Stainless Steel Alloy 926-CD (Cold drawn)
Supply condition
UNS N08926 · ASTM A240/B625 · EN 1.4529, X1NiCrMoCuN25-20-7 · also Cronifer 1925hMo
Choose for shafts, fasteners, pump/valve trim and instrument tubing needing higher yield strength and tight tolerance; slightly reduced ductility.
Values for the CD condition
Other Alloy 926 tempers and conditions
Alloy 926 is listed in 3 conditions; see the grade overview at Alloy 926.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution annealed | Standard supply condition for plate, sheet, tube, pipe and fittings — maximum corrosion resistance and ductility; use unless cold-worked strength is needed. | 360 | 700 | 45 | 180 HB | — |
CDThis page Cold drawn | Choose for shafts, fasteners, pump/valve trim and instrument tubing needing higher yield strength and tight tolerance; slightly reduced ductility. | 620 | 850 | 25 | 26 HRC | — |
Heavily cold worked | Springs, screens, wire cloth and fasteners for aggressive chloride media where high strength plus 6Mo corrosion resistance is required. | 1,000 | 1,250 | 8 | 38 HRC | 1.7 % IACS |
What is Alloy 926-CD?
Alloy 926-CD is Alloy 926 supplied in the CD condition — choose for shafts, fasteners, pump/valve trim and instrument tubing needing higher yield strength and tight tolerance; slightly reduced ductility. Alloy 926-CD has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 88% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 195 GPa (28.3 Msi). Alloy 926-CD has a density of 8.1 g/cm³ (0.293 lb/in³), heavier than 99% of stainless steel grades. It melts at 1,320°C (2,408 °F). SA is the default condition FabDigit quotes; CD is available on request or by drawing note.
Advantages
- Good corrosion resistance — 86/100, better than 94% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- High strength — 620 MPa (89.9 ksi), better than 88% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
Limitations
- Poor heat conductor — 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- High embodied carbon — 6.5 kg CO₂/kg, worse than 93% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
Alloy 926-CD properties
Typical room-temperature values for Alloy 926-CD; 11 are specific to this condition. Other listed values are Alloy 926 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
Alloy 926-CD has a density of 8.1 g/cm³ (0.293 lb/in³), heavier than 99% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Mechanical15
Alloy 926-CD has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 88% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal5
Alloy 926-CD is rated for continuous service to 400°C (752 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades. Thermal expansion is 15.8 µm/m·K (8.78 µin/in·°F).
Electrical3
Alloy 926-CD conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 94% of stainless steel grades.
Sustainability4
Producing a kilogram of Alloy 926-CD takes about 95 MJ of energy and emits 6.5 kg of CO₂ — more than 96% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
Alloy 926-CD's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (75/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Alloy 926-CD
Is Alloy 926 easy to machine?
Gummy and highly work-hardening: use rigid setups, sharp positive-rake carbide, 25–40 % of 316L cutting speeds, heavy feeds to stay under the hardened skin, and flood high-lubricity coolant.
Can Alloy 926 be welded?
GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4, ERNiCrMo-13) to prevent Mo segregation in the weld; no preheat, keep interpass below ~150 °C, low heat input, argon backing, no post-weld heat treatment.
Can Alloy 926 be formed, bent or molded?
Cold forms well but needs roughly twice the press force of 316L and generous springback allowance; hot work 1150–1200 °C with immediate solution anneal at 1100–1180 °C and rapid quench.
What surface finishes work on Alloy 926?
Pickle (HNO3-HF) and passivate per ASTM A967 after welding or heat tint to restore full pitting resistance; polishes to a bright finish; not anodised, and iron contamination from carbon-steel tooling must be avoided.
Alloy 926 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 |
|---|---|---|
| Clow carbon for as-welded corrosion resistance | ≤ 0.02 | 0.01 |
| Si | ≤ 0.5 | 0.3 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.03 | — |
| S | ≤ 0.01 | — |
| Cr | 19 – 21 | 20 |
| Niaustenite stability, SCC resistance | 24 – 26 | 25 |
| Mopitting/crevice resistance | 6 – 7 | 6.5 |
| Cuimproves sulphuric/phosphoric acid resistance | 0.5 – 1.5 | 1 |
| Nraises yield strength and PREN | 0.15 – 0.25 | 0.2 |
| Feremainder, ≈ 46 % | balance | — |
Alloy 926-CD — frequently asked
What is Alloy 926-CD used for?
Alloy 926-CD is typically used for FGD scrubber systems, seawater and offshore equipment, pulp/paper bleach plants and sour gas and chemical processing. In short: 6.5 % Mo superaustenitic; upgrade from 904L; near nickel-alloy corrosion resistance.
What is the yield strength of Alloy 926-CD?
Alloy 926-CD has a typical yield strength of 620 MPa (89.9 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 88% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is Alloy 926-CD easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Gummy and highly work-hardening: use rigid setups, sharp positive-rake carbide, 25–40 % of 316L cutting speeds, heavy feeds to stay under the hardened skin, and flood high-lubricity coolant.
Can Alloy 926-CD be welded?
Yes — weldability is rated very good (75/100). GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4, ERNiCrMo-13) to prevent Mo segregation in the weld; no preheat, keep interpass below ~150 °C, low heat input, argon backing, no post-weld heat treatment.
What surface finishes work on Alloy 926-CD?
Pickle (HNO3-HF) and passivate per ASTM A967 after welding or heat tint to restore full pitting resistance; polishes to a bright finish; not anodised, and iron contamination from carbon-steel tooling must be avoided.
Can Alloy 926-CD be formed, bent or molded?
Cold forms well but needs roughly twice the press force of 316L and generous springback allowance; hot work 1150–1200 °C with immediate solution anneal at 1100–1180 °C and rapid quench.
What is the maximum service temperature of Alloy 926-CD?
Alloy 926-CD is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Alloy 926-SA and Alloy 926 CW-HT?
SA is the default condition — standard supply condition for plate, sheet, tube, pipe and fittings — maximum corrosion resistance and ductility; use unless cold-worked strength is needed. CW-HT: springs, screens, wire cloth and fasteners for aggressive chloride media where high strength plus 6Mo corrosion resistance is required. Yield strength is 360 MPa in SA versus 1,000 MPa in CW-HT.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip — ASTM International (2023)
- ASTM B625 — UNS N08926 and Related Alloys Plate, Sheet and Strip — ASTM International (2022)
- ASTM B649 / B676 / B677 — N08926 bar, tube and pipe — ASTM International (2022)
- EN 10088-1/-2 — Stainless steels, grade 1.4529 X1NiCrMoCuN25-20-7 — CEN (2014)
- Cronifer 1925 hMo / Alloy 926 (N08926) alloy data sheet — VDM Metals / ThyssenKrupp VDM (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
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.