High Strength SS · PH Stainless
Stainless Steel PH 13-8 Mo
Stainless Steel PH 13-8 Mo is a high strength stainless steel — aerospace high-strength ph. Typical values: 1,380 MPa yield, 7.76 g/cm³, rated to 480 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the Condition A (solution annealed) condition. Metric first, imperial in gray. The bars show where PH 13-8 Mo sits against the other 87 stainless steel grades in the catalog.
Datasheet
| Yield strength | 1,380 MPa200 ksi |
|---|---|
| Tensile strength | 1,410 MPa205 ksi |
| Hardness | 45 HRC≈ 421 HB |
| Density | 7.76 g/cm³0.28 lb/in³ |
| Specific strength (yield ÷ density) | 178 |
| Min service temp | -50 °C-58 °F |
| Max service temp | 480 °C896 °F |
| Electrical conductivity | 2.1 % IACS1.2 MS/m |
| Machinability | Fair40 / 100 |
| Weldability | Very good75 / 100 |
| Formability | Fair40 / 100 |
| ISO 513 machining group | M |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other stainless steel grades
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. PH 13-8 Mo is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to PH 13-8 Mo. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair40 / 100 |
|---|---|
| ISO material group | M.3 |
| Cutting speed (rough / finish) | 120 / 140 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1.5 mm |
| Drill depth limit | 4× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair40 / 100 |
|---|---|
| Weldability | Better75 / 100 |
Conditions and tempers
How PH 13-8 Mo is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Condition ADefault Solution annealed (Condition A) | Machine soft now, harden after — complex parts needing max final hardness | — | — | — | — |
H950 Aged at 950 °F (H950) | High hardness, tougher than H900 — loaded wear parts | — | — | — | — |
H1000 Aged at 1000 °F (H1000) | Strong with real shock tolerance — pump shafts, fittings | — | — | — | — |
H1025 Aged at 1025 °F (H1025) | The default 17-4 pick — strong, tough, machinable | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on PH 13-8 Mo, ranked by how often they make sense for this grade.
Heat treatment
| Solution Anneal | Dissolve carbides; reset austenite (stainless) |
|---|---|
| Stress Relief | Reduce residual stress without changing structure |
| Quench & Temper | Achieve target hardness with controlled toughness28–55 HRC |
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Passivate (Citric) | Passivation |
| Edge Break (0.5mm) | Deburr |
| Passivate (Nitric / AMS 2700) | Passivation |
| Electropolish | Polish |
| Glass Bead Blast | Blast |
| Laser Mark | Marking |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for PH 13-8 Mo
Coatings and treatments compatible with stainless steel on the processes PH 13-8 Mo runs on. Pick them in the quote configurator or call them out on the drawing.
Passivation
- Electropolishing
- Passivation (Stainless Steel)
- Pickling
Plating
- Chrome Plating
- Electroless Nickel (EN)
- Gold Plating
- Hard Chrome Plating
- Nickel Plating
- Silver Plating
PVD Coating
- AlCrN
- AlTiN
- CrN
- DLC
- MoS2
- TiAlN
- TiB2
- TiCN
- TiN
- WC/C
- ZrN
Organic Coating
- Cerakote
- Epoxy Coating
- Painting
- Powder Coating
- PTFE Coating
CVD Coating
- CVD Al2O3
- CVD TiCN
- CVD TiN
- Multilayer CVD
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Black / Phosphate
- Black Oxide
Thermal Spray
- HVOF Coating
- Plasma Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel PH 13-8 Mo in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S13800
- Other
- 13-8 PH
Stock forms
Raw-material forms FabDigit sources PH 13-8 Mo in.
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.