Customization: | Available |
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Application: | Aviation, Electronics, Industrial, Medical, Chemical |
Standard: | JIS, GB, DIN, BS, ASTM, AISI, GOST |
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This grade HN78T XH78T is manufactured with a help of open-type remelt method. This alloy is widely used in industries for manufacturing floating details that are exploited at a temperature range of 1000−1100°C (f. e. in manufacturing of flame tubes, thermocouple cases, combustion chambers etc.) International analogous grades of alloy are marked as 2.4951NiCr20Ti (Germany), GH3030 (PR China). Alloy has main types of mill-products: tube, wire, strip, sheet, rod. Due to high nickel content, it relates to a group of heat-resisting materials. Its main demerit is non-stability to environments that contain sulphur. It causes a brittle behavior. Its oxidation rate is 0,2 mm/h up to a temperature of 1100 °C.
1. Material | Steel Grade | GH3030 KhN78T XH78T ЭИ435 |
Production Process | Available in cold rolled and cold drawn | |
Standard |
GBT-15062 GOST9941ASTM B829 / ASME SB829 |
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2. Diameter of Seamless Pipe | W.T | 1mm-10mm |
Diameter | 20mm thru 630mm | |
Length | 2m-12m, or customer required | |
3.Heat-treated Condition |
Solution and Aging, Annealing, Ausaging, Q+T, etc |
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4. Application |
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5. Packing | *All of our nickel alloy seamless pipes and tubes are packaged according to international standards to prevent any possible damage or loss. By default, we will use thick woven plastic bags to bundle the finished pipes together in batches. For some special pipes and tubes that are vulnerable to dirt, scratches, stress, or rough handling, we will suggest using wooden cases for protection. Please note that wooden cases may incur extra costs not only for the case itself but also for increased freight costs, especially when using air transportation. To enhance customer experience, we also provide dedicated packaging according to your specific requirements." |
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6. Delivery Time | 1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the deposit of T/T |
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7. Trade Terms | EXW,FOB, CFR, CIF etc. | |
8. Payment Terms | 1.30%T/T in advance, the balance against the B/L copy 2.30%T/T in advance, the balance against the L/C at sight |
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9. Loading Port | Ningbo/Wenzhou/Shanghai |
Alloy Grade | C | Si | Mn | P | S | Cr | Ni | Al | Ti | Fe | |
GH3030 XH78T |
MIN | - | - | - | - | 19.0 | Balance | - | 0.15 | - | |
MAX | 0.12 | 0.80 | 0.70 | 0.030 | 0.020 | 22.0 | 0.15 | 0.35 | 1.50 |
Alloy Grade | Tensile Strength min,MPa |
Elongation |
GH3030 / XH78T | 785 | 35% |
Permissible Variations | ||||||
Nominal Outside Diameter, | Outside | Thickness of Specified | Thickness of Specifined | |||
in. (mm) | Diameter, in (mm) | Average Wall, % | Minimum Wall, % | |||
Plus | Minus | Plus | Minus | Plus | Minus | |
Over 0.400(10) to 5/8(16), excl | 0.005(0.13) | 0.005(0.13) | 15 | 15 | 30 | 0 |
5/8(16) to 1 1/2(38), incl | 0.075(0.19) | 0.075(0.19) | 10 | 10 | 22 | 0 |
Over 1 1/2(38) to 3 (76), incl | 0.010(0.25) | 0.010(0.25) | 10 | 10 | 22 | 0 |
Over 3(76) to 4 1/2(114), incl | 0.010(0.38) | 0.010(0.38) | 10 | 10 | 22 | 0 |
Over 4 1/2(114) to 6(152), incl | 0.020(0.51) | 0.020(0.51) | 12.5 | 12.5 | 28 | 0 |
Over 6(162) to 6 5/8(168), incl | 0.025(0.64) | 0.025(0.64) | 12.5 | 12.5 | 28 | 0 |
Over 6 5/8(168) to 8 5/8(219), incl | 0.031(0.79) | 0.031(0.79) | 12.5 | 12.5 | 28 | 0 |
AOvality -The permissible variations in this table apply to individual measurements, incluluding out-of-roundness (ovality) except for the following: For pipe and tube having a nominal wall thickness of 3% or less of the nominal outside diameter, the mean outside diameter shall conform to the permissible variations of this table and individual measurements (including ovality) shall conform to the plus and minus values of the table, with the values increased by 0.5% of the nominal ouside diameter. For pipe and tube over 4 1/2 in. (114 mm) in outside diameter with a nominal wall thickness greater than 3% of the nominal ouside diameter with a nominal wall thickness greater than 3% of the nominal outside diameter, the mean outside diameter shall conform to the permissible variations of this table and individual measurements shall not exceed twice the permissible variations of the table.BEccentricity - The permissible variations in this table to individual measurements including eccentricity. |
Positive Material Identification (PMI) | Guohao Steel can perform PMI testing in house for most stainless steel grades, or we can work with independent labs to complete PMI in order to meet customer specifications. |
Testing | In some cases, HT/ET/UT testing of the stainless steel pipes may be required. We can assist you with this requirement. |