Stainless Steel E630-H1075 vs E630-H900
Stainless Steel · E630 temper comparison
E630-H1075 and E630-H900 are two conditions of the same stainless steel grade, E630: H1075 (aged 579 °C (1075 °F) for 4 h) versus H900 (aged 482 °C (900 °F) for 1 h, peak hardness). The chemistry is identical, so every difference below comes from the condition. E630-H900 is the stronger of the two: yield strength 1,170 MPa (170 ksi) against 930 MPa (135 ksi) for E630-H1075, about 26% more; tensile strength follows at 1,310 MPa (190 ksi) vs 1,000 MPa (145 ksi). In exchange, E630-H1075 is the more ductile: elongation 13% versus 9% for E630-H900, and E630-H900 is harder (42 HRC vs 33 HRC). E630-H1075 runs hotter in service (400°C vs 300°C continuous) and E630-H1075 conducts heat better (21.5 W/m·K vs 17.9 W/m·K).
E630-H1075Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
E630-H900Choose it when strength drives the design.
E630-H1075 vs E630-H900: 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 196 GPa28.4 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 142 GPa20.6 Msi · Poisson's Ratio 0.27 · Hardness, Brinell 311 HB
Physical
Density and transition temperatures.
Same in both: Density 7.78 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,404°C2,559 °F · Liquidus Temperature 1,440°C2,624 °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 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.8 µm/m·K6 µin/in·°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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 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: Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 62 MJ/kg26,655 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 55%
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.
E630-H1075 vs E630-H900 — frequently asked
Is E630-H900 stronger than E630-H1075?
Yes. E630-H900 has a typical yield strength of 1,170 MPa (170 ksi) against 930 MPa (135 ksi) for E630-H1075 — about 26% more. Tensile strength is 1,310 MPa (190 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, H1075 or H900?
AW is the default E630 condition in the FabDigit quote flow (neither H1075 nor H900). 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 welds better, E630-H1075 or E630-H900?
E630-H900. Its weldability rates good (65/100) against good (60/100) for E630-H1075.
Ready to make it?
Upload a CAD file and FabDigit prices the part in E630-H1075 and E630-H900 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.