Stainless Steel S46800 Annealed BA
Finish state
UNS S46800
Choose when a reflective as-annealed surface is needed without mechanical polishing (appliance, hot-water tank liners).
Values for the Annealed BA condition
Other S46800 tempers and conditions
S46800 is listed in 4 conditions; see the grade overview at S46800.
- Annealed BA
- Annealed
- Annealed 2B
- Temper Rolled 1/4H
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed BAThis page Bright annealed sheet/strip (BA) | Choose when a reflective as-annealed surface is needed without mechanical polishing (appliance, hot-water tank liners). | 305 | 475 | 32 | 156 HB | 2.9 % IACS |
AnnealedDefault mill annealed (ASTM A240 / A176 base condition) | Standard stocked condition for sheet, strip and plate; maximum ductility and corrosion resistance, use for forming and welding. | 310 | 480 | 32 | 160 HB | 2.9 % IACS |
Annealed, cold rolled 2B finish sheet | Most common cold-rolled sheet/coil finish — smooth, mildly reflective, ready for forming and welding. | 320 | 490 | 31 | 163 HB | 2.9 % IACS |
Temper rolled / cold worked ~1/4 hard strip | Light skin-pass or cold reduction for higher yield strength and better flatness/springback control in roll-formed tube and trim. | 450 | 560 | 18 | 13 HRC | 2.9 % IACS |
What is S46800 Annealed BA?
S46800 Annealed BA is S46800 supplied in the Annealed BA condition — choose when a reflective as-annealed surface is needed without mechanical polishing (appliance, hot-water tank liners). S46800 Annealed BA has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 475 MPa (68.9 ksi) — weaker than 66% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi). S46800 Annealed BA has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F). Annealed is the default condition FabDigit quotes; Annealed BA is available on request or by drawing note.
Advantages
- Easy to machine — 55/100, better than 94% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Forms and bends easily — 74/100, better than 86% of stainless steel grades
- High service temperature — 900°C (1,652 °F), better than 85% of stainless steel grades
S46800 Annealed BA properties
Typical room-temperature values for S46800 Annealed BA; 22 are specific to this condition. Other listed values are S46800 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S46800 Annealed BA has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical14
S46800 Annealed BA has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 475 MPa (68.9 ksi) — weaker than 66% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S46800 Annealed BA is rated for continuous service to 900°C (1,652 °F). It conducts heat at 24 W/m·K (13.9 BTU/hr·ft·°F), better than 81% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
S46800 Annealed BA conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 58% of stainless steel grades.
Sustainability4
Producing a kilogram of S46800 Annealed BA takes about 48 MJ of energy and emits 3.6 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
S46800 Annealed BA's machinability is good (55/100, better than 94% of stainless steel grades); weldability very good (80/100); formability very good (74/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S46800 Annealed BA
Is S46800 easy to machine?
Machines like Type 430/439 (~55% of AISI 1212): use rigid setups, sharp positive-rake carbide, generous feed to cut through the gummy work-hardened skin, and ample coolant.
Can S46800 be welded?
Excellent — Ti+Nb stabilization prevents chromium-carbide sensitization, so GTAW/GMAW/laser and high-speed resistance seam welding need no post-weld anneal; use matching or 409Cb/430Nb filler and keep heat input and interpass temperature low to limit grain growth.
Can S46800 be formed, bent or molded?
Good roll forming, bending and moderate deep drawing in the annealed condition; lower n-value than austenitics means less stretch, watch for ridging/roping on deep-drawn parts and allow for springback.
What surface finishes work on S46800?
Supplied 2B/BA/No.1; passivate per ASTM A967 or electropolish after fabrication, and remove all embedded iron — the grade takes paint and porcelain-type coatings well but cannot be anodized.
S46800 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 |
|---|---|---|
| C | ≤ 0.03 | 0.02 |
| Mn | ≤ 1 | 0.35 |
| Si | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.03 | 0 |
| Cr | 18 – 20 | 19 |
| Nimax, residual | ≤ 0.5 | 0.2 |
| N | ≤ 0.03 | 0.02 |
| Tipart of dual Ti+Nb stabilization | 0.1 – 0.6 | 0.2 |
| NbTi+Nb total 0.20 + 4(C+N) min, 0.80 max | 0.1 – 0.6 | 0.3 |
| Fe | balance | — |
S46800 Annealed BA — frequently asked
What is S46800 Annealed BA used for?
S46800 Annealed BA is typically used for automotive exhaust system components, corrosion-resistant fasteners, specialty process equipment, welded tubing and ducting, hot water tanks and vessels and heat exchanger components. In short: most formable stabilized ferritic; 900 °C service ceiling; low-nickel 400-series option.
What is the yield strength of S46800 Annealed BA?
S46800 Annealed BA has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 475 MPa (68.9 ksi) — weaker than 66% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S46800 Annealed BA easy to machine?
Reasonably — machinability is rated good (55/100, better than 94% of stainless steel grades). Machines like Type 430/439 (~55% of AISI 1212): use rigid setups, sharp positive-rake carbide, generous feed to cut through the gummy work-hardened skin, and ample coolant.
Can S46800 Annealed BA be welded?
Yes — weldability is rated very good (80/100). Excellent — Ti+Nb stabilization prevents chromium-carbide sensitization, so GTAW/GMAW/laser and high-speed resistance seam welding need no post-weld anneal; use matching or 409Cb/430Nb filler and keep heat input and interpass temperature low to limit grain growth.
What surface finishes work on S46800 Annealed BA?
Supplied 2B/BA/No.1; passivate per ASTM A967 or electropolish after fabrication, and remove all embedded iron — the grade takes paint and porcelain-type coatings well but cannot be anodized.
Can S46800 Annealed BA be formed, bent or molded?
Good roll forming, bending and moderate deep drawing in the annealed condition; lower n-value than austenitics means less stretch, watch for ridging/roping on deep-drawn parts and allow for springback.
What is the maximum service temperature of S46800 Annealed BA?
S46800 Annealed BA is rated for continuous use to about 900°C (1,652 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A176 — Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip — ASTM International (2022)
- ASTM A268 / A176 welded ferritic tubing requirements — ASTM International (2020)
- AL 468 (UNS S46800) dual-stabilized ferritic stainless technical data — ATI (Allegheny Technologies) (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- UNS Metals & Alloys in the Unified Numbering System (SAE HS-1086 / ASTM DS-56) — SAE/ASTM (2017)
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.