Stainless Steel 1.4415
EN 1.4415 · UNS S41426
1.4415 (X2CrNiMoV13-5-2, UNS S41426) is an ultra-low-carbon 13Cr-5Ni-2Mo-V soft martensitic stainless, a higher-strength development of 1.4313.
Reference datasheet — 1.4415 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 +QT850 condition
1.4415 tempers and conditions
1.4415 is supplied in 5 conditions, soft to hard. +QT850 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for rough machining of large forgings before final quench and temper; lowest hardness available for this grade. | 560 | 780 | 20 | 24 HRC | — |
Quenched and tempered, Rm 750–950 MPa class | Pick when maximum toughness, weld repairability and sour-service margin matter more than strength (hydro turbine runners, large valve bodies). | 620 | 820 | 18 | 25 HRC | — |
+QT850Default Quenched and tempered, Rm 850–1000 MPa class | Standard stocked forging condition — highest strength of the two EN classes while retaining good CVN toughness; use for pump/compressor shafts and highly loaded valve and turbine parts. | 720 | 900 | 17 | 29 HRC | — |
Q&T to NACE MR0175 / ISO 15156-3 sour-service limits | Pick for H2S-containing oil & gas hardware — double-tempered to a capped hardness with documented H2S partial pressure, chloride and temperature envelope. | 720 | 900 | 17 | 30 HRC | 2.7 % IACS |
Quenched and tempered, ~900–1100 MPa high-strength class | Special-order high-strength condition for shafts and OCTG-type components where hardness above 32 HRC is acceptable (not for sour service). | 800 | 980 | 15 | 33 HRC | — |
What is 1.4415?
1.4415 (X2CrNiMoV13-5-2, UNS S41426) is an ultra-low-carbon 13Cr-5Ni-2Mo-V soft martensitic stainless, a higher-strength development of 1.4313. Quenched and tempered it reaches 720 MPa yield, 900 MPa tensile, 17 % elongation and 285 HB (29 HRC) with service to 450 °C, and is supplied as forged bar, shafts and heavy sections, including NACE-qualified tempers for sour service. Machinability is limited and cold forming is impractical in the Q&T condition, while corrosion resistance remains that of a 13 % Cr alloy; use a duplex grade for continuous seawater exposure. 1.4415 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). 1.4415 has a yield strength of 720 MPa (104 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 93% of stainless steel grades. Elongation at break is 17% and the elastic modulus is 215 GPa (31.2 Msi).
What is 1.4415 used for?
- High-head hydro turbine runners
- Offshore pump shafts
- Marine valve components
Advantages
- High strength — 720 MPa (104 ksi), better than 93% of stainless steel grades
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- High electrical conductivity — 2.7 % IACS, better than 78% of stainless steel grades
Limitations
- Limited ductility — 17%, worse than 86% of stainless steel grades
- Needs corrosion protection — 50/100, worse than 78% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
1.4415 properties
Typical room-temperature values for 1.4415-+QT850; bars are the position among stainless steel grades.
Physical3
1.4415 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).
Mechanical16
1.4415 has a yield strength of 720 MPa (104 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 93% of stainless steel grades. Elongation at break is 17% and the elastic modulus is 215 GPa (31.2 Msi).
Thermal6
1.4415 is rated for continuous service to 450°C (842 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4415 conducts electricity at 2.7 % IACS, better than 78% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4415 takes about 53 MJ of energy and emits 3.6 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 50%.
Manufacturability8
1.4415's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (70/100); formability poor (25/100).
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. 1.4415 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4415
Is 1.4415 easy to machine?
Machine like Q&T 13Cr-4Ni: rigid setups, sharp positive-rake carbide (or coated CVD grades), moderate speed with heavy constant feed to avoid work-hardened glazing; flood coolant and avoid dwelling.
Can 1.4415 be welded?
Very good for a martensitic grade thanks to <0.03 % C — GTAW/GMAW/SMAW with matching 13/4 or 13/5 filler, preheat/interpass typically 100–160 °C, then post-weld temper (single or double) below Ac1 to restore toughness.
Can 1.4415 be formed, bent or molded?
Hot forge/roll around 1100–1150 °C with controlled finishing temperature; cold forming is limited in the Q&T condition, so bending and straightening should be done warm or in the annealed state.
1.4415 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 (X2) | ≤ 0.03 | 0.02 |
| Si | ≤ 0.7 | 0.4 |
| Mn | ≤ 1.5 | 0.7 |
| P | ≤ 0.03 | |
| S≤0.005 typical for sour service (S41426) | ≤ 0.01 | |
| Cr | 12 – 14 | 13 |
| Ni | 4.5 – 6 | 5.2 |
| Mo | 1.5 – 2.5 | 2 |
| VV addition distinguishes this grade from 1.4313 | 0.1 – 0.5 | 0.3 |
| N | ≤ 0.08 | 0.03 |
| Curesidual limit per sour-service practice | ≤ 0.3 | |
| Fe | balance |
What surface finishes work on 1.4415?
Passivate per ASTM A967 or electropolish after machining; takes a good mechanical polish, and can be nitrided or hard-chrome plated for wear surfaces (no anodizing — ferrous alloy).
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 1.4415 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S41426
- EN / DIN / Werkstoff-Nr.
- X2CrNiMoV13-5-2
How much does 1.4415 cost?
1.4415 is a premium-cost stainless steel ($$$), cheaper than about 51% 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.
1.4415 — frequently asked
What is 1.4415 used for?
1.4415 is typically used for high-head hydro turbine runners, offshore pump shafts and marine valve components. In short: stronger than 1.4313; NACE-capable soft martensitic; weldable at 29 HRC.
What is the yield strength of 1.4415?
1.4415 has a typical yield strength of 720 MPa (104 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 93% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4415 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Machine like Q&T 13Cr-4Ni: rigid setups, sharp positive-rake carbide (or coated CVD grades), moderate speed with heavy constant feed to avoid work-hardened glazing; flood coolant and avoid dwelling.
Can 1.4415 be welded?
Yes — weldability is rated very good (70/100). Very good for a martensitic grade thanks to <0.03 % C — GTAW/GMAW/SMAW with matching 13/4 or 13/5 filler, preheat/interpass typically 100–160 °C, then post-weld temper (single or double) below Ac1 to restore toughness.
What surface finishes work on 1.4415?
Passivate per ASTM A967 or electropolish after machining; takes a good mechanical polish, and can be nitrided or hard-chrome plated for wear surfaces (no anodizing — ferrous alloy).
Can 1.4415 be formed, bent or molded?
Hot forge/roll around 1100–1150 °C with controlled finishing temperature; cold forming is limited in the Q&T condition, so bending and straightening should be done warm or in the annealed state.
What is the maximum service temperature of 1.4415?
1.4415 is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4415 +QT850 and 1.4415 QT-NACE?
+QT850 is the default condition — standard stocked forging condition — highest strength of the two EN classes while retaining good CVN toughness; use for pump/compressor shafts and highly loaded valve and turbine parts. QT-NACE: pick for H2S-containing oil & gas hardware — double-tempered to a capped hardness with documented H2S partial pressure, chloride and temperature envelope. Yield strength is 720 MPa in +QT850 versus 720 MPa in QT-NACE.
How much does 1.4415 cost?
1.4415 is a premium-cost stainless steel ($$$), cheaper than about 51% 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, wire, sections — CEN (2014)
- EN 10250-4 Open die steel forgings for general engineering purposes — Stainless steels — CEN (2000)
- ISO 15156-3 / NACE MR0175 — Cracking-resistant CRAs for H2S-containing environments (UNS S41426) — ISO/NACE (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Soft martensitic stainless steel forging grades (13Cr-4Ni / 13Cr-5Ni-2Mo) datasheets — European forging/long-product producers (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.