Stainless Steel 1.4849-SC
Finish state
EN 1.4849
SC = statically (sand) cast, as-cast
Choose for fittings, return bends, headers, tube supports and shaped parts that cannot be centrifugally cast; coarser grain and slightly lower ductility.
Values for the SC condition
Other 1.4849 tempers and conditions
1.4849 is listed in 3 conditions; see the grade overview at 1.4849.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed ~1150 °C, rapid cooled | Occasionally specified to dissolve part of the primary carbide network and restore ductility before heavy machining or weld repair of thick sections. | 235 | 470 | 15 | 165 HB | 1.7 % IACS |
SCThis page Statically (sand) cast, as-cast | Choose for fittings, return bends, headers, tube supports and shaped parts that cannot be centrifugally cast; coarser grain and slightly lower ductility. | 240 | 460 | 8 | 175 HB | 1.7 % IACS |
Thermally aged / service exposed | Reference condition for integrity assessment of tubes after service: secondary carbide and G-phase precipitation embrittles the alloy at room temperature. | 290 | 500 | 3 | 17 HRC | 1.8 % IACS |
What is 1.4849-SC?
1.4849-SC is 1.4849 supplied in the SC condition — choose for fittings, return bends, headers, tube supports and shaped parts that cannot be centrifugally cast; coarser grain and slightly lower ductility. 1.4849-SC has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 168 GPa (24.4 Msi). 1.4849-SC has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- Low stiffness — 168 GPa (24.4 Msi), worse than 100% of stainless steel grades
- Limited ductility — 8%, worse than 99% of stainless steel grades
- Difficult to machine — 18/100, worse than 99% of stainless steel grades
- Limited formability — 5/100, worse than 99% of stainless steel grades
- Low strength — 240 MPa (34.8 ksi), worse than 96% of stainless steel grades
1.4849-SC properties
Typical room-temperature values for 1.4849-SC; 21 are specific to this condition. Other listed values are 1.4849 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4849-SC has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Mechanical12
1.4849-SC has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 168 GPa (24.4 Msi).
Thermal6
1.4849-SC is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 13.5 W/m·K (7.8 BTU/hr·ft·°F), worse than 83% of stainless steel grades. Thermal expansion is 15 µm/m·K (8.33 µin/in·°F).
Electrical3
1.4849-SC conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 59% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4849-SC takes about 80 MJ of energy and emits 6.2 kg of CO₂ — more than 89% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.4849-SC's machinability is poor (18/100, worse than 99% of stainless steel grades); weldability good (55/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4849-SC
Is 1.4849 easy to machine?
Machine with rigid setups, positive-rake carbide or ceramic inserts, low speed and heavy constant feed; the Nb/Cr carbide network is abrasive and the austenite work-hardens, so avoid dwelling and interrupted light cuts.
Can 1.4849 be welded?
Weld as-cast with matching 38-19Nb filler (GTAW root, SMAW/FCAW fill), low heat input, no preheat needed for new material; aged/service-exposed tubes need degreasing, decarburising burn-out or buttering plus a temper-bead/dilution-control procedure.
Can 1.4849 be formed, bent or molded?
Not cold formable — shape is fixed by centrifugal or static casting; keep uniform wall, generous fillets and a machining allowance on the bore for the columnar-grain layer.
What surface finishes work on 1.4849?
Normally supplied shot-blasted or machined bore/OD; no plating or anodising is used, and a protective Cr2O3/SiO2 scale is grown in service, so avoid chloride-bearing marking inks and grinding contamination from carbon steel.
1.4849 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 |
|---|---|---|
| Cprimary carbide former with Nb/Cr | 0.3 – 0.5 | 0.4 |
| Siimproves carburisation resistance | 1 – 2.5 | 1.7 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| Cr | 18 – 21 | 19 |
| Ni | 36 – 39 | 38 |
| Nbstabilises carbides, raises creep strength | 1.2 – 1.8 | 1.5 |
| Fe | balance | — |
1.4849-SC — frequently asked
What is 1.4849-SC used for?
1.4849-SC is typically used for ethylene cracking coil tubes, steam reformer tubes and petrochemical radiant furnace fittings. In short: high-Ni carburization resistance; centrifugal tube alloy; machinability score 20.
What is the yield strength of 1.4849-SC?
1.4849-SC has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 96% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4849-SC easy to machine?
Not especially — machinability is rated poor (18/100, worse than 99% of stainless steel grades). Machine with rigid setups, positive-rake carbide or ceramic inserts, low speed and heavy constant feed; the Nb/Cr carbide network is abrasive and the austenite work-hardens, so avoid dwelling and interrupted light cuts.
Can 1.4849-SC be welded?
Yes — weldability is rated good (55/100). Weld as-cast with matching 38-19Nb filler (GTAW root, SMAW/FCAW fill), low heat input, no preheat needed for new material; aged/service-exposed tubes need degreasing, decarburising burn-out or buttering plus a temper-bead/dilution-control procedure.
What surface finishes work on 1.4849-SC?
Normally supplied shot-blasted or machined bore/OD; no plating or anodising is used, and a protective Cr2O3/SiO2 scale is grown in service, so avoid chloride-bearing marking inks and grinding contamination from carbon steel.
Can 1.4849-SC be formed, bent or molded?
Not cold formable — shape is fixed by centrifugal or static casting; keep uniform wall, generous fillets and a machining allowance on the bore for the columnar-grain layer.
What is the maximum service temperature of 1.4849-SC?
1.4849-SC is rated for continuous use to about 1,050°C (1,922 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10295 — Heat resistant steel castings — CEN (2002)
- DIN 17465 — Heat resistant steel castings (superseded) — DIN (1989)
- ASM Handbook Vol.1 — Cast Heat-Resistant Steels (HK/HP/HT types) — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion in Reforming and Pyrolysis Furnaces — ASM International (2005)
- Centrifugally cast reformer/ethylene tube alloy datasheets (1.4849 / HT-Nb class) — Heat-resistant casting producers (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.