GNEE STEEL has a complete production line from vacuum melting, electroslag remelting, forging, heat treatment, to machining. It specializes in the production of special alloy materials, which are widely used in nuclear power engineering, aerospace, petrochemical, desulfurization in power plants, shipbuilding, machinery, communications, and electronics. The products are designed for use in environments with special requirements such as high temperature, high pressure, corrosion, wear, fatigue, and creep, providing scientific solutions and excellent product services from a materials perspective.
Typical Steel Grades:
Hastelloy Alloys: N10001, N10002, N10276, N06002, N06022, N10665, N10675, etc.
High-temperature Alloys: GH4169, GH3030, GH3039, GH4145, GH2132, GH3128, GH3044, GH3536, GH4033, etc.
Corrosion-resistant Alloys: NS312, NS334, NS333, NS321, NS322, NS336, NS313, NS143, NS142, NS111, NS112, etc.
Nickel-based Alloys: N06600, N06625, N06601, N06617, N08020, N06690, N07750, N08926, N08925, N08367, N08904, etc.
Monel Alloys: N04400, N05500, etc.
Precision Alloys: 4J36, 4J29, 1J79, 1J85, 1J17.
Special Materials: 17-4PH, 17-7PH, 15-5PH, S31254, 253MA, XM-19, XM-18, S21800.
Nuclear-grade Stainless Steel and Duplex Stainless Steels: 304(L), 316(L), 2205, 2304, 2507, etc.
Alloy Steel Products and Specifications
| Forms | Description | Dimensions (mm) |
| Bars | Black Round Steel | Φ50-250, L: 1000-4000 |
| Machined Round Steel | Φ60-250, L: 800-1500 | |
| Hot-rolled Round Steel | Φ20-50, L: 2000-5000 | |
| Cold-drawn Round Steel | Φ4-20, L: 2000-5000 | |
| Flanges | Provides products according to ASME B16.5, HG 20615 standards. | |
| Plates | Hot-rolled Plates | Thickness: 4.5-36, Width: 650-2000, Length: 1000-6000 |
| Cold-rolled Plates | Thickness: 0.8-4.5, Width: 650-1200, Length: 800-3000 | |
| Pipes | Seamless Pipes | Outer Diameter: 6-273, Wall Thickness: 1-30, Length: 1000-8000 |
| Welded Pipes | Customizable according to customer requirements | |
| Pipe Fittings | Pipe-formed Fittings | Provides most fittings according to ASTM B16.9 |
| Forged Fittings | Provides most fittings according to ASTM B16.11 | |
| Wire & Strip | Hot-rolled Wire | Φ5.5-25, Supplied as coils or straight bars |
| Cold-rolled Strip | Φ0.8-15, Supplied as coils or in rolls |
ASTM Specifications
 |
UNS | Pipes | Plates | Bars | Strip (Bar) Material | (Welding)Wires | Forgings | |
| Seamless Pipes | Welded Pipes | |||||||
| Alloy 200 | NO2200 | B161/B163 | B725/B730 | B162 | B160 | B162 | ||
| Alloy201 | N02201 | B161/B163 | B725/B730 | B162 | B160 | B162 | ||
| Monel 400 | N04400 | B161/B163 | B127 AMS 4544 | B164 AMS 4675/4730 |
B564 | |||
| Hastelloy X | N06002 | B622 AMS | B619/B622 | B435 AMS 5536 | B572 AMS 5754 | B435 | ||
| 5587/5588 | AMS 5588 | |||||||
| Hastelloy C22 | N06022 | B622 | B619/B626 | B575 | B574 | B575 | B564 | |
| Inconel 602CA | N06025 | B163/B167 | B516/517 B546 |
B168 | B166 | B168 | B166 | B564 |
| Inconel 600 | N06600 | B163/B167 5580 | B163/516/517 AMS 5580 |
B168 AMS 5540 | B166 AMS 5665 | B168 AMS 5540 | B166 | B564 |
| Inconel 601 | N06601 | B163/B167 AMS 5580 |
B168 AMS 5870 | B166 | B168 | B166 | B564 | |
| Inconel 625 | N06625 | B444 AMS5581 |
B704/B705 AMS 5581 |
B443 AMS 5599 | B446 AMS 5666 | B443 AMS 5599 | B564 | |
| Nimonic 80A | N07080 | B637 | B637 | |||||
| Inconel 718 | N07718 | AMS5589/5590 | B670 AMS | B637AMS | B670AMS | B637 | ||
| Inconel X750 | N07750 | AMS5582/5583 | AMS | AMS 5542/5598 | B637 AMS 5667/5670/5671 |
AMS5542/5598 | B637 | |
| 5582/5583 | ||||||||
| Alloy 20 | N08020 | B729 | B464 B468/B474 |
B463 | B472/B473 | B463 | B471 B473/B475 |
B462 |
| Alloy 28 | N08028 | B668 | B709 | |||||
| Alloy 31 | N08031 | B622 | B619/B626 | B625 | B581/B649 | B625 | B649 | B564 |
| Incoloy 800 | N08800 | B163/B407 | B163 | B409AMS 5871 | B408 | B409 AMS 5871 | B564 | |
| Incoloy 800H | N08810 | B163/B407 | B514 | B409 AMS 5871 | B408 | B409 AMS 5871 | B564 | |
| Incoloy 800HT | N08811 | B163/B407 | B515 | B409 AMS 5871 | B408 | B409 AMS 5871 | B564 | |
| Incoloy 825 | N08825 | B163/B423 | B163 B704/B705 |
B424 | B425 | B424 | ||
| 904L | N08904 | B677 A269/A312 |
B673/B674 A249/A312 | B625 A240/A480 | B649/A479 | B625 A240/A480 | B649/A479 | A484 |