Steel 4J32-CD vs 4J32 M+ST
Steel · 4J32 temper comparison
4J32-CD and 4J32 M+ST are two conditions of the same steel grade, 4J32: CD (cold drawn) versus M+ST (annealed plus dimensional stabilization). The chemistry is identical, so every difference below comes from the condition. 4J32-CD is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 300 MPa (43.5 ksi) for 4J32 M+ST, about 50% more; tensile strength follows at 620 MPa (89.9 ksi) vs 500 MPa (72.5 ksi). In exchange, 4J32 M+ST is the more ductile: elongation 33% versus 20% for 4J32-CD, and 4J32-CD is harder (190 HB vs 150 HB). 4J32 M+ST runs hotter in service (200°C vs 150°C continuous). On the shop floor, 4J32 M+ST welds better (very good vs good).
4J32-CDChoose it when strength drives the design.
4J32 M+STChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
4J32-CD vs 4J32 M+ST: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 56 GPa8.1 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.15 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 11 W/m·K6.4 BTU/hr·ft·°F · Specific Heat Capacity 515 J/kg·K0.12 BTU/lb·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.5 V · Corrosion Resistance 28 / 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 40 / 100 · Brazeability / Solderability 70 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 115 MJ/kg49,441 BTU/lb · Embodied Carbon (primary production) 8.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 25%
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.
4J32-CD vs 4J32 M+ST — frequently asked
Is 4J32-CD stronger than 4J32 M+ST?
Yes. 4J32-CD has a typical yield strength of 450 MPa (65.3 ksi) against 300 MPa (43.5 ksi) for 4J32 M+ST — about 50% more. Tensile strength is 620 MPa (89.9 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, CD or M+ST?
M is the default 4J32 condition in the FabDigit quote flow (neither CD nor M+ST). 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, 4J32-CD or 4J32 M+ST?
4J32-CD. Its machinability rates fair (38/100) against poor (30/100) for 4J32 M+ST; for welding the order is 4J32 M+ST first (very good, 70/100) then 4J32-CD (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 4J32-CD and 4J32 M+ST 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.