Stainless Steel 1.4710
EN 1.4710
1.4710 (GX30CrSi7) is a 7% Cr silicon-alloyed cast ferritic steel supplied as-cast (AC), annealed (A) or stress relieved (SR).
Reference datasheet — 1.4710 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 A condition
1.4710 tempers and conditions
1.4710 is supplied in 3 conditions, soft to hard. A 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 |
|---|---|---|---|---|---|---|
ADefault Solution annealed | Standard supply condition: softens the air-hardened matrix for machining and gives the mechanical values quoted in EN 10295. | 290 | 520 | 6 | 205 HB | — |
Stress relieved | Used on complex thin-wall manifolds/turbine housings to remove casting and welding stresses without fully softening the part. | 330 | 570 | 4 | 20 HRC | 2.4 % IACS |
Spheroidize annealed | Cheapest route for exhaust/turbo parts where strength matters more than machining and ductility; structure is partly air-hardened. | 400 | 640 | 2 | 26 HRC | 2.4 % IACS |
What is 1.4710?
1.4710 (GX30CrSi7) is a 7% Cr silicon-alloyed cast ferritic steel supplied as-cast (AC), annealed (A) or stress relieved (SR). It gives 290 MPa yield, 520 MPa tensile, 6% elongation and about 205 HB with service to 850 °C, and the high silicon content provides the fluidity needed for thin-wall exhaust manifolds and turbocharger housings. Corrosion resistance is low (rated 30) — 7% Cr will not prevent rusting in wet service — and machinability is limited (40). Where higher oxidation and corrosion resistance is required, 1.4729 (13Cr-Si) is the next grade up. 1.4710 has a density of 7.65 g/cm³ (0.276 lb/in³), lighter than 96% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4710 has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 205 GPa (29.7 Msi).
What is 1.4710 used for?
- exhaust manifolds
- turbocharger housings
- moderate-temperature exhaust components
Advantages
- Low embodied carbon — 2.6 kg CO₂/kg, better than 100% of stainless steel grades
- Conducts heat well — 26 W/m·K (15 BTU/hr·ft·°F), better than 96% of stainless steel grades
- High service temperature — 850°C (1,562 °F), better than 80% of stainless steel grades
Limitations
- Limited ductility — 6%, worse than 99% of stainless steel grades
- Needs corrosion protection — 30/100, worse than 99% of stainless steel grades
- Limited formability — 5/100, worse than 99% of stainless steel grades
- Hard to polish — 40/100, worse than 99% of stainless steel grades
- Difficult to weld — 30/100, worse than 88% of stainless steel grades
1.4710 properties
Typical room-temperature values for 1.4710-A; bars are the position among stainless steel grades.
Physical3
1.4710 has a density of 7.65 g/cm³ (0.276 lb/in³), lighter than 96% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical14
1.4710 has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
1.4710 is rated for continuous service to 850°C (1,562 °F). It conducts heat at 26 W/m·K (15 BTU/hr·ft·°F), better than 96% of stainless steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical2
1.4710 has an electrical resistivity of 7.2×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is poor (30/100), worse than 99% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4710 takes about 34 MJ of energy and emits 2.6 kg of CO₂ — less than 100% of stainless steel grades. Typical recycled content is 80%.
Manufacturability8
1.4710's machinability is fair (40/100, better than 72% of stainless steel grades); weldability poor (30/100); formability not recommended (5/100).
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. 1.4710 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4710
Is 1.4710 easy to machine?
Machine in the annealed condition with rigid setups, carbide inserts and moderate speeds; Cr carbides and cast skin are abrasive and work-harden the surface.
Can 1.4710 be welded?
Weldable for repair with matching Cr-Si or austenitic (309/312) filler; preheat 200–300 °C, hold interpass temperature and stress relieve/anneal after welding to avoid hard-zone cracking.
Can 1.4710 be formed, bent or molded?
Supplied only as sand or shell castings — good fluidity from the high silicon allows thin-wall manifolds; no cold forming, keep sections uniform to limit hot tearing.
1.4710 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 |
|---|---|---|
| C | 0.2 – 0.35 | 0.3 |
| Sikey for scaling resistance | 1 – 2.5 | 1.7 |
| Mn | ≤ 1 | 0.6 |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Cr | 6 – 8 | 7 |
| Niresidual | ≤ 0.5 | |
| Fe | balance |
What surface finishes work on 1.4710?
Shot blast the oxide skin; protect wet-service faces with high-temperature aluminium/silicone paint, aluminising or ceramic coating since the 7% Cr level will not prevent rusting.
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 1.4710 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- GX30CrSi7
How much does 1.4710 cost?
1.4710 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.
1.4710 — frequently asked
What is 1.4710 used for?
1.4710 is typically used for exhaust manifolds, turbocharger housings and moderate-temperature exhaust components. In short: low-cost exhaust casting grade; 850 °C scaling limit; thin-wall casting fluidity.
What is the yield strength of 1.4710?
1.4710 has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 72% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4710 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Machine in the annealed condition with rigid setups, carbide inserts and moderate speeds; Cr carbides and cast skin are abrasive and work-harden the surface.
Can 1.4710 be welded?
Not readily — weldability is rated poor (30/100). Weldable for repair with matching Cr-Si or austenitic (309/312) filler; preheat 200–300 °C, hold interpass temperature and stress relieve/anneal after welding to avoid hard-zone cracking.
What surface finishes work on 1.4710?
Shot blast the oxide skin; protect wet-service faces with high-temperature aluminium/silicone paint, aluminising or ceramic coating since the 7% Cr level will not prevent rusting.
Can 1.4710 be formed, bent or molded?
Supplied only as sand or shell castings — good fluidity from the high silicon allows thin-wall manifolds; no cold forming, keep sections uniform to limit hot tearing.
What is the maximum service temperature of 1.4710?
1.4710 is rated for continuous use to about 850°C (1,562 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4710-A and 1.4710-AC?
A is the default condition — standard supply condition: softens the air-hardened matrix for machining and gives the mechanical values quoted in EN 10295. AC: cheapest route for exhaust/turbo parts where strength matters more than machining and ductility; structure is partly air-hardened. Yield strength is 290 MPa in A versus 400 MPa in AC.
How much does 1.4710 cost?
1.4710 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 10295 — Heat resistant steel castings — CEN (2002)
- DIN 17465 (withdrawn) — Heat resisting steel castings — DIN (1990)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Heat-resistant cast steel grade datasheets (exhaust manifold / turbocharger housing alloys) — European and Chinese foundries (2023)
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.