Steel 09G2S-CD vs 09G2S TMCP
Steel · 09G2S temper comparison
09G2S-CD and 09G2S TMCP are two conditions of the same steel grade, 09G2S: CD (cold drawn) versus TMCP (thermomechanically controlled processed). The chemistry is identical, so every difference below comes from the condition. 09G2S-CD is the stronger of the two: yield strength 490 MPa (71.1 ksi) against 400 MPa (58 ksi) for 09G2S TMCP, about 23% more; tensile strength follows at 590 MPa (85.6 ksi) vs 540 MPa (78.3 ksi). In exchange, 09G2S TMCP is the more ductile: elongation 24% versus 12% for 09G2S-CD, and 09G2S-CD is harder (185 HB vs 165 HB). 09G2S TMCP runs hotter in service (400°C vs 350°C continuous).
09G2S-CDChoose it when strength drives the design.
09G2S TMCPChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
09G2S-CD vs 09G2S TMCP: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all 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 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 206 GPa29.9 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.28
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,500°C2,732 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -70°C-94 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 8 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 13 / 100
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 30 / 100 · Brazeability / Solderability 60 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 27 MJ/kg11,608 BTU/lb · Embodied Carbon (primary production) 2.2 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
09G2S-CD vs 09G2S TMCP — frequently asked
Is 09G2S-CD stronger than 09G2S TMCP?
Yes. 09G2S-CD has a typical yield strength of 490 MPa (71.1 ksi) against 400 MPa (58 ksi) for 09G2S TMCP — about 23% more. Tensile strength is 590 MPa (85.6 ksi) vs 540 MPa (78.3 ksi).
Which condition does FabDigit quote by default, CD or TMCP?
HR is the default 09G2S condition in the FabDigit quote flow (neither CD nor TMCP). 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, 09G2S-CD or 09G2S TMCP?
09G2S-CD, by a small margin. Both rate good for machinability — 66/100 against 58/100 for 09G2S TMCP; for welding the order is 09G2S TMCP first (excellent, 92/100) then 09G2S-CD (excellent, 85/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 09G2S-CD and 09G2S TMCP 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.