Steel 1.2510 Stress Relieved
Heat-treated state
EN 1.2510
Intermediate step for large or asymmetric tools to minimize distortion during subsequent hardening.
Values for the Stress Relieved condition
Other 1.2510 tempers and conditions
1.2510 is listed in 8 conditions; see the grade overview at 1.2510.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress RelievedThis page 600–650 °C after rough machining | Intermediate step for large or asymmetric tools to minimize distortion during subsequent hardening. | 440 | 740 | 16 | 16 HRC | 7 % IACS |
AnnealedDefault soft (spheroidized) annealed, ≤229 HB | Standard as-delivered condition for bar, plate and flat stock; machine to shape then harden. | 450 | 750 | 15 | 16 HRC | 7 % IACS |
as-rolled / black bar, unmachined | Cheapest raw form; usually still soft annealed after rolling, requires machining allowance for scale and decarburized skin. | 470 | 780 | 12 | 18 HRC | 7 % IACS |
annealed then cold drawn/peeled bar | Choose for small-diameter bar needing close tolerance and clean surface without further turning. | 620 | 850 | 8 | 24 HRC | 7 % IACS |
Oil quenched from ~800 °C, tempered ~250 °C | Tougher setting for shear blades and impact-loaded punches where chipping is the main risk. | 1,700 | 2,000 | 2 | 57 HRC | — |
Oil quenched, tempered ~200 °C | Most common working hardness for blanking dies, gauges and woodworking tools — best wear/toughness balance. | 1,850 | 2,150 | 1.5 | 59 HRC | — |
Oil quenched, tempered 150–180 °C | For maximum wear resistance and edge holding in thin-stock blanking, knives and reamers, accepting lower toughness. | 2,000 | 2,300 | 1 | 61 HRC | — |
Oil quenched, low temper ~120–150 °C | Peak hardness for gauges, knife edges and light-duty cutting tools; brittle, avoid impact or heavy sections. | — | 2,400 | 0.5 | 63 HRC | — |
What is 1.2510 Stress Relieved?
1.2510 Stress Relieved is 1.2510 heat treated to Stress Relieved — intermediate step for large or asymmetric tools to minimize distortion during subsequent hardening. 1.2510 Stress Relieved has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 50% of steel grades. Elongation at break is 16% and the elastic modulus is 210 GPa (30.5 Msi). 1.2510 Stress Relieved has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,350°C (2,462 °F). Annealed is the default condition FabDigit quotes; Stress Relieved is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 78/100, better than 95% of steel grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Difficult to weld — 15/100, worse than 91% of steel grades
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades
- Low fracture toughness — 62 MPa·√m (56.4 ksi·√in), worse than 76% of steel grades
1.2510 Stress Relieved properties
Typical room-temperature values for 1.2510 Stress Relieved; 23 are specific to this condition. Other listed values are 1.2510 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
1.2510 Stress Relieved has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,350°C (2,462 °F).
Mechanical17
1.2510 Stress Relieved has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 50% of steel grades. Elongation at break is 16% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
1.2510 Stress Relieved is rated for continuous service to 200°C (392 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
1.2510 Stress Relieved conducts electricity at 7 % IACS, worse than 74% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 1.2510 Stress Relieved takes about 34 MJ of energy and emits 2.6 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 35%.
Manufacturability8
1.2510 Stress Relieved's machinability is fair (44/100, worse than 71% of steel grades); weldability poor (15/100); formability poor (32/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.2510 Stress Relieved
Is 1.2510 easy to machine?
Machine in the soft-annealed condition (~210 HB) with HSS or coated carbide; after hardening above 58 HRC only grinding, EDM or CBN cutting is practical.
Can 1.2510 be welded?
Poor weldability — repair welds only, with 300–400 °C preheat, matching low-alloy filler and immediate temper at the part's tempering temperature to avoid quench cracks.
Can 1.2510 be formed, bent or molded?
Cold forming limited to gentle bending of annealed thin stock; hot work at 850–1050 °C, then slow cool and soft anneal at 750–800 °C before machining.
What surface finishes work on 1.2510?
Takes a fine mirror polish when hardened; protect with oil, black oxide, phosphate or PVD coating since the alloy has no intrinsic corrosion resistance.
1.2510 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 | 0.9 – 1.05 | 0.95 |
| Si | 0.1 – 0.4 | 0.25 |
| Mn | 1 – 1.2 | 1.1 |
| Cr | 0.5 – 0.7 | 0.6 |
| W | 0.5 – 0.7 | 0.6 |
| Voptional in some standards | 0.05 – 0.15 | 0.1 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Fe | balance | — |
1.2510 Stress Relieved — frequently asked
What is 1.2510 Stress Relieved used for?
1.2510 Stress Relieved is typically used for blanking and piercing dies, shear blades, gauges and measuring tools, taps and reamers, woodworking knives and punches and form tools. In short: workhorse oil-hardening tool.
What is the yield strength of 1.2510 Stress Relieved?
1.2510 Stress Relieved has a typical yield strength of 440 MPa (63.8 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 50% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is 1.2510 Stress Relieved easy to machine?
Not especially — machinability is rated fair (44/100, worse than 71% of steel grades). Machine in the soft-annealed condition (~210 HB) with HSS or coated carbide; after hardening above 58 HRC only grinding, EDM or CBN cutting is practical.
Can 1.2510 Stress Relieved be welded?
Not readily — weldability is rated poor (15/100). Poor weldability — repair welds only, with 300–400 °C preheat, matching low-alloy filler and immediate temper at the part's tempering temperature to avoid quench cracks.
What surface finishes work on 1.2510 Stress Relieved?
Takes a fine mirror polish when hardened; protect with oil, black oxide, phosphate or PVD coating since the alloy has no intrinsic corrosion resistance.
Can 1.2510 Stress Relieved be formed, bent or molded?
Cold forming limited to gentle bending of annealed thin stock; hot work at 850–1050 °C, then slow cool and soft anneal at 750–800 °C before machining.
What is the maximum service temperature of 1.2510 Stress Relieved?
1.2510 Stress Relieved is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1.2510 Stress Relieved?
Yes — 1.2510 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
- EN ISO 4957 Tool steels (100MnCrW4, 1.2510) — ISO/CEN (2018)
- ASTM A681 Standard Specification for Tool Steels Alloy (O1) — ASTM (2015)
- GB/T 1299 (9CrWMn) — SAC (2014)
- Uddeholm Arne (O1 / 1.2510) datasheet — Uddeholm / voestalpine (2021)
- BÖHLER K460 cold work tool steel datasheet — voestalpine Böhler Edelstahl (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.16 — Machining — ASM International (1989)
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.