Copper Alloy C61900-AW vs C61900-M20
Copper Alloy · C61900 temper comparison
C61900-AW and C61900-M20 are two conditions of the same copper alloy grade, C61900: AW (as-welded deposit) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C61900-M20 is the stronger of the two: yield strength 310 MPa (45 ksi) against 250 MPa (36.3 ksi) for C61900-AW, about 24% more; tensile strength follows at 630 MPa (91.4 ksi) vs 585 MPa (84.8 ksi). C61900-M20 is the more ductile: elongation 25% versus 20% for C61900-AW, and C61900-M20 is harder (170 HB vs 150 HB).
C61900-M20Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
C61900-AW vs C61900-M20: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all copper alloy 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 copper alloy 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.
Elastic (Young's) Modulus
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: Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 7.58 g/cm³0.27 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,050°C1,922 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 220 J/g94.6 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -200°C-328 °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) -0.31 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 65 / 100 · Brazeability / Solderability 30 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 3.9 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every copper alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
C61900-AW vs C61900-M20 — frequently asked
Is C61900-M20 stronger than C61900-AW?
Yes. C61900-M20 has a typical yield strength of 310 MPa (45 ksi) against 250 MPa (36.3 ksi) for C61900-AW — about 24% more. Tensile strength is 630 MPa (91.4 ksi) vs 585 MPa (84.8 ksi).
Which condition does FabDigit quote by default, AW or M20?
M20 is the default C61900 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.
Which is easier to machine, C61900-AW or C61900-M20?
C61900-M20, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for C61900-AW; for welding the order is C61900-AW first (very good, 80/100) then C61900-M20 (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C61900-AW and C61900-M20 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.