Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements3 elements | |||
| Ni | Nickel | Bal. | |
| Cr | Chromium | 19 – 22% | |
| Ti | Titanium | 0.15 – 0.35% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual9 elements | |||
| Al | Aluminium | ≤ 0.15% | |
| Fe | Iron | ≤ 1% | |
| C | Carbon | ≤ 0.12% | |
| Mn | Manganese | ≤ 0.7% | |
| Si | Silicon | ≤ 0.8% | |
| Cu | Copper | ≤ 0.2% | |
| P | Phosphorus | ≤ 0.015% | |
| S | Sulphur | ≤ 0.01% | |
| Pb | Lead | ≤ 0.001% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Plate, sheet and strip | |||||
| Hot-rolled plate | As delivered (solution treated 980–1020 °C, air cooled) | ≥ 685 | — | ≥ 30 | Tensile at 700 °C: tensile strength ≥ 295 MPa, elongation ≥ 30 %. |
| Cold-rolled sheet | As delivered (solution treated 980–1020 °C, air cooled) | ≥ 685 | — | ≥ 30 | Tensile at 700 °C: tensile strength ≥ 295 MPa, elongation ≥ 30 %. Grain size No. 5 or finer. |
| Strip, t >0.25 mm | As delivered (solution treated 980–1020 °C, air cooled) | ≥ 685 | — | ≥ 30 | Grain size No. 5 or finer. |
| Strip, t ≤0.25 mm | As delivered (solution treated 980–1020 °C, air cooled) | ≥ 615 | — | — | Elongation is measured and reported, not an acceptance criterion. Grain size No. 5 or finer. |
| Flat products (a ≤75 mm), bar (d ≤160 mm) and rod (d ≤25 mm) | Solution annealed, AT | 650 – 850 | ≥ 240 | ≥ 30 | Hardness ≤230 HB also applies. These rows are for the near-equivalent EN 2.4951 (Nimonic 75), for comparison only. |
| Several forms | |||||
| Flat products, bar and rod | Solution annealed (guidance) | — | — | — | Also specified: Heat treatment 1000–1050 °C, water quench or sufficiently rapid air cool |
| Other | |||||
| Heat-resisting service in air | Guidance values | — | — | — | |
Creep behaviour
Guidance values (MPa) — Mean values of a scatter band. They are neither an acceptance requirement nor a design allowable stress. Figures in parentheses are long-term extrapolations and less reliable than the tested range.
| Temp °C | Rupture strength Ru | ||
|---|---|---|---|
| 1 000 h | 10 000 h | 100 000 h | |
| 600 | — | 100 | 68 |
| 700 | — | 36 | 23 |
| 800 | 37 | 17 | 11.5 |
| 900 | 20 | 10 | 7 |
| 1000 | 11 | 6 | 5 |
Pressure design must take allowable stresses from the governing code (EN 13445, ASME and the like).
⚠ This is REFERENCE data, not data for GH3030 itself. GH3030 is commonly cross-referenced to EN 2.4951 (NiCr20Ti, Nimonic 75). A contract requiring certification to GH3030 must be checked item by item against the Chinese standard.
⚠ Rupture data only — there are no 1 % creep-elongation strength figures for this grade.
⚠ There are no 1 000 h values at 600 and 700 °C: at those temperatures the alloy does not rupture by creep within 1 000 h. All three times are populated from 800 °C upwards.
⚠ The maximum application temperature in air, Tₐ = 1 150 °C, is an oxidation criterion, not a load-bearing one. It means the metal loss from scaling does not exceed 1 g/(m²·h) at Tₐ, and does not exceed 2 g/m² on average at Tₐ + 50 °C over 120 h with four intermediate coolings. Set that against the table above: at 1 000 °C and 100 000 h the rupture strength is 5 MPa. Resisting oxidation to 1 150 °C and carrying load at 1 150 °C are entirely different propositions.
Where this grade is recommended
Matched in 2 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Furnace internals & fixtures | Furnaces & Vacuum | 900 – 1150 °C | 8 / 12 | 84 |
| Exhaust & afterburner | Aerospace | 700 – 950 °C | 7 / 8 | 82 |
Designations & equivalents
| W.Nr. (Germany) | ≈ 2.4951 |
| EN designation | ≈ NiCr20Ti |
| Trade name(s) | ≈ Nimonic 75 |
| GOST (Russia) | ≈ ХН78Т (ЭИ435) |
The data on this page are for the European grade 2.4951 (NiCr20Ti), a near-equivalent of GH3030.
More detail 1
If GH3030 must be accepted to the Chinese standard, say so in your enquiry.
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
3 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is GH3030?
GH3030 — Ni superalloys. Combustor sheet — equivalent to Nimonic 75
What is the maximum service temperature of GH3030?
Typically about 1150 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of GH3030?
The specified minimum tensile strength is 685 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover GH3030?
GB/T 14995 (wrought superalloys — hot-rolled plate), GB/T 14996 (wrought superalloys — cold-rolled sheet and strip), EN 10095 (reference grade 2.4951)
Where is GH3030 typically used?
Furnace internals & fixtures (Furnaces & Vacuum); Exhaust & afterburner (Aerospace)
In which forms is GH3030 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
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