Stainless Steel ER630-H1025 vs ER630-H925
Stainless Steel · ER630 temper comparison
ER630-H1025 and ER630-H925 are two conditions of the same stainless steel grade, ER630: H1025 (aged 552 °C (1025 °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 1,000 MPa (145 ksi) for ER630-H1025, about 7% more; tensile strength follows at 1,170 MPa (170 ksi) vs 1,070 MPa (155 ksi). In exchange, ER630-H1025 is the more ductile: elongation 13% versus 11% for ER630-H925, and ER630-H925 is harder (390 HB vs 352 HB).
ER630-H1025Choose it when the part is bent, formed or impact-loaded.
ER630-H925Choose it when strength drives the design.
ER630-H1025 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-H1025 vs ER630-H925 — frequently asked
Is ER630-H925 stronger than ER630-H1025?
Yes. ER630-H925 has a typical yield strength of 1,070 MPa (155 ksi) against 1,000 MPa (145 ksi) for ER630-H1025 — about 7% more. Tensile strength is 1,170 MPa (170 ksi) vs 1,070 MPa (155 ksi).
Which condition does FabDigit quote by default, H1025 or H925?
AW is the default ER630 condition in the FabDigit quote flow (neither H1025 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-H1025 or ER630-H925?
ER630-H1025, by a small margin. Both rate poor for machinability — 33/100 against 28/100 for ER630-H925; for welding the order is ER630-H1025 first (good, 60/100) then ER630-H925 (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER630-H1025 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.