Steel X16CrMo5-1
EN X16CrMo5-1
X16CrMo5-1 (1.7366, A182 F5a) is a 5 % Cr–1 % Mo martensitic alloy steel from the EN heat-resistant Cr-Mo family, run at higher carbon than standard F5 for extra strength in hot service.
Reference datasheet — X16CrMo5-1 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 +NT condition
X16CrMo5-1 tempers and conditions
X16CrMo5-1 is supplied in 4 conditions, soft to hard. +NT is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest supply condition for machining, deep boring and cold work before final heat treatment. | 330 | 560 | 24 | 170 HB | — |
+NTDefault Normalized and tempered | Standard delivery condition for A182 F5a flanges, valve bodies and high-temperature pressure forgings. | 500 | 700 | 20 | 20 HRC | — |
Quenched and tempered | Higher-strength condition used for bolting (EN 10269) and heavy forgings where yield above 500 MPa is required. | 620 | 820 | 17 | 25 HRC | — |
Normalized | Intermediate condition after hot forging; hard and brittle, normally tempered before service. | 650 | 900 | 14 | 29 HRC | — |
What is X16CrMo5-1?
X16CrMo5-1 (1.7366, A182 F5a) is a 5 % Cr–1 % Mo martensitic alloy steel from the EN heat-resistant Cr-Mo family, run at higher carbon than standard F5 for extra strength in hot service. Engineers specify it for forged valve internals, flanges and high-temperature bolting that must hold 500 MPa yield, 700 MPa tensile and 20 % elongation at about 210 HB (20 HRC) up to 600 °C; usual forms are bar, forgings and flanges in +A, +N, +NT and +QT. The matrix air-hardens, so weldability (45) and formability (30) are limited and post-weld heat treatment is mandatory. Corrosion resistance is oxidation-only (26); X11CrMo9-1 / A335 P9 is the usual step up when more chromium is needed. X16CrMo5-1 has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 93% of steel grades. It melts at 1,450°C (2,642 °F). X16CrMo5-1 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 63% of steel grades. Elongation at break is 20% and the elastic modulus is 213 GPa (30.9 Msi).
What is X16CrMo5-1 used for?
- valve seats
- high-temperature fasteners
- flanges
Advantages
- High service temperature — 600°C (1,112 °F), better than 98% of steel grades
- Good corrosion resistance — 26/100, better than 93% of steel grades
Limitations
- Low electrical conductivity — 2.9 % IACS, worse than 93% of steel grades
X16CrMo5-1 properties
Typical room-temperature values for X16CrMo5-1-+NT; bars are the position among steel grades.
Physical3
X16CrMo5-1 has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 93% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
X16CrMo5-1 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 63% of steel grades. Elongation at break is 20% and the elastic modulus is 213 GPa (30.9 Msi).
Thermal6
X16CrMo5-1 is rated for continuous service to 600°C (1,112 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 73% of steel grades. Thermal expansion is 11.3 µm/m·K (6.28 µin/in·°F).
Electrical3
X16CrMo5-1 conducts electricity at 2.9 % IACS, worse than 93% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (26/100), better than 93% of steel grades.
Sustainability4
Producing a kilogram of X16CrMo5-1 takes about 34 MJ of energy and emits 2.4 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
X16CrMo5-1's machinability is fair (42/100, worse than 73% of steel grades); weldability fair (45/100); formability poor (30/100).
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 steel family
Yield strength against density for every steel grade FabDigit runs. X16CrMo5-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with X16CrMo5-1
Is X16CrMo5-1 easy to machine?
Machine in the annealed or N+T state with rigid setups, coated carbide and generous coolant; the air-hardening matrix work-hardens and burnishes if feeds are too light.
Can X16CrMo5-1 be welded?
Weld with matching 5Cr-0.5Mo (E8018-B6 / ER80S-B6) filler, 200–300 °C preheat and interpass, and mandatory 700–760 °C post-weld heat treatment to avoid hard, crack-prone HAZ.
Can X16CrMo5-1 be formed, bent or molded?
Hot forge at 1050–1150 °C and finish above 900 °C, then slow-cool or immediately anneal; cold forming is limited to gentle bends because the steel hardens on air cooling.
X16CrMo5-1 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 |
|---|---|---|
| Chigher than X11CrMo5 / F5 for extra strength | 0.12 – 0.2 | 0.16 |
| Si | ≤ 0.5 | 0.3 |
| Mn | 0.4 – 0.8 | 0.6 |
| P | ≤ 0.03 | |
| S≤0.015 for pressure/bolting grades | ≤ 0.02 | |
| Cr | 4 – 6 | 5 |
| Mo | 0.45 – 0.65 | 0.55 |
| Niresidual | ≤ 0.3 | |
| Fe | balance |
What surface finishes work on X16CrMo5-1?
Not anodizable — protect with paint, aluminizing, thermal-spray or phosphating; polishes to a fair finish but will rust in humid storage without oiling.
Surface treatments FabDigit runs on 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).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel X16CrMo5-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.7366
- Similar grades
- A182 F5a
How much does X16CrMo5-1 cost?
X16CrMo5-1 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
X16CrMo5-1 — frequently asked
What is X16CrMo5-1 used for?
X16CrMo5-1 is typically used for valve seats, high-temperature fasteners and flanges. In short: higher-carbon 5Cr-1Mo grade; 600 °C forging steel; air-hardening, PWHT mandatory.
What is the yield strength of X16CrMo5-1?
X16CrMo5-1 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 63% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is X16CrMo5-1 easy to machine?
Not especially — machinability is rated fair (42/100, worse than 73% of steel grades). Machine in the annealed or N+T state with rigid setups, coated carbide and generous coolant; the air-hardening matrix work-hardens and burnishes if feeds are too light.
Can X16CrMo5-1 be welded?
With care — weldability is rated fair (45/100). Weld with matching 5Cr-0.5Mo (E8018-B6 / ER80S-B6) filler, 200–300 °C preheat and interpass, and mandatory 700–760 °C post-weld heat treatment to avoid hard, crack-prone HAZ.
What surface finishes work on X16CrMo5-1?
Not anodizable — protect with paint, aluminizing, thermal-spray or phosphating; polishes to a fair finish but will rust in humid storage without oiling.
Can X16CrMo5-1 be formed, bent or molded?
Hot forge at 1050–1150 °C and finish above 900 °C, then slow-cool or immediately anneal; cold forming is limited to gentle bends because the steel hardens on air cooling.
What is the maximum service temperature of X16CrMo5-1?
X16CrMo5-1 is rated for continuous use to about 600°C (1,112 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does X16CrMo5-1 cost?
X16CrMo5-1 is a standard-cost steel ($$), cheaper than about 71% 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 10222-2 — Steel forgings for pressure purposes: ferritic and martensitic steels with elevated-temperature properties — CEN (2017)
- EN 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties — CEN (2013)
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves and Parts (grade F5a) — ASTM International (2023)
- ASME BPVC Section II Part D — Materials, Properties (5Cr-1/2Mo) — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- API RP 941 — Steels for Hydrogen Service at Elevated Temperatures — API (2016)
- 12Cr5Mo/1Cr5Mo — Mysteel / 1688 (2026)
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.