Stainless Steel CC50 AS-CAST
Heat-treated state
UNS J92615 · ASTM A743 Grade CC50
Lowest-cost condition for non-critical corrosion or abrasion parts where maximum hardness matters more than toughness.
Values for the AS-CAST condition
Other CC50 tempers and conditions
CC50 is listed in 3 conditions; see the grade overview at CC50.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault 1040–1095 °C, air or furnace cool per ASTM A743 | Standard supply condition for corrosion service: homogenizes chromium, restores passivity and gives the best available ductility. | 275 | 480 | 10 | 210 HB | — |
CC50 with 2.0–4.0 % Ni and ≤0.15 % N | Choose when the specification calls for the 450 MPa / 205 MPa mechanical class and somewhat better ductility than the low-nickel chemistry. | 290 | 510 | 14 | 215 HB | 2.2 % IACS |
AS-CASTThis page no post-solidification heat treatment | Lowest-cost condition for non-critical corrosion or abrasion parts where maximum hardness matters more than toughness. | 310 | 500 | 5 | 19 HRC | 2.3 % IACS |
What is CC50 AS-CAST?
CC50 AS-CAST is CC50 heat treated to AS-CAST — lowest-cost condition for non-critical corrosion or abrasion parts where maximum hardness matters more than toughness. CC50 AS-CAST has a yield strength of 310 MPa (45 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 63% of stainless steel grades. Elongation at break is 5% and the elastic modulus is 200 GPa (29 Msi). CC50 AS-CAST has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,370°C (2,498 °F). Annealed is the default condition FabDigit quotes; AS-CAST is available on request or by drawing note.
Advantages
- High service temperature — 1,090°C (1,994 °F), better than 93% of stainless steel grades
- Conducts heat well — 20.5 W/m·K (11.8 BTU/hr·ft·°F), better than 75% of stainless steel grades
Limitations
- Limited ductility — 5%, worse than 100% of stainless steel grades
- Low fracture toughness — 30 MPa·√m (27.3 ksi·√in), worse than 99% of stainless steel grades
- Limited formability — 6/100, worse than 97% of stainless steel grades
- Difficult to weld — 25/100, worse than 92% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
CC50 AS-CAST properties
Typical room-temperature values for CC50 AS-CAST; 23 are specific to this condition. Other listed values are CC50 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
CC50 AS-CAST has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical16
CC50 AS-CAST has a yield strength of 310 MPa (45 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 63% of stainless steel grades. Elongation at break is 5% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
CC50 AS-CAST is rated for continuous service to 1,090°C (1,994 °F). It conducts heat at 20.5 W/m·K (11.8 BTU/hr·ft·°F), better than 75% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
CC50 AS-CAST conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of CC50 AS-CAST takes about 55 MJ of energy and emits 4.2 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
CC50 AS-CAST's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability poor (25/100); formability not recommended (6/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CC50 AS-CAST
Is CC50 easy to machine?
Machine with rigid setups, sharp carbide or ceramic tooling, low speed and heavy positive feed; the chromium carbides are abrasive and the alloy work-hardens quickly.
Can CC50 be welded?
Weldable with matching high-Cr or austenitic (E309/E312) filler using 200–260 °C preheat and low heat input, followed by a 1040–1095 °C anneal to restore HAZ ductility.
Can CC50 be formed, bent or molded?
A casting-only grade with good fluidity but high shrinkage — use generous risering and avoid sharp section changes; no cold forming.
What surface finishes work on CC50?
Passivate in nitric acid after machining; can be shot-blasted, ground and polished, though carbide phases limit true mirror finishes; no anodizing.
CC50 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 |
|---|---|---|
| C0.50 % max | ≤ 0.5 | 0.35 |
| Mn | ≤ 1 | 0.7 |
| Si | ≤ 1.5 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.04 | — |
| Cr | 26 – 30 | 28 |
| Ni4.0 % max; optional 2.0–4.0 % with N ≤0.15 % for the higher-strength class | ≤ 4 | 1.5 |
| Nonly specified for the 2.0–4.0 % Ni chemistry | ≤ 0.15 | — |
| Fe | balance | — |
CC50 AS-CAST — frequently asked
What is CC50 AS-CAST used for?
CC50 AS-CAST is typically used for valve and pump bodies, oxidizing acid service, corrosion-resistant castings and chemical processing hardware. In short: high-Cr ferritic casting alloy; oxidizing acid resistance; low ductility, hard to machine.
What is the yield strength of CC50 AS-CAST?
CC50 AS-CAST has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 63% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is CC50 AS-CAST easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machine with rigid setups, sharp carbide or ceramic tooling, low speed and heavy positive feed; the chromium carbides are abrasive and the alloy work-hardens quickly.
Can CC50 AS-CAST be welded?
Not readily — weldability is rated poor (25/100). Weldable with matching high-Cr or austenitic (E309/E312) filler using 200–260 °C preheat and low heat input, followed by a 1040–1095 °C anneal to restore HAZ ductility.
What surface finishes work on CC50 AS-CAST?
Passivate in nitric acid after machining; can be shot-blasted, ground and polished, though carbide phases limit true mirror finishes; no anodizing.
Can CC50 AS-CAST be formed, bent or molded?
A casting-only grade with good fluidity but high shrinkage — use generous risering and avoid sharp section changes; no cold forming.
What is the maximum service temperature of CC50 AS-CAST?
CC50 AS-CAST is rated for continuous use to about 1,090°C (1,994 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CC50 Annealed and CC50 AS-CAST?
Annealed is the default condition — standard supply condition for corrosion service: homogenizes chromium, restores passivity and gives the best available ductility. AS-CAST: lowest-cost condition for non-critical corrosion or abrasion parts where maximum hardness matters more than toughness. Yield strength is 275 MPa in Annealed versus 310 MPa in AS-CAST.
Sources
- ASTM A743/A743M — Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application — ASTM International (2019)
- ASTM A800/A800M — Steel Castings, Austenitic Alloy, Estimating Ferrite Content — ASTM International (2020)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America / ASM International (1995)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
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.