Stainless Steel 1.4612
EN 1.4612
1.4612 (X1CrNiMoAlTi12-11-2, also listed as 1.4530 / S13800) is the highest-nickel member of the 12Cr-Ni-Mo-Al-Ti retaining-ring precipitation-hardening stainless series, developed for large turbogenerator rotor retaining rings that need very high strength.
Reference datasheet — 1.4612 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the +P1510 condition
1.4612 tempers and conditions
1.4612 is supplied in 3 conditions, soft to hard. +P1510 is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Delivery/intermediate condition for rough machining, forming and welding before precipitation hardening. | 750 | 950 | 16 | 30 HRC | — |
+P1510Default Precipitation hardened, Rm ≥ 1510 MPa | Standard high-strength ageing condition: best compromise of ~1500–1700 MPa strength with usable toughness and ductility. | 1,450 | 1,580 | 11 | 46 HRC | — |
Precipitation hardened, Rm ≥ 1650 MPa | Peak-strength ageing for the most heavily stressed rings/shafts; accept lower toughness and higher SCC/hydrogen sensitivity. | 1,580 | 1,720 | 9 | 50 HRC | — |
What is 1.4612?
1.4612 (X1CrNiMoAlTi12-11-2, also listed as 1.4530 / S13800) is the highest-nickel member of the 12Cr-Ni-Mo-Al-Ti retaining-ring precipitation-hardening stainless series, developed for large turbogenerator rotor retaining rings that need very high strength. Default aged properties are 1450 MPa yield, 1580 MPa tensile, 11 % elongation and 46 HRC (450 HB), with +AT, +P1510 and +P1650 conditions on file and supply mainly as heavy forgings and rolled rings. The trade-offs are low machinability (25/100), formability (20/100) and weldability (40/100), corrosion resistance of 55–60 class (58/100) and a 400 °C service ceiling. 1.4596 offers slightly lower strength with better weldability and toughness. 1.4612 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4612 has a yield strength of 1,450 MPa (210 ksi) and a tensile strength of 1,580 MPa (229 ksi) — stronger than 99% of stainless steel grades. Elongation at break is 11% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4612 used for?
- Large turbogenerator retaining rings
- Rotor forgings
- Non-magnetic rotor rings
- High-strength shafts and pins
- Heavily loaded clamping rings
Advantages
- High strength — 1,450 MPa (210 ksi), better than 99% of stainless steel grades
- Polishes to a fine finish — 85/100, better than 97% of stainless steel grades
Limitations
- Limited ductility — 11%, worse than 96% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
- Difficult to weld — 40/100, worse than 83% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
1.4612 properties
Typical room-temperature values for 1.4612-+P1510; bars are the position among stainless steel grades.
Physical3
1.4612 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4612 has a yield strength of 1,450 MPa (210 ksi) and a tensile strength of 1,580 MPa (229 ksi) — stronger than 99% of stainless steel grades. Elongation at break is 11% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4612 is rated for continuous service to 400°C (752 °F). It conducts heat at 17 W/m·K (9.82 BTU/hr·ft·°F), better than 71% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4612 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 62% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4612 takes about 58 MJ of energy and emits 4.8 kg of CO₂ — more than 66% of stainless steel grades. Typical recycled content is 25%.
Manufacturability8
1.4612's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability fair (40/100); formability poor (20/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4612 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4612
Is 1.4612 easy to machine?
Rough machine in +AT (≈30 HRC) and leave finish stock; in +P conditions use rigid setups, coated carbide, low speed/high feed and flood coolant — work hardens and burnishes readily.
Can 1.4612 be welded?
Weld only in the solution-annealed condition with matching low-C filler under clean/inert conditions, then re-solution and re-age; welding in the aged state locally overages the HAZ.
Can 1.4612 be formed, bent or molded?
Hot forge/roll well above ~1000 °C and cool controlled; cold forming is limited to light straightening and only in +AT.
1.4612 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 |
|---|---|---|
| Cultra-low carbon, VIM/VAR melted | ≤ 0.01 | 0.01 |
| Si | ≤ 0.1 | 0.05 |
| Mn | ≤ 0.1 | 0.05 |
| P | ≤ 0.02 | 0.01 |
| S | ≤ 0.01 | 0 |
| Cr | 11 – 12.5 | 11.8 |
| Nihighest Ni of the 12Cr-Ni-Mo-Al-Ti series | 10 – 11.5 | 11 |
| Mo | 1.5 – 2 | 1.8 |
| TiNi3Ti precipitation hardener | 0.5 – 1.4 | 0.9 |
| AlNiAl precipitation hardener | 0.2 – 0.8 | 0.4 |
| Fe | balance |
What surface finishes work on 1.4612?
Passivate per ASTM A967 after machining; grinding/polishing gives a fine surface, and thin dense chrome or nitriding can be used where wear resistance is needed — no anodizing.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4612 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X1CrNiMoAlTi12-11-2
- Similar grades
- 1.4530S13800
How much does 1.4612 cost?
1.4612 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4612 — frequently asked
What is 1.4612 used for?
1.4612 is typically used for large turbogenerator retaining rings, rotor forgings, non-magnetic rotor rings, high-strength shafts and pins and heavily loaded clamping rings. In short: highest-strength retaining ring; 1580 MPa tensile; non-magnetic when aged.
What is the yield strength of 1.4612?
1.4612 has a typical yield strength of 1,450 MPa (210 ksi) and a tensile strength of 1,580 MPa (229 ksi) — stronger than 99% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4612 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Rough machine in +AT (≈30 HRC) and leave finish stock; in +P conditions use rigid setups, coated carbide, low speed/high feed and flood coolant — work hardens and burnishes readily.
Can 1.4612 be welded?
With care — weldability is rated fair (40/100). Weld only in the solution-annealed condition with matching low-C filler under clean/inert conditions, then re-solution and re-age; welding in the aged state locally overages the HAZ.
What surface finishes work on 1.4612?
Passivate per ASTM A967 after machining; grinding/polishing gives a fine surface, and thin dense chrome or nitriding can be used where wear resistance is needed — no anodizing.
Can 1.4612 be formed, bent or molded?
Hot forge/roll well above ~1000 °C and cool controlled; cold forming is limited to light straightening and only in +AT.
What is the maximum service temperature of 1.4612?
1.4612 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4612 cost?
1.4612 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10088-3 Stainless steels — Technical delivery conditions for semi-finished products, bars, rods — CEN (2014)
- EN 10088-1 Stainless steels — List of stainless steels (physical properties) — CEN (2014)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (PH stainless steels) — ASM International (1990)
- ASTM A564/A564M — Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars (UNS S13800 comparison) — ASTM (2019)
- Maraging-type 12Cr-Ni-Mo-Al-Ti stainless forging grades (comparative producer data) — Special steel producers (e.g. Böhler/voestalpine, Aubert & Duval) (2022)
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.