Stainless Steel 439 Annealed vs 439 TR-1/4H
Stainless Steel · 439 temper comparison
439 Annealed and 439 TR-1/4H are two conditions of the same stainless steel grade, 439: Annealed versus TR-1/4H (TR 1/4 Hard). The chemistry is identical, so every difference below comes from the condition. 439 TR-1/4H is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 310 MPa (45 ksi) for 439 Annealed, about 55% more; tensile strength follows at 580 MPa (84.1 ksi) vs 485 MPa (70.3 ksi). In exchange, 439 Annealed is the more ductile: elongation 30% versus 15% for 439 TR-1/4H, and 439 TR-1/4H is harder (185 HB vs 150 HB).
439 AnnealedChoose it when the part is bent, formed or impact-loaded.
439 TR-1/4HChoose it when strength drives the design.
439 Annealed vs 439 TR-1/4H: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all stainless steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Fracture Toughness (K_IC) 80 MPa·√m72.8 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.7 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 24 W/m·K13.9 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.4 µm/m·K5.8 µin/in·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · Max Service Temperature (continuous) 815°C1,499 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 70 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 50 MJ/kg21,496 BTU/lb · Embodied Carbon (primary production) 3.4 kg CO₂/kg · Embodied Water 90 L/kg10.8 gal/lb · Typical Recycled Content 65%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
439 Annealed vs 439 TR-1/4H — frequently asked
Is 439 TR-1/4H stronger than 439 Annealed?
Yes. 439 TR-1/4H has a typical yield strength of 480 MPa (69.6 ksi) against 310 MPa (45 ksi) for 439 Annealed — about 55% more. Tensile strength is 580 MPa (84.1 ksi) vs 485 MPa (70.3 ksi).
Which condition does FabDigit quote by default, Annealed or TR-1/4H?
Annealed is the default 439 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose 439 Annealed over 439 TR-1/4H?
Pick 439 Annealed when the part is bent, formed or impact-loaded. Pick 439 TR-1/4H when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 439 Annealed and 439 TR-1/4H side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.