Steel 835M30 Annealed vs 835M30-Z
Steel · 835M30 temper comparison
835M30 Annealed and 835M30-Z are two conditions of the same steel grade, 835M30: Annealed versus Z (hardened and tempered, 1550 MPa minimum). The chemistry is identical, so every difference below comes from the condition. 835M30-Z is the stronger of the two: yield strength 1,400 MPa (203 ksi) against 560 MPa (81.2 ksi) for 835M30 Annealed, about 150% more; tensile strength follows at 1,620 MPa (235 ksi) vs 800 MPa (116 ksi). In exchange, 835M30 Annealed is the more ductile: elongation 18% versus 9% for 835M30-Z, and 835M30-Z is harder (470 HB vs 240 HB). 835M30 Annealed runs hotter in service (400°C vs 250°C continuous). On the shop floor, 835M30 Annealed machines more easily (fair vs poor) and 835M30 Annealed welds better (fair vs poor).
835M30 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
835M30-ZChoose it when strength drives the design.
835M30 Annealed vs 835M30-Z: 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
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 1,150 MPa167 ksi · Shear Strength 700 MPa102 ksi · Hardness, Vickers 355 HV
Physical
Density and transition temperatures.
Same in both: Density 7.84 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 33 W/m·K19.1 BTU/hr·ft·°F · Specific Heat Capacity 470 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 250 J/g107 BTU/lb · Min Service Temperature -70°C-94 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 5.5 % IACS · Electrical Resistivity 3.1×10⁻⁷ Ω·m12.2 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 16 / 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 45 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 36 MJ/kg15,477 BTU/lb · Embodied Carbon (primary production) 2.9 kg CO₂/kg · Embodied Water 60 L/kg7.2 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.
835M30 Annealed vs 835M30-Z — frequently asked
Is 835M30-Z stronger than 835M30 Annealed?
Yes. 835M30-Z has a typical yield strength of 1,400 MPa (203 ksi) against 560 MPa (81.2 ksi) for 835M30 Annealed — about 150% more. Tensile strength is 1,620 MPa (235 ksi) vs 800 MPa (116 ksi).
Which condition does FabDigit quote by default, Annealed or Z?
W is the default 835M30 condition in the FabDigit quote flow (neither Annealed nor Z). 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, 835M30 Annealed or 835M30-Z?
835M30 Annealed. Its machinability rates fair (45/100) against poor (15/100) for 835M30-Z; for welding the order is 835M30 Annealed first (fair, 50/100) then 835M30-Z (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 835M30 Annealed and 835M30-Z 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.