Stainless Steel 1.4958-CD vs 1.4958 HR-A
Stainless Steel · 1.4958 temper comparison
1.4958-CD and 1.4958 HR-A are two conditions of the same stainless steel grade, 1.4958: CD (cold drawn) versus HR-A (hot rolled plate, solution annealed and pickled). The chemistry is identical, so every difference below comes from the condition. 1.4958-CD is the stronger of the two: yield strength 400 MPa (58 ksi) against 240 MPa (34.8 ksi) for 1.4958 HR-A, about 67% more; tensile strength follows at 620 MPa (89.9 ksi) vs 540 MPa (78.3 ksi). In exchange, 1.4958 HR-A is the more ductile: elongation 42% versus 30% for 1.4958-CD, and 1.4958-CD is harder (190 HB vs 150 HB). 1.4958 HR-A runs hotter in service (1,100°C vs 550°C continuous).
1.4958-CDChoose it when strength drives the design.
1.4958 HR-AChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4958-CD vs 1.4958 HR-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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 196 GPa28.4 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 200 GPa29 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 7.94 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,357°C2,475 °F · Liquidus Temperature 1,385°C2,525 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 11.5 W/m·K6.6 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.4 µm/m·K8 µin/in·°F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 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 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 90 MJ/kg38,693 BTU/lb · Embodied Carbon (primary production) 6.8 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 40%
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.
1.4958-CD vs 1.4958 HR-A — frequently asked
Is 1.4958-CD stronger than 1.4958 HR-A?
Yes. 1.4958-CD has a typical yield strength of 400 MPa (58 ksi) against 240 MPa (34.8 ksi) for 1.4958 HR-A — about 67% more. Tensile strength is 620 MPa (89.9 ksi) vs 540 MPa (78.3 ksi).
Which condition does FabDigit quote by default, CD or HR-A?
SA is the default 1.4958 condition in the FabDigit quote flow (neither CD nor HR-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 is easier to machine, 1.4958-CD or 1.4958 HR-A?
1.4958-CD. Its machinability rates fair (35/100) against poor (29/100) for 1.4958 HR-A; for welding the order is 1.4958 HR-A first (very good, 78/100) then 1.4958-CD (very good, 70/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4958-CD and 1.4958 HR-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.