Steel G15CrMoV6-9
EN 1.7710
G15CrMoV6-9 (1.7710) is a low-alloy Cr-Mo-V cast steel to EN 10213, designed for creep resistance in pressure-retaining castings operating around 500–550 °C.
Reference datasheet — G15CrMoV6-9 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 +QT1 condition
G15CrMoV6-9 tempers and conditions
G15CrMoV6-9 is supplied in 3 conditions, soft to hard. +QT1 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 |
|---|---|---|---|---|---|---|
Annealed | Not a pressure-service supply condition — foundry/shop condition used to ease rough machining and weld repair before final quench and temper. | 340 | 560 | 22 | 165 HB | 8 % IACS |
+QT1Default Quenched and tempered, lower strength class | Standard supply condition for creep-loaded pressure castings: best ductility, toughness and long-term microstructural stability up to ~550 °C. | 480 | 650 | 17 | 15 HRC | — |
Quenched and tempered, higher strength class | Choose when higher room-temperature proof strength is needed for wall-thickness reduction in valve/turbine castings, accepting lower ductility, lower impact energy and a slightly reduced upper service temperature. | 580 | 760 | 14 | 23 HRC | — |
What is G15CrMoV6-9?
G15CrMoV6-9 (1.7710) is a low-alloy Cr-Mo-V cast steel to EN 10213, designed for creep resistance in pressure-retaining castings operating around 500–550 °C. In the quenched and tempered condition it provides about 480 MPa yield, 650 MPa tensile, 17 % elongation and 200 HB (15 HRC), and it is supplied as sand or resin-sand castings in +QT1, +QT2 and annealed conditions. It has no useful corrosion resistance (score 15) and is only moderately machinable (45) and weldable (50): welding needs preheat and mandatory PWHT, and vanadium carbides are abrasive to tooling. Where service temperature and creep demands are lower, G12MoCrV5-2 is the usual alternative. G15CrMoV6-9 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). G15CrMoV6-9 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 59% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
What is G15CrMoV6-9 used for?
- steam turbine valve bodies
- high-temperature pump casings
- power plant pressure part castings
- steam chest housings
Advantages
- High service temperature — 550°C (1,022 °F), better than 95% of steel grades
Limitations
- Limited formability — 10/100, worse than 95% of steel grades
G15CrMoV6-9 properties
Typical room-temperature values for G15CrMoV6-9-+QT1; bars are the position among steel grades.
Physical3
G15CrMoV6-9 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
G15CrMoV6-9 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 59% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
G15CrMoV6-9 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
G15CrMoV6-9 conducts electricity at 7.5 % IACS, worse than 67% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of G15CrMoV6-9 takes about 24 MJ of energy and emits 2 kg of CO₂ — less than 97% of steel grades. Typical recycled content is 60%.
Manufacturability8
G15CrMoV6-9's machinability is fair (45/100, worse than 65% of steel grades); weldability fair (50/100); formability not recommended (10/100).
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. G15CrMoV6-9 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with G15CrMoV6-9
Is G15CrMoV6-9 easy to machine?
Machine in the +QT or annealed condition with rigid setups and coated carbide (~80-140 m/min turning); the vanadium carbides are abrasive, so keep feeds positive and avoid dwelling to prevent work hardening.
Can G15CrMoV6-9 be welded?
Weldable with matching 1.5Cr-1Mo-V (or 2.25Cr-1Mo) filler using preheat 200-300 °C, tight interpass control, and mandatory PWHT ~700-740 °C; hydrogen control and low-sulphur base metal are essential to avoid reheat cracking.
Can G15CrMoV6-9 be formed, bent or molded?
Supplied as sand/resin-sand castings — design generous fillets and directional feeding, and always normalize+quench+temper the whole casting rather than cold working it.
G15CrMoV6-9 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 |
|---|---|---|
| Cgrade designation number 15 = 0.15 % C | 0.12 – 0.18 | 0.15 |
| Si | ≤ 0.6 | 0.35 |
| Mn | 0.4 – 0.8 | 0.6 |
| Pcreep-steel cleanliness limit | ≤ 0.02 | |
| S | ≤ 0.02 | |
| Crdesignation digit 6 → ~1.5 % | 1.3 – 1.7 | 1.5 |
| Modesignation digit 9 → ~0.9 % | 0.8 – 1 | 0.9 |
| Vcarbide former giving creep strength | 0.2 – 0.35 | 0.28 |
| Niresidual | ≤ 0.4 | |
| Fe | balance |
What surface finishes work on G15CrMoV6-9?
Shot-blast and prime or use high-temperature aluminium/silicone paint; on steam surfaces rely on the protective oxide plus a corrosion allowance, and use phosphating or nickel plating only for non-service faces.
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 G15CrMoV6-9 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.7710
How much does G15CrMoV6-9 cost?
G15CrMoV6-9 is a premium-cost 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.
G15CrMoV6-9 — frequently asked
What is G15CrMoV6-9 used for?
G15CrMoV6-9 is typically used for steam turbine valve bodies, high-temperature pump casings, power plant pressure part castings and steam chest housings. In short: creep-resistant cast steel; 550 °C pressure castings; needs preheat and PWHT.
What is the yield strength of G15CrMoV6-9?
G15CrMoV6-9 has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 650 MPa (94.3 ksi) — stronger than 59% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is G15CrMoV6-9 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine in the +QT or annealed condition with rigid setups and coated carbide (~80-140 m/min turning); the vanadium carbides are abrasive, so keep feeds positive and avoid dwelling to prevent work hardening.
Can G15CrMoV6-9 be welded?
With care — weldability is rated fair (50/100). Weldable with matching 1.5Cr-1Mo-V (or 2.25Cr-1Mo) filler using preheat 200-300 °C, tight interpass control, and mandatory PWHT ~700-740 °C; hydrogen control and low-sulphur base metal are essential to avoid reheat cracking.
What surface finishes work on G15CrMoV6-9?
Shot-blast and prime or use high-temperature aluminium/silicone paint; on steam surfaces rely on the protective oxide plus a corrosion allowance, and use phosphating or nickel plating only for non-service faces.
Can G15CrMoV6-9 be formed, bent or molded?
Supplied as sand/resin-sand castings — design generous fillets and directional feeding, and always normalize+quench+temper the whole casting rather than cold working it.
What is the maximum service temperature of G15CrMoV6-9?
G15CrMoV6-9 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does G15CrMoV6-9 cost?
G15CrMoV6-9 is a premium-cost 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 10213 — Steel castings for pressure purposes — CEN (2016)
- DIN 17245 — Ferritic steel castings for elevated temperature service (superseded) — DIN (1987)
- EN 10027-2 — Numerical designation system for steels (material number 1.7710) — CEN (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13A/13C — Corrosion — ASM International (2003)
- Steel Castings Handbook — Steel Founders' Society of America / ASM (1995)
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.