Alloy G30, 2.4603, UNS N06030, Hastelloy® G30 - nickel alloy

Alloy G30, 2.4603, UNS N06030, Hastelloy® G-30 - nickel alloy according to ASTM B581-17

Alloy G30, 2.4603, UNS N06030, Hastelloy® G-30 – description

Alloy G30 (Hastelloy® G-30, UNS N06030) is a Ni-Cr-Fe corrosion-resistant alloy with alloying additions of molibdenum, tungsten, copper and niobium. Generally resistant to oxidizing environments, it's extremely resistant to phosphoric acid (P₂O₅) and thus used widely in the production of agrichemical fertilizers. It can be seen as a low-carbon variant of alloy G, with improved weldability (it's less prone to heat-affected zome carbide precipitation and hot-cracking), and ductility.

Applications

Used in phosphoric acid plants, sulphuric acid service, nitric acid service, pickling operations, petrochemical operations, fertilizer manufacture, pesticide manufacture, gold extraction and nuclear waste processing.

Physical and Tensile Properties

Room temperature physical properties:

• Density: 8.22 g/cm³

High-Temperature Coefficient of Thermal Expansion, from 20°C to:

• 100°C: 12.8 μm/m⋅K
• 200°C: 13.8 μm/m⋅K
• 300°C: 14.3 μm/m⋅K
• 400°C: 14.8 μm/m⋅K
• 500°C: 15.3 μm/m⋅K
• 600°C: 15.8 μm/m⋅K

Thermal Conductivity:

• 20°C: 10 W/m · K
• 100°C: 12 W/m · K
• 200°C: 14 W/m · K
• 300°C: 17 W/m · K
• 400°C: 19 W/m · K
• 500°C: 20 W/m · K
• 600°C: 21 W/m · K

Electrical Resistivity:

• 20°C: 1.16 μΩ·m
• 100°C: 1.17 μΩ·m
• 200°C: 1.19 μΩ·m
• 300°C: 1.21 μΩ·m
• 400°C: 1.23 μΩ·m
• 500°C: 1.24 μΩ·m
• 600°C: 1.25 μΩ·m

Young's Modulus:

• 20°C: 202 GPa
• 100°C: 196 GPa
• 200°C: 195 GPa
• 300°C: 192 GPa
• 400°C: 187 GPa

High-Temperature Mechanical Properties of alloy G-30:

• 20°C:
  • Yield strength: 310-351 MPa
  • Tensile strength: 678-710 MPa
  • Elongation: 53-65 %
  • Reduction of area: 67-77 %
  • Hardness: 90 HRB
• 93°C:
  • Yield strength: 289 MPa
  • Tensile strength: 655 MPa
  • Elongation: 54 %
• 204°C:
  • Yield strength: 248 MPa
  • Tensile strength: 607 %
  • Elongation: 59 %
• 316°C:
  • Tensile strength: 980 MPa
  • Elongation: 59 %
• 427°C:
  • Yield strength: 214 MPa
  • Tensile strength: 552 %
  • Elongation: 60 %
• 538°C:
  • Yield strength: 200 MPa
  • Tensile strength: 524 MPa
  • Elongation: 62 %

Impact Strength:

• 20°C: 442 J
• -196°C: 527 J

Corrosion Resistance

High general corrosion resistance, especially in oxidizing environments, most especially in the "wet process" reacting phosphorate rock with sulfuric acid to produce phosphoric acid (usually concentrated up to 54%).

Various acidic media corrosion rates:

• Acetic acid (CH₃COOH) 99%, boiling: 0.03 mm/year
• Formic acid (CH₂O₂) 88%, boiling: 0.05 mm/year
• Nitric acid (HNO₃) 10%, boiling: 0.01 mm/year
• 60%, boiling: 0.14 mm/year
• 65%, boiling: 0.13 mm/year
• 20% + 1% HF°C, at 80°C°C: 0.78 mm/year
• 20% + 6% HF°C, at 80°C°C: 4.43 mm/year
• 50% + 1% HF°C, at 80°C°C: 4.8 mm/year
• 56% + 0.5% HF°C, at 110°C°C: 1.18 mm/year
• 56% + 0.5% HF + 200 ppm Cl^-°C, at 110°C°C: 1.25 mm/year
• Sulfuric acid (H₂SO₄) 50% + 10% nitric acid, boiling: 0.4 mm/year
• 2%, boiling: 0.2 mm/year
• 10%, boiling: 0.78 mm/year
• 20%, boiling: 1.35 mm/year
• 50%°C, at 107°C°C: 0.93 mm/year
• 80%°C, at 52°C°C: 0.3 mm/year
• 99%°C, at 130°C°C: 1.08 mm/year
• 99%°C, at 140°C°C: 1.15 mm/year
• 50% + 42g/l Fe₂(SO₄)₃ (ASTM G 28A), boiling: 0.18 mm/year
• 70% + 5% P₂O₅, boiling: 3.33 mm/year
• 60% + 5% P₂O₅, boiling: 1.13 mm/year
• 77% + 8% P₂O₅ + 4% HF°C, at 54°C°C: 0.01 mm/year
• Nitric acid (HNO₃) 18% + 8% HCl°C, at 80°C°C: 0.05 mm/year
• 25% + 11% HCl°C, at 80°C°C: 0.58 mm/year
• 59% + 3% HCl°C, at 80°C°C: 0.13 mm/year

Weldability

Good weldability. The alloy is resistant to HAZ corrosion and hot cracking. Brazing P-number 111, Welding P-number 45, according to ASME Section IX.

Coated electrode - SFA 5.11 / A 5.11; ENiCrMo-11

Coated electrode - SFA 5.14 / A 5.14; ERNiCrMo-11

Heat Treatment, Working and Machining

Recommended work and heat treatment parameters:

• Hot working: 1150-930°C
• Solution-treatment: 1180°C 10-30min; water quench

Cold work requires re-annealing.

Cold work and ageing effect on the hardness of alloy G30:

• Unaged after the cold work:
  • Cold work reduction: 10% - 98 HRB
  • ″: 20% - 29 HRC
  • ″: 30% - 32 HRC
  • ″: 40% - 35 HRC
  • ″: 50% - 36 HRC
  • ″: 60% - 40 HRC
  • ″: 70% - 41 HRC
• Aged 200h at 200°C:
  • Cold work reduction: 10% - 100 HRB
  • ″: 20% - 26 HRC
  • ″: 30% - 34 HRC
  • ″: 40% - 38 HRC
  • ″: 50% - 39 HRC
  • ″: 60% - 43 HRC
  • ″: 70% - 43 HRC
• Aged 100h at 500°C:
  • Cold work reduction: 10% - 93 HRB
  • ″: 20% - 25 HRC
  • ″: 30% - 34 HRC
  • ″: 40% - 40 HRC
  • ″: 50% - 41 HRC
  • ″: 60% - 44 HRC
  • ″: 70% - 46 HRC

We deliver this steel alloy as:

• Plates, strips and sheets according to ASTM B 582 / ASME SB-582
• Rod, bar, wire, forging according to ASTM B 581 / ASME SB-581
• Seamless pipes according to ASTM B 622 / ASME SB-622
• Welded pipes according to ASTM B 619 / ASME SB-619
• Fittings according to ASTM B 366 / ASME SB-366, ASTM B 462 / ASME SB-462
• Forgings according to ASTM B 462 / ASME SB-462

Replacements, equivalents and other designations:

Alloy G30, Allog G-30, N06030, Hastelloy® G-30, ERNiCrMo-11, 2.4603, NiCr30FeMo, ASTM B 366-17 (CRHG30) / ASME SB-366-17 (CRHG30), ASTM B 366-19 (CRHG30) / ASME SB-366-19 (CRHG30), ASTM B 366-19 (WPHG30) / ASME SB-366-19 (WPHG30), ASTM B 462-18e1 (N06030) / ASME SB-462-18e1 (N06030), ASTM B 472-18 (N06030) / ASME SB-472-18 (N06030), ASTM B 474-03 (N06030) / ASME SB-474-03 (N06030), ASTM B 581-17 (N06030) / ASME SB-581-17 (N06030), ASTM B 582-07 (N06030) / ASME SB-582-07 (N06030), ASTM B 619-19 (N06030) / ASME SB-619-19 (N06030), ASTM B 622-17b (N06030) / ASME SB-622-17b (N06030), ASTM B 626-19 (N06030) / ASME SB-626-19 (N06030)