FabDigit

Steel 4J50 vs GX3Ni36 vs GX5NiS36 vs K93050

Benchmark · 4 materials

Side-by-side benchmark of 4 steel grades.

4J50 vs GX3Ni36 and 2 more: properties

4J50GX3Ni36GX5NiS36K93050

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

150 GPa21.8 Msi
140 GPa20.3 Msi
140 GPa20.3 Msi
141 GPa20.5 Msi

Shear Modulus

58 GPa8.4 Msi
55 GPa8 Msi
55 GPa8 Msi
55 GPa8 Msi

Bulk Modulus

120 GPa17.4 Msi
105 GPa15.2 Msi
105 GPa15.2 Msi
112 GPa16.2 Msi

Tensile Strength (Ultimate)

510 MPa74 ksi
450 MPa65.3 ksi
420 MPa60.9 ksi
490 MPa71.1 ksi

Yield Strength (0.2% offset)

280 MPa40.6 ksi
240 MPa34.8 ksi
200 MPa29 ksi
280 MPa40.6 ksi

Elongation at Break

35%
25%
12%
40%

Reduction in Area

60%
33%
20%
70%

Shear Strength

320 MPa46.4 ksi
320 MPa46.4 ksi
300 MPa43.5 ksi
340 MPa49.3 ksi

Fatigue Strength (Endurance Limit)

230 MPa33.4 ksi
195 MPa28.3 ksi
160 MPa23.2 ksi
260 MPa37.7 ksi

Charpy V-Notch Impact (RT)

100 J73.8 ft·lbf
60 J44.3 ft·lbf
20 J14.8 ft·lbf
180 J133 ft·lbf

Hardness, Brinell

135 HB
130 HB
135 HB
135 HB

Hardness, Rockwell B

75 HRB
73 HRB
75 HRB
75 HRB

Hardness, Vickers

140 HV
137 HV
142 HV
140 HV

Compressive Strength

245 MPa35.5 ksi
430 MPa62.4 ksi
285 MPa41.3 ksi

Fracture Toughness (K_IC)

75 MPa·√m68.3 ksi·√in
58 MPa·√m52.8 ksi·√in

Same in both: Poisson's Ratio 0.29

Physical

Density and transition temperatures.

Density

8.2 g/cm³0.3 lb/in³
8.1 g/cm³0.29 lb/in³
8.1 g/cm³0.29 lb/in³
8.05 g/cm³0.29 lb/in³

Melting Point (Solidus)

1,425°C2,597 °F
1,425°C2,597 °F
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

13.5 W/m·K7.8 BTU/hr·ft·°F
11 W/m·K6.4 BTU/hr·ft·°F
11.5 W/m·K6.6 BTU/hr·ft·°F
10.5 W/m·K6.1 BTU/hr·ft·°F

Specific Heat Capacity

500 J/kg·K0.12 BTU/lb·°F
515 J/kg·K0.12 BTU/lb·°F
515 J/kg·K0.12 BTU/lb·°F
515 J/kg·K0.12 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

9.5 µm/m·K5.3 µin/in·°F
2.2 µm/m·K1.2 µin/in·°F
3 µm/m·K1.7 µin/in·°F
1.3 µm/m·K0.72 µin/in·°F

Latent Heat of Fusion

270 J/g116 BTU/lb
275 J/g118 BTU/lb
275 J/g118 BTU/lb
270 J/g116 BTU/lb

Max Service Temperature (continuous)

500°C932 °F
200°C392 °F
200°C392 °F
230°C446 °F

Min Service Temperature

-100°C-148 °F
-196°C-321 °F
-150°C-238 °F
-269°C-452 °F

Electrical

Conductivity and insulation.

Electrical Conductivity

4 % IACS
2.1 % IACS
2.1 % IACS
2.1 % IACS

Electrical Resistivity

4.3×10⁻⁷ Ω·m16.9 µΩ·in
8.2×10⁻⁷ Ω·m32.3 µΩ·in
8.2×10⁻⁷ Ω·m32.3 µΩ·in
8.2×10⁻⁷ Ω·m32.3 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

32 / 100
25 / 100
30 / 100
28 / 100

Galvanic Potential (seawater, vs SCE)

-0.35 V
-0.4 V

Manufacturability

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

Machinability

35 / 100
30 / 100
40 / 100
30 / 100

Machinability Rating (AISI 1212 = 100 %)

30%
25%
35%
30%

Weldability

70 / 100
58 / 100
25 / 100
75 / 100

Formability (cold)

85 / 100
20 / 100
10 / 100
85 / 100

Brazeability / Solderability

80 / 100
65 / 100
55 / 100
75 / 100

Polishability

70 / 100
70 / 100
45 / 100
70 / 100

Castability

50 / 100
60 / 100
45 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

80 MJ/kg34,394 BTU/lb
90 MJ/kg38,693 BTU/lb
110 MJ/kg47,292 BTU/lb
66 MJ/kg28,375 BTU/lb

Embodied Carbon (primary production)

7 kg CO₂/kg
7 kg CO₂/kg
8.5 kg CO₂/kg
5.2 kg CO₂/kg

Embodied Water

200 L/kg24 gal/lb
200 L/kg24 gal/lb
300 L/kg35.9 gal/lb
120 L/kg14.4 gal/lb

Typical Recycled Content

20%
45%
35%
30%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

62 kN·m/kg
56 kN·m/kg
52 kN·m/kg
61 kN·m/kg

Specific Stiffness (E / density)

18.3 MN·m/kg
17.3 MN·m/kg
17.3 MN·m/kg
17.5 MN·m/kg

Modulus of Resilience

261 kJ/m³
206 kJ/m³
143 kJ/m³
278 kJ/m³

Thermal Diffusivity

3.3 mm²/s
2.6 mm²/s
2.8 mm²/s
2.5 mm²/s

Thermal Shock Resistance Index

5
16
12
28

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 scaleGX3Ni36GX5NiS36K930504J50

Manufacturing and finishing

Capability4J50GX3Ni36GX5NiS36K93050
Default condition
Relative cost$$$$ High$$$$ High$$$$ High$$$$ 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.

Ready to make it?

Upload a CAD file and FabDigit prices the part in 4J50 and GX3Ni36 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.