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Steel GX5NiS36 vs K93603

Steel · grade comparison

Steel GX5NiS36 and K93603 are both steel grades. K93603 is the stronger of the two: yield strength 270 MPa (39.2 ksi) against 200 MPa (29 ksi) for GX5NiS36, about 35% more; tensile strength follows at 480 MPa (69.6 ksi) vs 420 MPa (60.9 ksi). K93603 is the more ductile: elongation 32% versus 12% for GX5NiS36, and K93603 is harder (145 HB vs 135 HB).

K93603Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.

GX5NiS36 vs K93603: properties

GX5NiS36K93603

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

140 GPa20.3 Msi
141 GPa20.5 Msi

Bulk Modulus

105 GPa15.2 Msi
110 GPa16 Msi

Tensile Strength (Ultimate)

420 MPa60.9 ksi
480 MPa69.6 ksi

Yield Strength (0.2% offset)

200 MPa29 ksi
270 MPa39.2 ksi

Elongation at Break

12%
32%

Reduction in Area

20%
55%

Compressive Strength

430 MPa62.4 ksi
275 MPa39.9 ksi

Shear Strength

300 MPa43.5 ksi
340 MPa49.3 ksi

Fatigue Strength (Endurance Limit)

160 MPa23.2 ksi
250 MPa36.3 ksi

Fracture Toughness (K_IC)

58 MPa·√m52.8 ksi·√in
—

Charpy V-Notch Impact (RT)

20 J14.8 ft·lbf
60 J44.3 ft·lbf

Hardness, Brinell

135 HB
145 HB

Hardness, Rockwell B

75 HRB
78 HRB

Hardness, Vickers

142 HV
152 HV

Same in both: Shear Modulus 55 GPa8 Msi · Poisson's Ratio 0.29

Physical

Density and transition temperatures.

Density

8.1 g/cm³0.29 lb/in³
8.05 g/cm³0.29 lb/in³

Melting Point (Solidus)

1,425°C2,597 °F
1,427°C2,601 °F

Same in both: Liquidus Temperature 1,450°C2,642 °F

Thermal

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

Thermal Conductivity

11.5 W/m·K6.6 BTU/hr·ft·°F
10.5 W/m·K6.1 BTU/hr·ft·°F

Thermal Expansion (CTE, 20–100 °C)

3 µm/m·K1.7 µin/in·°F
1.7 µm/m·K0.94 µin/in·°F

Min Service Temperature

-150°C-238 °F
-253°C-423 °F

Same in both: Specific Heat Capacity 515 J/kg·K0.12 BTU/lb·°F · Latent Heat of Fusion 275 J/g118 BTU/lb · Max Service Temperature (continuous) 200°C392 °F

Electrical

Conductivity and insulation.

Same in both: Electrical Conductivity 2.1 % IACS · Electrical Resistivity 8.2×10⁻⁷ Ω·m32.3 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

30 / 100
28 / 100

Galvanic Potential (seawater, vs SCE)

—
-0.35 V

Manufacturability

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

Machinability

40 / 100
45 / 100

Machinability Rating (AISI 1212 = 100 %)

35%
45%

Formability (cold)

10 / 100
60 / 100

Castability

60 / 100
35 / 100

Brazeability / Solderability

55 / 100
60 / 100

Polishability

45 / 100
55 / 100

Same in both: Weldability 25 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

110 MJ/kg47,292 BTU/lb
80 MJ/kg34,394 BTU/lb

Embodied Carbon (primary production)

8.5 kg CO₂/kg
6 kg CO₂/kg

Embodied Water

300 L/kg35.9 gal/lb
210 L/kg25.2 gal/lb

Typical Recycled Content

35%
25%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

52 kN·m/kg
60 kN·m/kg

Specific Stiffness (E / density)

17.3 MN·m/kg
17.5 MN·m/kg

Modulus of Resilience

143 kJ/m³
259 kJ/m³

Thermal Diffusivity

2.8 mm²/s
2.5 mm²/s

Thermal Shock Resistance Index

12
21

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.

2005001,0002,0007.588.5Density (g/cm³)Yield strength (MPa) — log scaleGX5NiS36K93603

Manufacturing and finishing

CapabilityGX5NiS36K93603
Default condition——
Relative cost$$$$ High$$$$ High
Min. machined wall——
Best machined surface——

Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.

GX5NiS36 vs K93603 — frequently asked

Is K93603 stronger than GX5NiS36?

Yes. K93603 has a typical yield strength of 270 MPa (39.2 ksi) against 200 MPa (29 ksi) for GX5NiS36 — about 35% more. Tensile strength is 480 MPa (69.6 ksi) vs 420 MPa (60.9 ksi).

Which is cheaper, GX5NiS36 or K93603?

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 is easier to machine, GX5NiS36 or K93603?

K93603, by a small margin. Both rate fair for machinability — 45/100 against 40/100 for GX5NiS36.

Ready to make it?

Upload a CAD file and FabDigit prices the part in GX5NiS36 and K93603 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.