Stainless Steel 1.4436 HR-AT
Finish state
EN 1.4436
HR-AT = hot Rolled + Solution Annealed + Pickled plate
Heavy plate route (>6 mm) — same metallurgy as 2B sheet but slightly lower guaranteed strength and rougher surface.
Values for the HR-AT condition
Other 1.4436 tempers and conditions
1.4436 is listed in 8 conditions; see the grade overview at 1.4436.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HR-ATThis page Hot Rolled + Solution Annealed + Pickled plate | Heavy plate route (>6 mm) — same metallurgy as 2B sheet but slightly lower guaranteed strength and rougher surface. | 260 | 580 | 50 | 150 HB | 2.3 % IACS |
ATDefault Solution Annealed | Standard stocked condition: 1030–1100 °C solution anneal + rapid quench, maximum corrosion resistance and formability. | 270 | 590 | 50 | 150 HB | — |
As-welded deposit | Property set for weld metal / HAZ of a joint made with ER316L-type filler, before any post-weld solution anneal. | 350 | 560 | 35 | 175 HB | 2.3 % IACS |
Cold worked, Rm ≥ 700 MPa | Light cold work (≈1/4 hard) for bar/wire where a moderate strength increase is needed with useful ductility. | 400 | 750 | 25 | 20 HRC | 2.3 % IACS |
Cold drawn | Cold-drawn round/hex bar for machined parts and fasteners — higher yield and better surface than hot-rolled bar. | 500 | 700 | 25 | 20 HRC | 2.3 % IACS |
Cold worked, Rm ≥ 800 MPa | ≈1/2 hard bar and wire for shafts, springs and fasteners needing higher proof strength. | 560 | 850 | 15 | 26 HRC | 2.3 % IACS |
Cold worked, Rm ≥ 900 MPa | ≈3/4 hard strip/wire where strength matters more than bendability. | 650 | 950 | 11 | 30 HRC | 2.3 % IACS |
C1000 / Full Hard | Full-hard strip and spring wire — maximum strength, minimum ductility, only simple flat or coiled parts. | 800 | 1,100 | 8 | 35 HRC | 2.3 % IACS |
What is 1.4436 HR-AT?
1.4436 HR-AT is 1.4436 supplied in the HR-AT condition — heavy plate route (>6 mm) — same metallurgy as 2B sheet but slightly lower guaranteed strength and rougher surface. 1.4436 HR-AT has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 200 GPa (29 Msi). 1.4436 HR-AT has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F). AT is the default condition FabDigit quotes; HR-AT is available on request or by drawing note.
Advantages
- Forms and bends easily — 85/100, better than 95% of stainless steel grades
- Ductile — tolerates forming and impact — 50%, better than 90% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- High service temperature — 870°C (1,598 °F), better than 83% of stainless steel grades
- Readily welded — 80/100, better than 80% of stainless steel grades
Limitations
- Low strength — 260 MPa (37.7 ksi), worse than 84% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
- High embodied carbon — 5.5 kg CO₂/kg, worse than 77% of stainless steel grades
1.4436 HR-AT properties
Typical room-temperature values for 1.4436 HR-AT; 23 are specific to this condition. Other listed values are 1.4436 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4436 HR-AT has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical16
1.4436 HR-AT has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4436 HR-AT is rated for continuous service to 870°C (1,598 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4436 HR-AT conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 73% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4436 HR-AT takes about 57 MJ of energy and emits 5.5 kg of CO₂ — more than 62% of stainless steel grades. Typical recycled content is 65%.
Manufacturability8
1.4436 HR-AT's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (80/100); formability excellent (85/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4436 HR-AT
Is 1.4436 easy to machine?
Gummy and work-hardening: use rigid setups, sharp positive-rake carbide, heavy positive feed, ~60–120 m/min cutting speed and flood coolant; never dwell or rub.
Can 1.4436 be welded?
Readily welded by TIG/MIG/SMAW/laser with ER316L or 318 filler, low heat input and interpass <150 °C; back-purge for corrosion service and pickle/passivate afterwards, PWHT normally not required for thin sections.
Can 1.4436 be formed, bent or molded?
Excellent deep-drawing and bending in the annealed state, but high work-hardening rate demands ~50% more press force than carbon steel, generous bend radii and interstage annealing for severe draws.
What surface finishes work on 1.4436?
Not anodisable; specify pickling + passivation (ASTM A967) or electropolishing for hygienic service, and mechanical/BA polishing up to No.8 mirror finish for decorative work.
1.4436 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 |
|---|---|---|
| Cstandard carbon, not an 'L' grade | ≤ 0.05 | 0.03 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2 | 1.5 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.02 | 0.01 |
| Cr | 16.5 – 18.5 | 17.5 |
| Nihigher Ni than 1.4401 for austenite stability | 10.5 – 13 | 12 |
| Monarrower, higher Mo band than 316 | 2.5 – 3 | 2.7 |
| N | ≤ 0.11 | 0.05 |
| Fe | balance | — |
1.4436 HR-AT — frequently asked
What is 1.4436 HR-AT used for?
1.4436 HR-AT is typically used for marine fittings, chemical processing, pump/valve components and food equipment. In short: higher-Mo standard 316; stronger than 316L; broad stock availability.
What is the yield strength of 1.4436 HR-AT?
1.4436 HR-AT has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 84% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is 1.4436 HR-AT easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Gummy and work-hardening: use rigid setups, sharp positive-rake carbide, heavy positive feed, ~60–120 m/min cutting speed and flood coolant; never dwell or rub.
Can 1.4436 HR-AT be welded?
Yes — weldability is rated very good (80/100). Readily welded by TIG/MIG/SMAW/laser with ER316L or 318 filler, low heat input and interpass <150 °C; back-purge for corrosion service and pickle/passivate afterwards, PWHT normally not required for thin sections.
What surface finishes work on 1.4436 HR-AT?
Not anodisable; specify pickling + passivation (ASTM A967) or electropolishing for hygienic service, and mechanical/BA polishing up to No.8 mirror finish for decorative work.
Can 1.4436 HR-AT be formed, bent or molded?
Excellent deep-drawing and bending in the annealed state, but high work-hardening rate demands ~50% more press force than carbon steel, generous bend radii and interstage annealing for severe draws.
What is the maximum service temperature of 1.4436 HR-AT?
1.4436 HR-AT is rated for continuous use to about 870°C (1,598 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4436-AT and 1.4436-C1000?
AT is the default condition — standard stocked condition: 1030–1100 °C solution anneal + rapid quench, maximum corrosion resistance and formability. C1000: full-hard strip and spring wire — maximum strength, minimum ductility, only simple flat or coiled parts. Yield strength is 270 MPa in AT versus 800 MPa in C1000.
Sources
- EN 10088-1/-2/-3 Stainless steels — list, sheet/plate and bar — CEN (2014)
- ASTM A240/A276 (S31600 equivalent) — ASTM International (2023)
- GB/T 20878 / GB/T 4237 (06Cr17Ni12Mo2) — SAC (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Outokumpu Corrosion Handbook / Stainless Steel Handbook — Outokumpu (2020)
- Sandvik/Alleima and Aperam datasheets for 1.4436 / 316 — Alleima, Aperam (2023)
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.