Stainless Steel 154CM Subcritical Anneal
Heat-treated state
AISI/SAE 154CM
Use to re-soften cold-worked or forged stock without full spheroidizing cycle.
Values for the Subcritical Anneal condition
Other 154CM tempers and conditions
154CM is listed in 6 conditions; see the grade overview at 154CM.
- Annealed
- Subcritical Anneal
- Q&T 55-57 HRC
- Q&T 58-60 HRC
- Cryo 59-61 HRC
- Q&T 60-62 HRC
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault mill-annealed (spheroidized) bar, plate and sheet | Standard as-supplied stock condition for blanking, machining and grinding before hardening. | 450 | 760 | 13 | 235 HB | — |
Subcritical AnnealThis page 730–760 °C, softening after machining or forging | Use to re-soften cold-worked or forged stock without full spheroidizing cycle. | 500 | 820 | 11 | 25 HRC | 2.9 % IACS |
Hardened & tempered to 55–57 HRC | Choose for choppers, tools and parts where impact toughness matters more than peak edge life. | 1,700 | 1,900 | 2 | 56 HRC | — |
Hardened & tempered to 58–60 HRC | The mainstream heat treat for production folders and fixed blades — best balance of edge holding, toughness and stain resistance. | 1,850 | 2,050 | 1.5 | 59 HRC | — |
Austenitize + deep cryogenic (−196 °C) + double temper, 59–61 HRC | Best-practice knife heat treat: near-zero retained austenite for dimensional stability, slightly higher hardness and improved corrosion behaviour. | 1,900 | 2,150 | 1.2 | 60 HRC | — |
Hardened & tempered to 60–62 HRC | Pick for slicing-focused blades and wear parts where maximum hardness outweighs chipping risk. | 1,950 | 2,200 | 1 | 61 HRC | — |
What is 154CM Subcritical Anneal?
154CM Subcritical Anneal is 154CM heat treated to Subcritical Anneal — use to re-soften cold-worked or forged stock without full spheroidizing cycle. 154CM Subcritical Anneal has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 820 MPa (119 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 11% and the elastic modulus is 204 GPa (29.6 Msi). 154CM Subcritical Anneal has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,400°C (2,552 °F). Annealed is the default condition FabDigit quotes; Subcritical Anneal is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 82/100, better than 95% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Conducts heat well — 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades
- High strength — 500 MPa (72.5 ksi), better than 77% of stainless steel grades
Limitations
- Difficult to weld — 15/100, worse than 98% of stainless steel grades
- Limited ductility — 11%, worse than 96% of stainless steel grades
- Limited formability — 18/100, worse than 89% of stainless steel grades
- Needs corrosion protection — 47/100, worse than 81% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
154CM Subcritical Anneal properties
Typical room-temperature values for 154CM Subcritical Anneal; 23 are specific to this condition. Other listed values are 154CM reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
154CM Subcritical Anneal has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical13
154CM Subcritical Anneal has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 820 MPa (119 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 11% and the elastic modulus is 204 GPa (29.6 Msi).
Thermal6
154CM Subcritical Anneal is rated for continuous service to 400°C (752 °F). It conducts heat at 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades. Thermal expansion is 10.2 µm/m·K (5.67 µin/in·°F).
Electrical3
154CM Subcritical Anneal conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (47/100), worse than 81% of stainless steel grades.
Sustainability4
Producing a kilogram of 154CM Subcritical Anneal takes about 55 MJ of energy and emits 4.2 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 40%.
Manufacturability8
154CM Subcritical Anneal's machinability is poor (29/100, worse than 76% of stainless steel grades); weldability poor (15/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 154CM Subcritical Anneal
Is 154CM easy to machine?
Machine only in the annealed state with rigid setups, sharp carbide or coated carbide at low-to-moderate speed and generous feed; after hardening, finish by grinding/EDM only.
Can 154CM be welded?
Essentially non-weldable in service parts — high carbon promotes martensite cracking; if unavoidable, preheat 250–300 °C, use matching or 309-type filler and temper immediately.
Can 154CM be formed, bent or molded?
Hot forge 1050–1150 °C with slow cooling and immediate anneal; cold forming limited to gentle bends in thin annealed sheet.
What surface finishes work on 154CM?
Hand or belt polish easily to mirror when hardened; passivate in nitric or citric acid after grinding, and PVD/DLC or bead-blast finishes work well below the tempering temperature.
154CM 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 |
|---|---|---|
| C | 0.95 – 1.2 | 1.05 |
| Cr | 13.5 – 14.5 | 14 |
| Mokey difference vs 440C | 3.75 – 4.25 | 4 |
| Mn | ≤ 0.6 | 0.5 |
| Si | ≤ 0.5 | 0.3 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Fe | balance | — |
154CM Subcritical Anneal — frequently asked
What is 154CM Subcritical Anneal used for?
154CM Subcritical Anneal is typically used for premium knife blades, high-performance kitchen cutlery, folding pocket knife blades, hunting and outdoor fixed blades, wear-resistant cutting edges and custom blade blanks for grinding. In short: US 440C-class blade steel; hardens to 62 HRC; edge retention over toughness.
What is the yield strength of 154CM Subcritical Anneal?
154CM Subcritical Anneal has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 820 MPa (119 ksi) — stronger than 77% of stainless steel grades. Strength varies by condition: see the 6 listed tempers.
Is 154CM Subcritical Anneal easy to machine?
Not especially — machinability is rated poor (29/100, worse than 76% of stainless steel grades). Machine only in the annealed state with rigid setups, sharp carbide or coated carbide at low-to-moderate speed and generous feed; after hardening, finish by grinding/EDM only.
Can 154CM Subcritical Anneal be welded?
Not readily — weldability is rated poor (15/100). Essentially non-weldable in service parts — high carbon promotes martensite cracking; if unavoidable, preheat 250–300 °C, use matching or 309-type filler and temper immediately.
What surface finishes work on 154CM Subcritical Anneal?
Hand or belt polish easily to mirror when hardened; passivate in nitric or citric acid after grinding, and PVD/DLC or bead-blast finishes work well below the tempering temperature.
Can 154CM Subcritical Anneal be formed, bent or molded?
Hot forge 1050–1150 °C with slow cooling and immediate anneal; cold forming limited to gentle bends in thin annealed sheet.
What is the maximum service temperature of 154CM Subcritical Anneal?
154CM Subcritical Anneal is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- 154CM / CPM 154 martensitic stainless data sheet — Crucible Industries (2020)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys (440C, high-C martensitic SS) — ASM International (1990)
- ASTM A276 / A756 — Stainless steel bars and shapes — ASTM International (2017)
- ASM Handbook Vol.13B: Corrosion — Materials — ASM International (2005)
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.