Stainless Steel ER630-H1075 vs ER630-H925
Stainless Steel · ER630 temper comparison
ER630-H1075 and ER630-H925 are two conditions of the same stainless steel grade, ER630: H1075 (aged 579 °C (1075 °F) for 4 h) versus H925 (aged 496 °C (925 °F) for 4 h). The chemistry is identical, so every difference below comes from the condition. ER630-H925 is the stronger of the two: yield strength 1,070 MPa (155 ksi) against 860 MPa (125 ksi) for ER630-H1075, about 24% more; tensile strength follows at 1,170 MPa (170 ksi) vs 1,000 MPa (145 ksi). In exchange, ER630-H1075 is the more ductile: elongation 14% versus 11% for ER630-H925, and ER630-H925 is harder (390 HB vs 331 HB). ER630-H1075 runs hotter in service (370°C vs 315°C continuous).
ER630-H1075Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
ER630-H925Choose it when strength drives the design.
ER630-H1075 vs ER630-H925: 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.
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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.27
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 -70°C-94 °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) -0.3 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) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 5 kg CO₂/kg · Embodied Water 180 L/kg21.6 gal/lb · Typical Recycled Content 50%
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.
ER630-H1075 vs ER630-H925 — frequently asked
Is ER630-H925 stronger than ER630-H1075?
Yes. ER630-H925 has a typical yield strength of 1,070 MPa (155 ksi) against 860 MPa (125 ksi) for ER630-H1075 — about 24% more. Tensile strength is 1,170 MPa (170 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, H1075 or H925?
AW is the default ER630 condition in the FabDigit quote flow (neither H1075 nor H925). 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, ER630-H1075 or ER630-H925?
ER630-H1075. Its machinability rates fair (37/100) against poor (28/100) for ER630-H925; for welding the order is ER630-H1075 first (good, 62/100) then ER630-H925 (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER630-H1075 and ER630-H925 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.