Stainless Steel 1.4845 1/2H
Supply condition
EN 1.4845 · UNS S31008 · AISI/SAE 310S · JIS SUS310S · GB 06Cr25Ni20
1/2H = half hard
Heavier cold work for flat springs and high-strength wire; ductility and formability are much reduced.
Values for the 1/2H condition
Other 1.4845 tempers and conditions
1.4845 is listed in 4 conditions; see the grade overview at 1.4845.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault solution annealed 1030–1180 °C, rapid cooled | Standard stocked condition for plate, sheet, bar and tube used in furnace and heat-treatment hardware. | 240 | 560 | 45 | 150 HB | — |
Cold drawn | Higher-strength bar with close tolerance and better chip breaking for machined furnace fasteners and pins. | 420 | 680 | 30 | 14 HRC | 2.2 % IACS |
Quarter hard | Light cold work for springy clips and formed strip where extra room-temperature strength is needed. | 520 | 760 | 22 | 20 HRC | 2.2 % IACS |
1/2HThis page Half hard | Heavier cold work for flat springs and high-strength wire; ductility and formability are much reduced. | 690 | 900 | 12 | 28 HRC | 2.2 % IACS |
What is 1.4845 1/2H?
1.4845 1/2H is 1.4845 supplied in the 1/2H condition — heavier cold work for flat springs and high-strength wire; ductility and formability are much reduced. 1.4845 1/2H has a yield strength of 690 MPa (100 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 196 GPa (28.4 Msi). 1.4845 1/2H has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). Annealed is the default condition FabDigit quotes; 1/2H is available on request or by drawing note.
Advantages
- High strength — 690 MPa (100 ksi), better than 92% of stainless steel grades
Limitations
- Limited ductility — 12%, worse than 95% of stainless steel grades
- High embodied carbon — 6 kg CO₂/kg, worse than 88% of stainless steel grades
- Difficult to weld — 52/100, worse than 76% of stainless steel grades
1.4845 1/2H properties
Typical room-temperature values for 1.4845 1/2H; 23 are specific to this condition. Other listed values are 1.4845 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4845 1/2H has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical15
1.4845 1/2H has a yield strength of 690 MPa (100 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
1.4845 1/2H is rated for continuous service to 650°C (1,202 °F). It conducts heat at 14.2 W/m·K (8.2 BTU/hr·ft·°F), worse than 76% of stainless steel grades. Thermal expansion is 15.9 µm/m·K (8.83 µin/in·°F).
Electrical3
1.4845 1/2H conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (63/100), better than 53% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4845 1/2H takes about 78 MJ of energy and emits 6 kg of CO₂ — more than 87% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4845 1/2H's machinability is poor (32/100, worse than 62% of stainless steel grades); weldability fair (52/100); formability poor (28/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4845 1/2H
Is 1.4845 easy to machine?
Gummy and strongly work-hardening — use rigid setups, positive-rake carbide, heavy feeds with no dwell, low-to-moderate speeds and copious coolant; expect roughly 40 % of 1212 productivity.
Can 1.4845 be welded?
Weld with matching 310/25-20 filler by GTAW/GMAW/SMAW without preheat and with low interpass temperature; fully austenitic weld metal is hot-cracking prone, so keep heat input and restraint low and dilution controlled.
Can 1.4845 be formed, bent or molded?
Cold forms well but needs ~50 % more force than 304 and generous bend radii; hot work at 1150–1200 °C and finish above 950 °C, then solution anneal at 1030–1180 °C with rapid cooling.
What surface finishes work on 1.4845?
Pickle and passivate (ASTM A967) or electropolish after fabrication to restore the chromium oxide film; not anodisable — mechanical polishing or a bright-annealed finish gives reflective surfaces.
1.4845 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 |
|---|---|---|
| CEN 1.4845 ≤0.10; ASTM 310S ≤0.08 | ≤ 0.1 | 0.06 |
| Siaids scaling resistance | ≤ 1.5 | 0.6 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.05 | 0.03 |
| SASTM A240 allows ≤0.030 | ≤ 0.02 | 0.01 |
| Cr | 24 – 26 | 25 |
| Ni | 19 – 22 | 20 |
| NEN 10088-2 limit | ≤ 0.11 | 0.04 |
| Fe | balance | — |
1.4845 1/2H — frequently asked
What is 1.4845 1/2H used for?
1.4845 1/2H is typically used for furnace muffles and retorts, heat treatment baskets and fixtures, kiln components, high-temp exhaust parts and radiant tubes. In short: oxidation resistance to 1150 °C; furnace-grade 25Cr-20Ni; higher heat limit than 304.
What is the yield strength of 1.4845 1/2H?
1.4845 1/2H has a typical yield strength of 690 MPa (100 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 92% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4845 1/2H easy to machine?
Not especially — machinability is rated poor (32/100, worse than 62% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, positive-rake carbide, heavy feeds with no dwell, low-to-moderate speeds and copious coolant; expect roughly 40 % of 1212 productivity.
Can 1.4845 1/2H be welded?
With care — weldability is rated fair (52/100). Weld with matching 310/25-20 filler by GTAW/GMAW/SMAW without preheat and with low interpass temperature; fully austenitic weld metal is hot-cracking prone, so keep heat input and restraint low and dilution controlled.
What surface finishes work on 1.4845 1/2H?
Pickle and passivate (ASTM A967) or electropolish after fabrication to restore the chromium oxide film; not anodisable — mechanical polishing or a bright-annealed finish gives reflective surfaces.
Can 1.4845 1/2H be formed, bent or molded?
Cold forms well but needs ~50 % more force than 304 and generous bend radii; hot work at 1150–1200 °C and finish above 950 °C, then solution anneal at 1030–1180 °C with rapid cooling.
What is the maximum service temperature of 1.4845 1/2H?
1.4845 1/2H is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4845 Annealed and 1.4845-CD?
Annealed is the default condition — standard stocked condition for plate, sheet, bar and tube used in furnace and heat-treatment hardware. CD: higher-strength bar with close tolerance and better chip breaking for machined furnace fasteners and pins. Yield strength is 240 MPa in Annealed versus 420 MPa in CD.
Sources
- EN 10088-1/-2/-3 Stainless steels — X8CrNi25-21 (1.4845) — CEN (2014)
- ASTM A240/A240M — Cr and Cr-Ni stainless plate, sheet, strip (UNS S31008) — ASTM International (2023)
- ASTM A276 / A312 — stainless bar and welded/seamless pipe — ASTM International (2023)
- GB/T 20878 / GB/T 4237 — 06Cr25Ni20 — SAC (2019)
- JIS G4304 SUS310S — JSA (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Outokumpu / Sandvik heat-resisting grade 310S data sheets — Outokumpu, Alleima (2023)
- SMM / Mysteel (310S ) — SMM / Mysteel (2025)
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.