Steel CPM S30V Stress Relieved
Heat-treated state
Intermediate step for thin or asymmetric parts to reduce distortion during hardening.
Values for the Stress Relieved condition
Other CPM S30V tempers and conditions
CPM S30V is listed in 5 conditions; see the grade overview at CPM S30V.
- Annealed
- Stress Relieved
- H&T 57-58 HRC
- Q&T
- H&T + Cryo 60-61 HRC
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault soft, as-supplied bar/plate for machining | Stock condition for blanking, milling and drilling before hardening. | 700 | 950 | 8 | 23 HRC | — |
Stress RelievedThis page machined blanks stabilized before hardening (~650 °C) | Intermediate step for thin or asymmetric parts to reduce distortion during hardening. | 725 | 970 | 7 | 24 HRC | 2.6 % IACS |
High (secondary hardening) temper ~540 °C | Use when tempering above 250 °C is needed for dimensional stability or nitriding/coating cycles; accept lower corrosion resistance. | 1,750 | 1,950 | 1 | 58 HRC | 2.6 % IACS |
Quenched and tempered | General hardened service condition for blades and wear parts. | 1,800 | 2,050 | 1 | 60 HRC | — |
H&T + Cryogenic treatment | Choose when maximum attainable hardness and edge retention are required and retained austenite must be minimized. | 1,950 | 2,200 | 0.5 | 61 HRC | 2.5 % IACS |
What is CPM S30V Stress Relieved?
CPM S30V Stress Relieved is CPM S30V heat treated to Stress Relieved — intermediate step for thin or asymmetric parts to reduce distortion during hardening. CPM S30V Stress Relieved has a yield strength of 725 MPa (105 ksi) and a tensile strength of 970 MPa (141 ksi) — stronger than 82% of steel grades. Elongation at break is 7% and the elastic modulus is 221 GPa (32.1 Msi). CPM S30V Stress Relieved has a density of 7.44 g/cm³ (0.269 lb/in³), lighter than 98% of steel grades. It melts at 1,400°C (2,552 °F). Annealed is the default condition FabDigit quotes; Stress Relieved is available on request or by drawing note.
Advantages
- Good corrosion resistance — 58/100, better than 99% of steel grades
- Polishes to a fine finish — 70/100, better than 87% of steel grades
- High strength — 725 MPa (105 ksi), better than 82% of steel grades
Limitations
- Difficult to weld — 10/100, worse than 99% of steel grades
- Low fracture toughness — 24 MPa·√m (21.8 ksi·√in), worse than 98% of steel grades
- Difficult to machine — 19/100, worse than 97% of steel grades
- Limited formability — 9/100, worse than 97% of steel grades
- High embodied carbon — 5.5 kg CO₂/kg, worse than 97% of steel grades
CPM S30V Stress Relieved properties
Typical room-temperature values for CPM S30V Stress Relieved; 23 are specific to this condition. Other listed values are CPM S30V reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
CPM S30V Stress Relieved has a density of 7.44 g/cm³ (0.269 lb/in³), lighter than 98% of steel grades. It melts at 1,400°C (2,552 °F).
Mechanical12
CPM S30V Stress Relieved has a yield strength of 725 MPa (105 ksi) and a tensile strength of 970 MPa (141 ksi) — stronger than 82% of steel grades. Elongation at break is 7% and the elastic modulus is 221 GPa (32.1 Msi).
Thermal5
CPM S30V Stress Relieved is rated for continuous service to 250°C (482 °F). It conducts heat at 20 W/m·K (11.6 BTU/hr·ft·°F), worse than 96% of steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical2
CPM S30V Stress Relieved has an electrical resistivity of 6.5×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is good (58/100), better than 99% of steel grades.
Sustainability4
Producing a kilogram of CPM S30V Stress Relieved takes about 70 MJ of energy and emits 5.5 kg of CO₂ — more than 97% of steel grades. Typical recycled content is 25%.
Manufacturability6
CPM S30V Stress Relieved's machinability is poor (19/100, worse than 97% of steel grades); weldability not recommended (10/100); formability not recommended (9/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CPM S30V Stress Relieved
Is CPM S30V easy to machine?
Machine only in the annealed state with rigid setups, low speeds and carbide or ceramic tooling; hardened parts require CBN/diamond grinding or EDM, and abundant coolant to avoid burn.
Can CPM S30V be welded?
Not recommended for structural joints; if unavoidable, preheat 200–260 °C, use matched or 410-type filler and temper immediately, expect cracking risk.
Can CPM S30V be formed, bent or molded?
Essentially non-formable cold; produce shapes by machining, waterjet or grinding of annealed stock, then harden.
What surface finishes work on CPM S30V?
Passivate after hardening, hand-finish or belt-grind to remove decarburized skin; takes a satin-to-mirror finish and accepts DLC/PVD or black-oxide coatings.
CPM S30V chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CCrucible nominal | 1.4 – 1.5 | 1.45 |
| Cr | 13.5 – 14.5 | 14 |
| Vforms fine MC carbides for wear resistance | 3.8 – 4.2 | 4 |
| Mo | 1.8 – 2.2 | 2 |
| Mnresidual | ≤ 0.6 | 0.4 |
| Siresidual | ≤ 0.6 | 0.4 |
| Presidual | ≤ 0.03 | — |
| Sresidual | ≤ 0.03 | — |
| Fe | balance | — |
CPM S30V Stress Relieved — frequently asked
What is CPM S30V Stress Relieved used for?
CPM S30V Stress Relieved is typically used for kitchen knife blades, tactical and folding knife blades, hunting and outdoor blades, industrial slitting and trimming knives, food-processing cutting blades and corrosion-exposed wear inserts. In short: premium powder-metal blade.
What is the yield strength of CPM S30V Stress Relieved?
CPM S30V Stress Relieved has a typical yield strength of 725 MPa (105 ksi) and a tensile strength of 970 MPa (141 ksi) — stronger than 82% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is CPM S30V Stress Relieved easy to machine?
Not especially — machinability is rated poor (19/100, worse than 97% of steel grades). Machine only in the annealed state with rigid setups, low speeds and carbide or ceramic tooling; hardened parts require CBN/diamond grinding or EDM, and abundant coolant to avoid burn.
Can CPM S30V Stress Relieved be welded?
Not readily — weldability is rated not recommended (10/100). Not recommended for structural joints; if unavoidable, preheat 200–260 °C, use matched or 410-type filler and temper immediately, expect cracking risk.
What surface finishes work on CPM S30V Stress Relieved?
Passivate after hardening, hand-finish or belt-grind to remove decarburized skin; takes a satin-to-mirror finish and accepts DLC/PVD or black-oxide coatings.
Can CPM S30V Stress Relieved be formed, bent or molded?
Essentially non-formable cold; produce shapes by machining, waterjet or grinding of annealed stock, then harden.
What is the maximum service temperature of CPM S30V Stress Relieved?
CPM S30V Stress Relieved is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in CPM S30V Stress Relieved?
Yes — CPM S30V Stress Relieved is available for CNC machining; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- CPM S30V Data Sheet — Crucible Industries (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Tool Steels, 5th ed. — ASM International (1998)
- Knife-steel composition and toughness/hardness comparison data — Knife Steel Nerds (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.