Stainless Steel 1.4443
EN 1.4443
1.4443 (GX4CrNiMo19-11-3) is a standard-carbon cast Cr-Ni-Mo austenitic stainless steel close to ASTM A351 CF8M, with molybdenum slightly above the base CF8M range.
Reference datasheet — 1.4443 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 SA condition
1.4443 tempers and conditions
1.4443 is supplied in 3 conditions, soft to hard. SA 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 |
|---|---|---|---|---|---|---|
SADefault Solution annealed 1050–1100 °C, water quenched | Standard supply condition for chemical, pump and valve castings — maximum corrosion resistance and ductility. | 250 | 500 | 40 | 160 HB | — |
Spheroidize annealed | Only for non-critical, non-corrosive service or as an intermediate state before machining and final solution treatment. | 260 | 480 | 25 | 175 HB | 2.2 % IACS |
Hot isostatically pressed then solution annealed | Choose for pressure-containing or fatigue-loaded castings where shrinkage porosity must be closed (NORSOK/API pump and valve bodies). | 260 | 520 | 45 | 160 HB | 2.2 % IACS |
What is 1.4443?
1.4443 (GX4CrNiMo19-11-3) is a standard-carbon cast Cr-Ni-Mo austenitic stainless steel close to ASTM A351 CF8M, with molybdenum slightly above the base CF8M range. It serves general chemical and marine duty — pump casings, valve bodies and fittings — sand or investment cast and supplied solution annealed or HIP'd. Typical values are 250 MPa yield, 500 MPa tensile, 40 % elongation, 160 HB and service to 550 °C, with machinability rated 35. Its corrosion score (65) is the lowest of the Mo-bearing grades listed here; use low-carbon 1.4409 (CF3M) for as-welded corrosion service. 1.4443 has a density of 7.98 g/cm³ (0.288 lb/in³), heavier than 85% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4443 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 195 GPa (28.3 Msi).
What is 1.4443 used for?
- pump casings
- valve bodies
- marine fittings
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
1.4443 properties
Typical room-temperature values for 1.4443-SA; bars are the position among stainless steel grades.
Physical3
1.4443 has a density of 7.98 g/cm³ (0.288 lb/in³), heavier than 85% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4443 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4443 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4443 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 56% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4443 takes about 55 MJ of energy and emits 4.2 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.4443's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (72/100); 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. 1.4443 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4443
Is 1.4443 easy to machine?
Gummy and work-hardening: use rigid setups, sharp coated carbide, 60–120 m/min, heavy positive feed and flood coolant; avoid dwelling to prevent glazing.
Can 1.4443 be welded?
Readily welded with ER316L/E316L or 317L filler, no preheat, low interpass temperature; solution anneal after major repair welds to restore corrosion resistance of the standard-carbon matrix.
Can 1.4443 be formed, bent or molded?
Sand or investment cast with generous risering (high shrinkage ~2 %), controlled ferrite 5–20 FN for hot-tear resistance; no cold forming beyond light straightening.
1.4443 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 |
|---|---|---|
| Cstandard-carbon grade (GX4/GX5 class) | ≤ 0.07 | 0.05 |
| Si | ≤ 1.5 | 1 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Cr | 18 – 20 | 19 |
| Ni | 10 – 12 | 11 |
| Mohigher than CF8M (2.0–3.0 %), PREN ≈ 29 | 3 – 3.5 | 3.2 |
| Febalance, plus residual N ≤ 0.20 typical | balance |
What surface finishes work on 1.4443?
Pickle and passivate (nitric or citric) after grinding/welding; electropolish for hygienic service; not anodizable — mechanical polish limited by casting porosity.
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 1.4443 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- GX4CrNiMo19-11-3
- Similar grades
- A351 CF8M
How much does 1.4443 cost?
1.4443 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.
1.4443 — frequently asked
What is 1.4443 used for?
1.4443 is typically used for pump casings, valve bodies and marine fittings. In short: general-purpose CF8M-type casting; mo above base CF8M range.
What is the yield strength of 1.4443?
1.4443 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4443 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Gummy and work-hardening: use rigid setups, sharp coated carbide, 60–120 m/min, heavy positive feed and flood coolant; avoid dwelling to prevent glazing.
Can 1.4443 be welded?
Yes — weldability is rated very good (72/100). Readily welded with ER316L/E316L or 317L filler, no preheat, low interpass temperature; solution anneal after major repair welds to restore corrosion resistance of the standard-carbon matrix.
What surface finishes work on 1.4443?
Pickle and passivate (nitric or citric) after grinding/welding; electropolish for hygienic service; not anodizable — mechanical polish limited by casting porosity.
Can 1.4443 be formed, bent or molded?
Sand or investment cast with generous risering (high shrinkage ~2 %), controlled ferrite 5–20 FN for hot-tear resistance; no cold forming beyond light straightening.
What is the maximum service temperature of 1.4443?
1.4443 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.
What is the difference between 1.4443-SA and 1.4443-AC?
SA is the default condition — standard supply condition for chemical, pump and valve castings — maximum corrosion resistance and ductility. AC: only for non-critical, non-corrosive service or as an intermediate state before machining and final solution treatment. Yield strength is 250 MPa in SA versus 260 MPa in AC.
How much does 1.4443 cost?
1.4443 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 10213 — Steel castings for pressure purposes — CEN (2016)
- EN 10283 — Corrosion resistant steel castings — CEN (2010)
- ASTM A351/A351M — Castings, Austenitic, for Pressure-Containing Parts (CF8M) — ASTM (2022)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (cast corrosion-resistant steels) — ASM International (1990)
- Outokumpu Stainless Steel Handbook (316/316L physical data used as analogue) — Outokumpu (2013)
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.