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Titanium Grade 23 vs SP-700

Titanium · grade comparison

Titanium Grade 23 and SP-700 are both titanium grades. Both yield at about 850 MPa — strength does not separate them. SP-700 is the more ductile: elongation 17% versus 15% for Grade 23, and Grade 23 is harder (320 HB vs 300 HB). On the shop floor, Grade 23 welds better (very good vs good).

Grade 23Choose it when it will be welded.

SP-700Choose it when the part is bent, formed or impact-loaded.

Grade 23 vs SP-700: properties

Grade 23SP-700

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

113 GPa16.4 Msi
112 GPa16.2 Msi

Shear Modulus

44 GPa6.4 Msi
43 GPa6.2 Msi

Poisson's Ratio

0.34
0.32

Yield Strength (0.2% offset)

850 MPa123 ksi
860 MPa125 ksi

Elongation at Break

15%
17%

Reduction in Area

35%
40%

Compressive Strength

970 MPa141 ksi
900 MPa131 ksi

Fatigue Strength (Endurance Limit)

510 MPa74 ksi
520 MPa75.4 ksi

Fracture Toughness (K_IC)

85 MPa·√m77.4 ksi·√in
65 MPa·√m59.2 ksi·√in

Hardness, Brinell

320 HB
300 HB

Hardness, Rockwell C

33 HRC
32 HRC

Hardness, Vickers

340 HV
310 HV

Same in both: Bulk Modulus 110 GPa16 Msi · Tensile Strength (Ultimate) 930 MPa135 ksi · Shear Strength 580 MPa84.1 ksi · Charpy V-Notch Impact (RT) 22 J16.2 ft·lbf

Physical

Density and transition temperatures.

Density

4.43 g/cm³0.16 lb/in³
4.54 g/cm³0.16 lb/in³

Melting Point (Solidus)

1,604°C2,919 °F
1,590°C2,894 °F

Liquidus Temperature

1,660°C3,020 °F
1,650°C3,002 °F

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

6.7 W/m·K3.9 BTU/hr·ft·°F
7 W/m·K4 BTU/hr·ft·°F

Specific Heat Capacity

526 J/kg·K0.13 BTU/lb·°F
530 J/kg·K0.13 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

8.6 µm/m·K4.8 µin/in·°F
9.4 µm/m·K5.2 µin/in·°F

Latent Heat of Fusion

365 J/g157 BTU/lb
390 J/g168 BTU/lb

Min Service Temperature

-253°C-423 °F
-196°C-321 °F

Same in both: Max Service Temperature (continuous) 350°C662 °F

Electrical

Conductivity and insulation.

Electrical Resistivity

1.71×10⁻⁶ Ω·m67.3 µΩ·in
1.7×10⁻⁶ Ω·m66.9 µΩ·in

Same in both: Electrical Conductivity 1 % IACS

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

92 / 100
88 / 100

Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability Rating (AISI 1212 = 100 %)

22%
20%

Weldability

80 / 100
65 / 100

Formability (cold)

35 / 100
45 / 100

Castability

40 / 100
30 / 100

Brazeability / Solderability

35 / 100
45 / 100

Polishability

80 / 100
70 / 100

Same in both: Machinability 20 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

700 MJ/kg300,946 BTU/lb
650 MJ/kg279,450 BTU/lb

Embodied Carbon (primary production)

45 kg CO₂/kg
42 kg CO₂/kg

Embodied Water

480 L/kg57.5 gal/lb
900 L/kg108 gal/lb

Typical Recycled Content

15%
25%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

210 kN·m/kg
205 kN·m/kg

Specific Stiffness (E / density)

25.5 MN·m/kg
24.7 MN·m/kg

Modulus of Resilience

3,197 kJ/m³
3,302 kJ/m³

Same in both: Thermal Diffusivity 2.9 mm²/s · Thermal Shock Resistance Index 6

Strength versus weight

Yield strength against density for every titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.

3005007001,0004.555.5Density (g/cm³)Yield strength (MPa) — log scaleGrade 23SP-700

Manufacturing and finishing

CapabilityGrade 23SP-700
CNC machiningYes—
Sheet metalYes—
3D printingYes—
Default conditionO—
Relative cost$$$$ High$$$$ High
Min. machined wall1 mm—
Best machined surfaceRa 1.6 µm—
AlCrNYes—
AlTiNYes—
Anodizing Type IIYes—
CVD Al2O3Yes—
CVD TiCNYes—
CVD TiNYes—
CerakoteYes—
CrNYes—
DLCYes—
ElectropolishingYes—
HVOF CoatingYes—
MoS2Yes—
Multilayer CVDYes—
TiAlNYes—
TiB2Yes—
TiCNYes—
TiNYes—
WC/CYes—

They share 1 finish: Plasma Spray.

Grade 23 vs SP-700 — frequently asked

What is the difference between Grade 23 and SP-700?

Titanium Grade 23 and SP-700 are both titanium grades. Both yield at about 850 MPa — strength does not separate them. SP-700 is the more ductile: elongation 17% versus 15% for Grade 23, and Grade 23 is harder (320 HB vs 300 HB).

Which is cheaper, Grade 23 or SP-700?

Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.

Which welds better, Grade 23 or SP-700?

Grade 23. Its weldability rates very good (80/100) against good (65/100) for SP-700.

Ready to make it?

Upload a CAD file and FabDigit prices the part in Grade 23 and SP-700 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.