K) | Cleveland-Cliffs AK Steel International | VERIFIED |
| Coefficient of Thermal Expansion | 10.8 µm/(m·K) | TYPICAL | Test Temp: 100 °C | 10.8 10^-6/K | Carpenter Technology Corporation | VERIFIED |
| Thermal Conductivity | 18.4 W/(m·K) | TYPICAL | Test Temp: 100 °C | 18.4 W/(m·K) | Carpenter Technology Corporation | VERIFIED |
Electrical Properties
Electrical conductivity and resistivity in their reported units and conditions.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Electrical ResistivityCondition: Condition A | 1000 nΩ·m | TYPICAL | Test temperature not stated. | 100 µΩ·cm | Cleveland-Cliffs AK Steel International | VERIFIED |
| Electrical ResistivityCondition: H900 | 800 nΩ·m | TYPICAL | Test temperature not stated. | 80 µΩ·cm | Cleveland-Cliffs AK Steel International | VERIFIED |
| Electrical ResistivityCondition: H1075 | 800 nΩ·m | TYPICAL | Test temperature not stated. | 80 µΩ·cm | Cleveland-Cliffs AK Steel International | 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.
Showing 5 of 5 conditions
| Product Form | Temper / Condition | Section Size | Tensile (UTS) | Yield Strength | Elongation | Shear Strength | Fatigue Strength | Hardness (Scales Preserved) | Status |
|---|---|---|---|---|---|---|---|---|---|
| Bar | H900 · LONGITUDINAL · H900Source values and qualifiersTensile Strength: 1379 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H900 Yield Strength: 1275.5 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H900 Elongation: 14 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements. Gauge length 4D0.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H900 Reduction Of Area: 50 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H900 HB Hardness: 420 HB (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H900 HRC Hardness: 44 HRC (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H900 | — | 1379 MPa | 1275.5 MPa | 14 % | — | — | 420 HB44 HRC | VERIFIED |
| Bar | H1025 · LONGITUDINAL · H1025Source values and qualifiersTensile Strength: 1172.1 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1025 Yield Strength: 1137.6 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1025 Elongation: 15 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements. Gauge length 4D0.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1025 Reduction Of Area: 56 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1025 HB Hardness: 352 HB (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1025 HRC Hardness: 38 HRC (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1025 | — | 1172.1 MPa | 1137.6 MPa | 15 % | — | — | 352 HB38 HRC | VERIFIED |
| Bar | H1075 · LONGITUDINAL · H1075Source values and qualifiersTensile Strength: 1137.6 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1075 Yield Strength: 1034.2 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1075 Elongation: 16 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements. Gauge length 4D0.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1075 Reduction Of Area: 58 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1075 HB Hardness: 341 HB (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1075 HRC Hardness: 36 HRC (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1075 | — | 1137.6 MPa | 1034.2 MPa | 16 % | — | — | 341 HB36 HRC | VERIFIED |
| Bar | H1150 · LONGITUDINAL · H1150Source values and qualifiersTensile Strength: 999.7 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1150 Yield Strength: 861.8 MPa (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1150 Elongation: 19 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements. Gauge length 4D0.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1150 Reduction Of Area: 60 % (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1150 HB Hardness: 311 HB (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1150 HRC Hardness: 33 HRC (TYPICAL)Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements.Cleveland-Cliffs AK Steel International — printed p3, Table 2, H1150 | — | 999.7 MPa | 861.8 MPa | 19 % | — | — | 311 HB33 HRC | VERIFIED |
| Round, hexagonal and square bar | Condition A · Solution treatedSource values and qualifiersHRC Hardness: ≤ 38 HRC (MAXIMUM)Maximum hardness in Condition A; do not extrapolate across section sizes.Cleveland-Cliffs AK Steel International — printed p4, Table 4 | — · 3 < t ≤ 12 mm | — | — | — | — | — | ≤ 38 HRC | VERIFIED |
Hardness Integrity Notice: Rockwell B (HRB), Rockwell F (HRF), and Superficial 30T (HR30T) scales are reported on their measured scales without cross-scale mathematical conversion.
Source: See fact-level citations
Sources & Provenance Trail
Reference publications and standards organization registers cited across this material record.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Carpenter Technology CorporationCarpenter Specialty Alloys Technical Datasheets (Project 70+ 303, CarTech 52100, Custom 630 / 17-4 PH)
PRIMARY PRODUCER
Reviewed factual transcription from primary producer engineering datasheet.
Issuing Body: Carpenter Technology CorporationRevision: Carpenter Specialty Alloys Technical Bulletin 2024View Source Record ↗
Carpenter Technology CorporationCarpenter Specialty Alloys Technical Datasheets (Project 70+ 303, CarTech 52100, Custom 630 / 17-4 PH)
PRIMARY PRODUCER
Reviewed factual transcription from primary producer engineering datasheet.
Issuing Body: Carpenter Technology CorporationRevision: Carpenter Specialty Alloys Technical Bulletin 2024View Source Record ↗
Carpenter Technology CorporationCarpenter Specialty Alloys Technical Datasheets (Project 70+ 303, CarTech 52100, Custom 630 / 17-4 PH)
PRIMARY PRODUCER
Reviewed factual transcription from primary producer engineering datasheet.
Issuing Body: Carpenter Technology CorporationRevision: Carpenter Specialty Alloys Technical Bulletin 2024View Source Record ↗
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Cleveland-Cliffs AK Steel InternationalARMCO 17-4 PH Stainless Steel Product Data Bulletin
PRIMARY PRODUCER
Reviewed factual transcription; source document SHA-256 is recorded in the capture metadata. No cross-standard equivalence is asserted.
Intellectual Property & Provenance Notice: Mat Grades cites technical literature from recognized industry associations and standards organizations. Underlying technical standards and publication data remain the intellectual property of their respective issuing organizations.