Stainless Steel 1.4000 +C vs 1.4000 +SR
Stainless Steel · 1.4000 temper comparison
1.4000 +C and 1.4000 +SR are two conditions of the same stainless steel grade, 1.4000: +C (cold drawn) versus +SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. 1.4000 +C is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 470 MPa (68.2 ksi) for 1.4000 +SR, about 11% more; tensile strength follows at 660 MPa (95.7 ksi) vs 620 MPa (89.9 ksi). In exchange, 1.4000 +SR is the more ductile: elongation 17% versus 14% for 1.4000 +C, and 1.4000 +C is harder (195 HB vs 185 HB). 1.4000 +SR runs hotter in service (450°C vs 400°C continuous).
1.4000 +CChoose it when strength drives the design.
1.4000 +SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4000 +C vs 1.4000 +SR: 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 220 GPa31.9 Msi · Shear Modulus 84 GPa12.2 Msi · Bulk Modulus 162 GPa23.5 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.7 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,480°C2,696 °F · Liquidus Temperature 1,530°C2,786 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 30 W/m·K17.3 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.5 µm/m·K5.8 µin/in·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · Min Service Temperature -20°C-4 °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) -0.3 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: Castability 45 / 100 · Brazeability / Solderability 60 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 38 MJ/kg16,337 BTU/lb · Embodied Carbon (primary production) 2.9 kg CO₂/kg · Embodied Water 100 L/kg12 gal/lb · Typical Recycled Content 60%
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.
1.4000 +C vs 1.4000 +SR — frequently asked
Is 1.4000 +C stronger than 1.4000 +SR?
Yes. 1.4000 +C has a typical yield strength of 520 MPa (75.4 ksi) against 470 MPa (68.2 ksi) for 1.4000 +SR — about 11% more. Tensile strength is 660 MPa (95.7 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, +C or +SR?
+A is the default 1.4000 condition in the FabDigit quote flow (neither +C nor +SR). 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 1.4000 +C over 1.4000 +SR?
Pick 1.4000 +C when strength drives the design. Pick 1.4000 +SR when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4000 +C and 1.4000 +SR 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.