Stainless Steel 1.4988-HR vs 1.4988 SA+A
Stainless Steel · 1.4988 temper comparison
1.4988-HR and 1.4988 SA+A are two conditions of the same stainless steel grade, 1.4988: HR (hot rolled) versus SA+A (solution annealed and precipitation aged / stabilised ~700–800 °C). The chemistry is identical, so every difference below comes from the condition. 1.4988 SA+A is the stronger of the two: yield strength 400 MPa (58 ksi) against 320 MPa (46.4 ksi) for 1.4988-HR, about 25% more; tensile strength follows at 720 MPa (104 ksi) vs 680 MPa (98.6 ksi). In exchange, 1.4988-HR is the more ductile: elongation 35% versus 28% for 1.4988 SA+A, and 1.4988 SA+A is harder (215 HB vs 195 HB). On the shop floor, 1.4988-HR welds better (good vs fair).
1.4988-HRChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
1.4988 SA+AChoose it when strength drives the design.
1.4988-HR vs 1.4988 SA+A: 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)
Fracture Toughness (K_IC)
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
Physical
Density and transition temperatures.
Same in both: Density 7.9 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,370°C2,498 °F · Liquidus Temperature 1,420°C2,588 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 15 W/m·K8.7 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16 µm/m·K8.9 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 2.2 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Brazeability / Solderability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 56 MJ/kg24,076 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 55%
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.
1.4988-HR vs 1.4988 SA+A — frequently asked
Is 1.4988 SA+A stronger than 1.4988-HR?
Yes. 1.4988 SA+A has a typical yield strength of 400 MPa (58 ksi) against 320 MPa (46.4 ksi) for 1.4988-HR — about 25% more. Tensile strength is 720 MPa (104 ksi) vs 680 MPa (98.6 ksi).
Which condition does FabDigit quote by default, HR or SA+A?
SA is the default 1.4988 condition in the FabDigit quote flow (neither HR nor SA+A). 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.
Which welds better, 1.4988-HR or 1.4988 SA+A?
1.4988-HR. Its weldability rates good (55/100) against fair (45/100) for 1.4988 SA+A.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4988-HR and 1.4988 SA+A 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.