Stainless Steel N08031-CD (Cold drawn)
Supply condition
UNS N08031 · EN 1.4562, X1NiCrMoCu32-28-7
Cold drawn bar for fasteners, shafts and machined valve parts where higher yield strength and close tolerance are needed.
Values for the CD condition
Other N08031 tempers and conditions
N08031 is listed in 7 conditions; see the grade overview at N08031.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
hot rolled, solution annealed and pickled plate | Heavy plate for vessels, tube sheets and FGD equipment; lowest strength, highest ductility of the annealed forms. | 340 | 690 | 55 | 175 HB | 1.7 % IACS |
Forged + SA | Forgings and heavy fittings per ASTM B564-type practice, solution annealed after hot working to dissolve intermetallics. | 340 | 690 | 50 | 180 HB | 1.7 % IACS |
SADefault Solution annealed | Standard supply condition for all product forms; maximum corrosion resistance and ductility. | 360 | 700 | 50 | 180 HB | — |
cold rolled, bright/2B annealed sheet & strip | Thin sheet and strip for linings, plate heat exchangers and formed parts requiring a smooth surface. | 380 | 720 | 48 | 185 HB | 1.7 % IACS |
As-welded deposit | Property set for as-welded fabrication using over-alloyed filler (e.g. ERNiCrMo-3/-4 or matching 31 filler); no post-weld heat treatment normally applied. | 380 | 680 | 35 | 195 HB | 1.6 % IACS |
CDThis page Cold drawn | Cold drawn bar for fasteners, shafts and machined valve parts where higher yield strength and close tolerance are needed. | 550 | 800 | 30 | 20 HRC | 1.7 % IACS |
Cold worked | Cold-pilgered or cold-drawn tubing supplied without final anneal where higher pressure rating is required; corrosion performance is best restored by a final solution anneal. | 620 | 850 | 25 | 24 HRC | 1.7 % IACS |
What is N08031-CD?
N08031-CD is N08031 supplied in the CD condition — cold drawn bar for fasteners, shafts and machined valve parts where higher yield strength and close tolerance are needed. N08031-CD has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 83% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 195 GPa (28.3 Msi). N08031-CD has a density of 8.02 g/cm³ (0.29 lb/in³), heavier than 97% 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 — 90/100, better than 99% of stainless steel grades
- High strength — 550 MPa (79.8 ksi), better than 83% of stainless steel grades
Limitations
- Poor heat conductor — 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 99% of stainless steel grades
- High embodied carbon — 8 kg CO₂/kg, worse than 99% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Difficult to machine — 24/100, worse than 93% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
N08031-CD properties
Typical room-temperature values for N08031-CD; 24 are specific to this condition. Other listed values are N08031 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
N08031-CD has a density of 8.02 g/cm³ (0.29 lb/in³), heavier than 97% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Mechanical14
N08031-CD has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 83% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
N08031-CD is rated for continuous service to 400°C (752 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 99% of stainless steel grades. Thermal expansion is 14.5 µm/m·K (8.06 µin/in·°F).
Electrical3
N08031-CD conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), better than 99% of stainless steel grades.
Sustainability4
Producing a kilogram of N08031-CD takes about 100 MJ of energy and emits 8 kg of CO₂ — more than 98% of stainless steel grades. Typical recycled content is 35%.
Manufacturability7
N08031-CD's machinability is poor (24/100, worse than 93% of stainless steel grades); weldability good (65/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with N08031-CD
Is N08031 easy to machine?
Machine like a nickel alloy: rigid setup, positive-rake carbide, heavy constant feed to cut under the work-hardened layer, low speed (~15–25 m/min) with flood coolant.
Can N08031 be welded?
GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4 or matching alloy 31 filler), low heat input, interpass < 150 °C, no preheat or PWHT; avoid autogenous welding.
Can N08031 be formed, bent or molded?
Excellent cold ductility but ~2× the forming load of 304; hot working 1150–1000 °C followed by mandatory solution anneal and quench.
What surface finishes work on N08031?
Pickle (HNO3-HF) or bead-blast plus passivation after fabrication to remove heat tint; electropolishing gives best performance in acid service; never anodized or plated.
N08031 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 intergranular corrosion resistance | ≤ 0.02 | 0.01 |
| Si | ≤ 0.3 | 0.15 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.02 | 0.02 |
| S | ≤ 0.01 | 0 |
| Cr | 26 – 28 | 27 |
| Ni | 30 – 32 | 31 |
| Mo | 6 – 7 | 6.5 |
| Cukey for hot sulfuric/phosphoric acid resistance | 1 – 1.4 | 1.2 |
| Nraises PREN and strength | 0.15 – 0.25 | 0.2 |
| Febalance, approx. 31–33% | balance | — |
N08031-CD — frequently asked
What is N08031-CD used for?
N08031-CD is typically used for sulfuric acid production, flue gas desulfurization systems, phosphoric acid plants, pulp and paper bleaching equipment and chemical process piping. In short: copper-bearing acid superaustenitic; beyond 6% Mo grades; top corrosion score, poor machinability.
What is the yield strength of N08031-CD?
N08031-CD has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 83% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is N08031-CD easy to machine?
Not especially — machinability is rated poor (24/100, worse than 93% of stainless steel grades). Machine like a nickel alloy: rigid setup, positive-rake carbide, heavy constant feed to cut under the work-hardened layer, low speed (~15–25 m/min) with flood coolant.
Can N08031-CD be welded?
Yes — weldability is rated good (65/100). GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4 or matching alloy 31 filler), low heat input, interpass < 150 °C, no preheat or PWHT; avoid autogenous welding.
What surface finishes work on N08031-CD?
Pickle (HNO3-HF) or bead-blast plus passivation after fabrication to remove heat tint; electropolishing gives best performance in acid service; never anodized or plated.
Can N08031-CD be formed, bent or molded?
Excellent cold ductility but ~2× the forming load of 304; hot working 1150–1000 °C followed by mandatory solution anneal and quench.
What is the maximum service temperature of N08031-CD?
N08031-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 N08031-SA and N08031-CW?
SA is the default condition — standard supply condition for all product forms; maximum corrosion resistance and ductility. CW: cold-pilgered or cold-drawn tubing supplied without final anneal where higher pressure rating is required; corrosion performance is best restored by a final solution anneal. Yield strength is 360 MPa in SA versus 620 MPa in CW.
Sources
- ASTM B625 — Ni-Fe-Cr-Mo-Cu Alloy Plate, Sheet and Strip (UNS N08031) — ASTM International (2021)
- ASTM B622 / B649 — Seamless Pipe & Tube, Bar and Wire for UNS N08031 — ASTM International (2020)
- EN 10088-2 / 10028-7 — Stainless steel 1.4562 (X1NiCrMoCu32-28-7) — CEN (2014)
- Nicrofer 3127 hMo — Alloy 31 material data sheet — VDM Metals (2020)
- ASM Handbook Vol. 13B — Corrosion: Materials (superaustenitic stainless steels) — 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.