Hastelloy G30 shows superior resistance to oxidizing acids, in particular phosphoric.
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| Physical Property | Imperial Units | Metric Units | ||
| Density | RT | 0.297 lb/in3 | RT | 8.22 g/cm3 |
| Electrical Resistivity | RT | 45.7 μ0hm.in | RT | 1.16 μ0hm.m |
| 200°F | 46.0 μ0hm.in | 100°C | 1.17 μ0hm.m | |
| 400°F | 46.9 μ0hm.in | 200°C | 1.19 μ0hm.m | |
| 600°F | 47.8 μ0hm.in | 300°C | 1.21 μ0hm.m | |
| 800°F | 48.5 μ0hm.in | 400°C | 1.23 μ0hm.m | |
| 1000°F | 49.0 μ0hm.in | 500°C | 1.24 μ0hm.m | |
| — | — | 600°C | 1.25 μ0hm.m | |
| Thermal Conductivity | RT | 69 btu.in/h.ft2.°F | RT | 10 W/m.°C |
| 200°F | 81 btu.in/h.ft2.°F | 100°C | 12 W/m.°C | |
| 400°F | 98 btu.in/h.ft2.°F | 200°C | 14 W/m.°C | |
| 600°F | 120 btu.in/h.ft2.°F | 300°C | 17 W/m.°C | |
| 800°F | 134 btu.in/h.ft2.°F | 400°C | 19 W/m.°C | |
| 1000°F | 141 btu.in/h.ft2.°F | 500°C | 20 W/m.°C | |
| — | — | 600°C | 21 W/m.°C | |
| Mean Coefficient of Thermal Expansion | 86-200°F | 7.1 μin/in. °F | 30-100°C | 12.8 μm/m.°C |
| 86-400°F | 7.7 μin/in. °F | 30-200°C | 13.8 μm/m.°C | |
| 86-600°F | 8.0 μin/in. °F | 30-300°C | 14.3 μm/m.°C | |
| 86-800°F | 8.3 μin/in. °F | 30-400°C | 14.8 μm/m.°C | |
| 86-1000°F | 8.6 μin/in. °F | 30-500°C | 15.3 μm/m.°C | |
| 86-1200°F | 8.9 μin/in. °F | 30-600°C | 15.8 μm/m.°C | |
| Dynamic Modulus of Elasticity | RT | 29.3 x 106 psi | RT | 202 GPa |
| 400°F | 28.4 x 106 psi | 200°C | 196 GPa | |
| 600°F | 28.2 x 106 psi | 300°C | 195 GPa | |
| 800°F | 27.8 x 106 psi | 400°C | 192 GPa | |
| 1000°F | 26.7 x 106 psi | 500°C | 187 GPa | |
RT = Room Temperature
| Form | Thickness/ Bar Diameter | Test Temperature | 0.2% Offset Yield Strength | Ultimate Tensile Strength | Elongation | ||||
| in. | mm. | °F | °C | ksi | MPa | ksi | MPa | % | |
| Sheet | 0.028 | 0.71 | RT | RT | 47 | 324 | 100 | 689 | 56 |
| Sheet | 0.125 | 3.20 | RT | RT | 51 | 352 | 100 | 689 | 56 |
| Plate | 0.250 | 6.40 | RT | RT | 46 | 317 | 98 | 676 | 55 |
| Plate | 0.375 | 9.50 | RT | RT | 45 | 310 | 100 | 689 | 65 |
| Plate | 0.500 | 12.70 | RT | RT | 46 | 317 | 100 | 689 | 64 |
| Plate | 0.750 | 19.10 | RT | RT | 47 | 324 | 98 | 676 | 65 |
| Plate | 1.250 | 31.80 | RT | RT | 45 | 310 | 99 | 683 | 60 |
| Bar | 1 | 25.40 | RT | RT | 46 | 317 | 100 | 689 | 60 |
| Plate & Bar* | Various | 200 | 93 | 42 | 290 | 95 | 655 | 54 | |
| Plate & Bar* | Various | 400 | 204 | 36 | 248 | 88 | 607 | 59 | |
| Plate & Bar* | Various | 600 | 316 | 33 | 228 | 83 | 572 | 59 | |
| Plate & Bar* | Various | 800 | 427 | 31 | 214 | 80 | 552 | 60 | |
| Plate & Bar* | Various | 1000 | 538 | 29 | 200 | 76 | 524 | 62 | |
*Average results from tests of 11 plate and bar products of thickness/diameter 6.4 to 31.8 mm
RT= Room Temperature
| Test Temperature | Impact Strength | ||
| °F | °C | ft-lbf | J |
| RT | RT | 326 | 442 |
| -320 | -196 | 389 | 527 |
Impact strengths were generated using Charpy V-notch samples, machined from mill annealed plate.
| Form | Hardness, HRBW | Typical ASTM Grain Size |
| Sheet | 81 | 1.5 – 4 |
| Plate | 80 | 0 – 3 |
| Bar | 78 | 0 – 2 |
All samples tested in solution-annealed condition.
HRBW = Hardness Rockwell “B”, Tungsten Indentor.
| Conc. Wt. % | 50°F | 75°F | 100°F | 125°F | 150°F | 175°F | 200°F | 225°F | Boiling |
| 10°C | 24°C | 38°C | 52°C | 66°C | 79°C | 93°C | 107°C | ||
| 1 | — | — | — | — | <0.01 | <0.01 | <0.01 | — | 0.01 |
| 1.5 | — | — | — | — | — | — | — | — | — |
| 2 | — | — | — | <0.01 | <0.01 | — | — | — | 9.47 |
| 2.5 | — | — | — | <0.01 | 1.04 | 2.06 | 4.23 | — | 12.67 |
| 3 | — | — | <0.01 | <0.01 | — | — | — | — | — |
| 3.5 | — | — | — | — | — | — | — | — | — |
| 4 | — | — | — | — | — | — | — | — | — |
| 4.5 | — | — | — | — | — | — | — | — | — |
| 5 | — | <0.01 | 0.33 | 0.71 | 1.33 | 2.65 | 9.06 | — | — |
| 7.5 | < 0.01 | 0.05 | — | — | — | — | — | — | — |
| 10 | 0.08 | 0.19 | 0.44 | 0.64 | 1.48 | 3.96 | 15.21 | — | — |
| 15 | 0.13 | 0.31 | 0.66 | 1.87 | 1.47 | — | 11.98 | — | — |
| 20 | — | 0.13 | 0.3 | 0.55 | 1.24 | — | 10.9 | — | — |
All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
| Conc. Wt. % | 75°F | 100°F | 125°F | 150°F | 175°F | 200°F | 225°F | 250°F | Boiling |
| 24°C | 38°C | 52°C | 66°C | 79°C | 93°C | 107°C | 121°C | ||
| 1 | — | — | — | — | — | — | — | — | — |
| 2 | — | — | — | — | — | — | — | — | — |
| 3 | — | — | — | — | — | — | — | — | — |
| 4 | — | — | — | — | — | — | — | — | — |
| 5 | — | — | — | — | <0.01 | <0.01 | — | — | 0.47 |
| 10 | — | — | — | — | <0.01 | <0.01 | — | — | 0.78 |
| 20 | — | — | — | — | <0.01 | 0.36 | — | — | 1.35 |
| 30 | — | — | — | — | 0.01 | 0.55 | — | — | 1.53 |
| 40 | — | — | — | 0.02 | 0.05 | 0.54 | — | — | 1.95 |
| 50 | — | <0.01 | <0.01 | 0.01 | 0.26 | 0.56 | 0.93 | — | 3.68 |
| 60 | — | — | <0.01 | 0.09 | 0.27 | 0.73 | 1.07 | — | 8.46 |
| 70 | — | <0.01 | 0.01 | 0.11 | 0.36 | 0.98 | 1.38 | — | — |
| 80 | — | — | 0.31 | 1.13 | 2.62 | 4.52 | 4.7 | — | — |
| 90 | — | <0.01 | 0.67 | 2.01 | 3.25 | 6.55 | 6.25 | — | — |
| 96 | — | — | 0.45 | 1.86 | 2.04 | 1.86 | 1.52 | — | — |
All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
| Chemical | Concentration | 100°F | 125°F | 150°F | 175°F | 200°F | Boiling |
| wt. % | 38°C | 52°C | 66°C | 79°C | 93°C | ||
| Acetic Acid | 99 | — | — | — | — | — | 0.03 |
| Chromic Acid | 5 | — | — | 0.02 | — | — | 0.40 |
| 10 | — | — | 0.14 | — | — | 1.23 | |
| Formic Acid | 88 | — | — | — | — | — | 0.05 |
| Hydrochloric Acid |
1 | — | — | <0.01 | <0.01 | <0.01 | 0.01 |
| 2 | — | <0.01 | <0.01 | — | — | 9.47 | |
| 2.5 | — | <0.01 | 1.04 | 2.06 | 4.23 | — | |
| 3 | <0.01 | <0.01 | — | — | — | — | |
| 5 | 0.33 | 0.71 | 1.33 | 2.65 | — | — | |
| 10 | 0.44 | 0.64 | 1.48 | 3.96 | — | — | |
| 15 | 0.66 | 1.87 | 1.47 | — | — | — | |
| 20 | 0.30 | 0.55 | 1.24 | — | — | — | |
| Nitric Acid |
50 | — | — | — | — | — | 0.08 |
| 60 | — | — | — | — | — | 0.14 | |
| 65 | — | — | — | — | — | 0.16 | |
| Phosphoric Acid (Reagent Grade) |
50 | — | — | — | — | <0.01 | 0.01 |
| 60 | — | — | — | — | — | 0.14 | |
| 70 | — | — | — | — | 0.01 | 0.35 | |
| 80 | — | — | — | — | — | 0.61 | |
| 85 | — | — | — | — | — | 0.84 | |
| Sulfuric Acid |
10 | — | — | — | <0.01 | <0.01 | 0.78 |
| 20 | — | — | — | <0.01 | 0.36 | 1.35 | |
| 30 | — | — | — | 0.01 | 0.55 | 1.53 | |
| 40 | — | — | 0.02 | 0.05 | 0.54 | 1.95 | |
| 50 | <0.01 | <0.01 | 0.01 | 0.26 | 0.56 | — | |
| 60 | — | <0.01 | 0.09 | 0.27 | 0.73 | — | |
| 70 | <0.01 | 0.01 | 0.11 | 0.36 | 0.98 | — | |
| 80 | — | 0.31 | 1.13 | 2.62 | 4.52 | — | |
| 90 | <0.01 | 0.67 | 2.01 | 3.25 | 6.55 | — | |
| 96 | — | 0.45 | 1.86 | 2.04 | 1.86 | — |
All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
| Environment | Lowest Temp. Pitting Observed (24 hours) | Lowest Temp. Crevice Corrosion Observed (24 hours) |
|---|---|---|
| Green Death | 55°C | 45°C |
| Yellow Death | 55°C | 25°C |
Green Death: 11.5% H2 SO4 + 1.2% HCl + 1% FeCl3 + 1% CuCl2
Yellow Death: 4% NaCl + 0.1% Fe2 (SO4 )3 + 0.021M HCl
| Alloy | Time to Cracking |
|---|---|
| 316L | 2 h |
| 254SMO | 24 h |
| 28 | 36 h |
| 31 | 36 h |
| G-30® | 168 h |
| Chemical | Concentration | Temperature | Corrosion Rate | ||||
| wt. % | °F | °C | Weld Metal | Wrought Base Metal | |||
| mpy | mm/y | mpy | mm/y | ||||
| H2SO4 | 30 | 150 | 66 | <0.4 | <0.01 | <0.4 | <0.01 |
| H2SO4 | 50 | 150 | 66 | 0.4 | 0.01 | 0.4 | 0.01 |
| H2SO4 | 70 | 150 | 66 | 5.5 | 0.14 | 4.3 | 0.11 |
| H2SO4 | 90 | 150 | 66 | 102.4 | 2.60 | 102.8 | 2.61 |
| HCI | 5 | 100 | 38 | <0.4 | <0.01 | 13 | 0.33 |
| HCI | 10 | 100 | 38 | 27.6 | 0.70 | 17.3 | 0.44 |
| HCI | 15 | 100 | 38 | 25.2 | 0.64 | 26 | 0.66 |
| HCI | 20 | 100 | 38 | 20.5 | 0.52 | 11.8 | 0.30 |
| HNO3 | 70 | Boiling | 5.5 | 0.14 | 5.5 | 0.14 | |
