Stainless Steel 1.4150
EN 1.4150
1.4150 (X53CrSiMoVN16-2) is a silicon-, vanadium- and nitrogen-alloyed 16% Cr martensitic stainless developed for high hardness and heat resistance in valve and engine hardware.
Reference datasheet — 1.4150 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 QT1100 condition
1.4150 tempers and conditions
1.4150 is supplied in 5 conditions, soft to hard. QT1100 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 |
|---|---|---|---|---|---|---|
Solution annealed | Delivery condition for machining, forging blanks and cold sawing before hardening. | 550 | 850 | 18 | 260 HB | — |
hardened and high-temperature tempered (Rm ≈ 900–1100 MPa) | Choose when maximum toughness and thermal stability above 600 °C matter more than hardness. | 780 | 1,000 | 15 | 31 HRC | — |
QT1100Default hardened and tempered (Rm ≈ 1100–1300 MPa, ≈ 35–43 HRC) | Standard supply/service condition for engine intake valves, stems and high-strength heat-resistant parts. | 950 | 1,200 | 12 | 39 HRC | — |
+QT + nitrided | Pick for valve stems and shafts needing 900–1100 HV surface wear resistance on a tough tempered core. | 950 | 1,200 | 10 | 39 HRC | 2.3 % IACS |
hardened and low tempered (≈ 45–50 HRC) | Use where wear resistance and seat hardness dominate and service temperature stays below ~450 °C. | 1,250 | 1,500 | 7 | 47 HRC | — |
Supply forms, finishes and certifications
Ways 1.4150 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Peeled | Peeled / ground bar | Coating |
What is 1.4150?
1.4150 (X53CrSiMoVN16-2) is a silicon-, vanadium- and nitrogen-alloyed 16% Cr martensitic stainless developed for high hardness and heat resistance in valve and engine hardware. It is supplied annealed (A), peeled, and in QT900, QT1100, QT1300 and QT+NIT conditions, with 950 MPa yield, 1200 MPa tensile, 12% elongation and 360 HB (39 HRC) as default and service to 650 °C. Weldability is poor, machinability is low (score 30) and cold forming is impractical, so parts are hot-forged and finish-machined before hardening. Where hot strength matters less, 1.4122 (X39CrMo17-1) machines and welds more easily. 1.4150 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). 1.4150 has a yield strength of 950 MPa (138 ksi) and a tensile strength of 1,200 MPa (174 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 215 GPa (31.2 Msi).
What is 1.4150 used for?
- exhaust valves
- high-temperature valve components
- high-strength fasteners
- pump internals
Advantages
- High strength — 950 MPa (138 ksi), better than 98% of stainless steel grades
- Conducts heat well — 22 W/m·K (12.7 BTU/hr·ft·°F), better than 77% of stainless steel grades
Limitations
- Low fracture toughness — 30 MPa·√m (27.3 ksi·√in), worse than 99% of stainless steel grades
- Limited ductility — 12%, worse than 95% of stainless steel grades
- Difficult to weld — 20/100, worse than 95% of stainless steel grades
- Limited formability — 15/100, worse than 91% of stainless steel grades
- Needs corrosion protection — 50/100, worse than 78% of stainless steel grades
1.4150 properties
Typical room-temperature values for 1.4150-QT1100; bars are the position among stainless steel grades.
Physical3
1.4150 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
1.4150 has a yield strength of 950 MPa (138 ksi) and a tensile strength of 1,200 MPa (174 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 215 GPa (31.2 Msi).
Thermal6
1.4150 is rated for continuous service to 650°C (1,202 °F). It conducts heat at 22 W/m·K (12.7 BTU/hr·ft·°F), better than 77% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4150 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4150 takes about 53 MJ of energy and emits 5.2 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 35%.
Manufacturability7
1.4150's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability poor (20/100); formability poor (15/100).
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. 1.4150 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4150
Is 1.4150 easy to machine?
Machine in the annealed state with sharp carbide tools, rigid setups and generous coolant; above ~40 HRC switch to CBN/ceramic finish turning or grinding.
Can 1.4150 be welded?
Poor weldability — preheat 250–350 °C, use matching or austenitic filler, and temper immediately after welding to avoid cold cracking.
Can 1.4150 be formed, bent or molded?
Hot forge/upset between about 1100 °C and 900 °C followed by slow cooling and soft annealing; cold forming is essentially limited to straightening.
1.4150 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 |
|---|---|---|
| Cdesignation-derived (X53) | 0.48 – 0.58 | 0.53 |
| Siraises scaling resistance and tempering stability | 1.7 – 2.3 | 2 |
| Mn | ≤ 0.8 | 0.4 |
| Pimpurity limit | ≤ 0.04 | |
| Simpurity limit | ≤ 0.03 | |
| Cr | 15 – 17 | 16 |
| Mohot strength / temper resistance | 0.8 – 1.3 | 1 |
| Vfine carbonitride strengthening | 0.2 – 0.5 | 0.35 |
| N | 0.05 – 0.15 | 0.1 |
| Niresidual | ≤ 0.6 | |
| Fe | balance |
What surface finishes work on 1.4150?
Passivate after hardening for best corrosion behaviour; stems are commonly nitrided or hard-chrome plated, and the fine carbide structure polishes to a good mirror finish.
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 1.4150 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X53CrSiMoVN16-2
How much does 1.4150 cost?
1.4150 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.
1.4150 — frequently asked
What is 1.4150 used for?
1.4150 is typically used for exhaust valves, high-temperature valve components, high-strength fasteners and pump internals. In short: high-strength valve steel; 650 °C martensitic stainless; nitrided stem applications.
What is the yield strength of 1.4150?
1.4150 has a typical yield strength of 950 MPa (138 ksi) and a tensile strength of 1,200 MPa (174 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4150 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machine in the annealed state with sharp carbide tools, rigid setups and generous coolant; above ~40 HRC switch to CBN/ceramic finish turning or grinding.
Can 1.4150 be welded?
Not readily — weldability is rated poor (20/100). Poor weldability — preheat 250–350 °C, use matching or austenitic filler, and temper immediately after welding to avoid cold cracking.
What surface finishes work on 1.4150?
Passivate after hardening for best corrosion behaviour; stems are commonly nitrided or hard-chrome plated, and the fine carbide structure polishes to a good mirror finish.
Can 1.4150 be formed, bent or molded?
Hot forge/upset between about 1100 °C and 900 °C followed by slow cooling and soft annealing; cold forming is essentially limited to straightening.
What is the maximum service temperature of 1.4150?
1.4150 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 1.4150-QT1100 and 1.4150-A?
QT1100 is the default condition — standard supply/service condition for engine intake valves, stems and high-strength heat-resistant parts. A: delivery condition for machining, forging blanks and cold sawing before hardening. Yield strength is 950 MPa in QT1100 versus 550 MPa in A.
How much does 1.4150 cost?
1.4150 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 10088-1 Stainless steels — List of stainless steels — CEN (2014)
- EN 10090 Steels and nickel alloys for valves for internal combustion engines — CEN (1998)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Stahlschlüssel (Key to Steel) — Verlag Stahlschlüssel Wegst (2019)
- Valve steel bar datasheets (martensitic Cr-Si-Mo-V grades) — Böhler / Sandvik (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.