High Strength SS · Martensitic
Stainless Steel 420C
Stainless Steel 420C is a high strength stainless steel — high-carbon cutlery stainless. Typical values: 450 MPa yield, 7.7 g/cm³, rated to 650 °C. Available for CNC machining at FabDigit.
Properties
Typical room-temperature values for the default supply condition. Metric first, imperial in gray. The bars show where 420C sits against the other 87 stainless steel grades in the catalog.
Datasheet
| Yield strength | 450 MPa65 ksi |
|---|---|
| Tensile strength | 760 MPa110 ksi |
| Hardness | 56 HRC≈ 579 HB |
| Density | 7.7 g/cm³0.278 lb/in³ |
| Specific strength (yield ÷ density) | 58 |
| Min service temp | -40 °C-40 °F |
| Max service temp | 650 °C1,202 °F |
| Electrical conductivity | 3.1 % IACS1.8 MS/m |
| Machinability | Fair40 / 100 |
| Weldability | Poor20 / 100 |
| Formability | Fair35 / 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. 420C is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to 420C. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair40 / 100 |
|---|---|
| ISO material group | M.4 |
| Cutting speed (rough / finish) | 135 / 165 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 |
Surface finishes for 420C
Coatings and treatments compatible with stainless steel on the processes 420C 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
- 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 420C in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.4034X46Cr13
- GB (China)
- 4Cr13
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.