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Name | 1.4562 A31 Hex bolt |
Standard | DIN931/DIN933,ISO4014/ISO4017,ASME B 18.2.1, JIS B1180 |
Size Range | M5-M64 or non-standard as requested |
Finish | Bright&Clean |
Marking | HT&FST or customization |
Material | 1.4562 , ALLOY31 , N08028 |
Grade | Grade 70 |
Certificates | EN10204-3.1B |
Non-standards | OEM is available, according to drawing or samples |
Samples | Samples available |
Package | Bulk in box and then in cartons, then on pallets, or according to customers' requirement. |
| Payment | T/T,Western Union |
1.4562 Alloy31
What material is the Alloy31?
outstanding corrosion resistance in alkaline and acidic halide-containing media
excellent resistance to sulfuric acid, even in highly concentrated form
excellent resistance to corrosion and erosion in phosphoric acid media
outstanding resistance to surface corrosion and local corrosion in chlorine dioxide bleaching plants in paper production
excellent resistance in reducing and oxidizing media as well as in boiling azeotropic nitric acid
Material Designation | 1.4562 |
Alloy | Alloy 31 |
EN Material Symbol | X1NiCrMoCu32-28-7 |
UNS | N08031 |
Trademark | Nicrofer 3127 hMo |
ISO | ISO 15156/MR 0175 |
C | Si | Mn | P | S | Cr |
≤ % | ≤ % | ≤ % | ≤ % | ≤ % | % |
0.015 | 0.3 | 2.0 | 0.02 | 0.01 | 26.0-28.0 |
Mo | Ni | N | Cu | Fe |
% | % | % | ≤ % | |
6.0-7.0 | 30.0-32.0 | 0.15-0.25 | 1.0-1.4 | rest |
This alloy complies with the following major international standards and is suitable for various demanding industrial environments.
European Standards:
DIN Material Designation: 1.4562 – X1NiCrMoCu32-28-7
SEW 400 (Steel and Materials Standards Handbook)
American Standards:
UNS N08031
ASTM: B625 (Plates, Sheets, Strips); B581, B649 (Bars and Rods); B649 (Wires); B564 (Forgings)
ASME: SB625, SB581, SB649 (Pressure vessel applications), approved for pressure vessels up to 800°F (427°C)
International/Industry Standards:
ISO 15156 / NACE MR0175:2003 (Certified for use in sour gas environments in the oil and gas industry, up to Class VI)
API 5LD (for strip products)
This material is listed in the German Federal Institute for Materials Research and Testing (BAM) approved list for containers for the transport and storage of dangerous goods.
Alloy 31 is widely used in the following critical areas:
Flue gas desulfurization (FGD) plant components
Wet phosphoric acid production equipment
Piping and heat exchangers for chloride-contaminated sulfuric acid
Seawater and brackish water pipelines, condensers, and coolers
Sulfuric acid and nitric acid-hydrofluoric acid pickling equipment
Spent sulfuric acid treatment units
Salt evaporation and crystallization equipment
Cellulose and paper industry components
Ore leaching (e.g., HIPAL plants for high-pressure acid leaching of laterite nickel ore)
Petroleum production and refining
Organic acid and ester synthesis
Fine chemicals
Cold-worked transport pipes, feed pipes, continuous oil pipes, steel cables, and flow lines for oil and gas transportation
Exhaust gas scrubbing systems for marine diesel engines
Longitudinally welded pipes for waste incineration power generation
For optimal performance, Alloy 31 should undergo solution annealing within the temperature range of 1150°C to 1180°C (2102°F to 2156°F). Holding time is determined by the thickness of the semi-finished product:
Thickness d ≤ 10 mm (0.39 in): Holding time t = d × 3 min/mm
Thickness d = 10 to 20 mm (0.39-0.79 in): Holding time t = 30 min + (d – 10 mm) × 2 min/mm
Thickness d > 20 mm (0.79 in): Holding time t = 50 min + (d – 20 mm) × 1 min/mm
To achieve maximum corrosion resistance, the workpiece must be rapidly cooled from an annealing temperature of at least 1100°C (2012°F) to 500°C (932°F) at a cooling rate >150°C/min (>302°F/min).
Alloy 31 exhibits outstanding performance in diverse corrosive environments:
Excellent resistance to pitting and crevice corrosion in chloride-containing environments.
Exceptional corrosion resistance to sulfuric acid across a wide concentration range up to 80°C (176°F).
Outstanding resistance to erosion corrosion in phosphoric acid production.
Excellent performance in chlorine dioxide bleaching operations within the pulp and paper industry.
High resistance to intergranular corrosion, with a critical pitting temperature significantly higher than conventional austenitic stainless steels.
Name | 1.4562 A31 Hex bolt |
Standard | DIN931/DIN933,ISO4014/ISO4017,ASME B 18.2.1, JIS B1180 |
Size Range | M5-M64 or non-standard as requested |
Finish | Bright&Clean |
Marking | HT&FST or customization |
Material | 1.4562 , ALLOY31 , N08028 |
Grade | Grade 70 |
Certificates | EN10204-3.1B |
Non-standards | OEM is available, according to drawing or samples |
Samples | Samples available |
Package | Bulk in box and then in cartons, then on pallets, or according to customers' requirement. |
| Payment | T/T,Western Union |
1.4562 Alloy31
What material is the Alloy31?
outstanding corrosion resistance in alkaline and acidic halide-containing media
excellent resistance to sulfuric acid, even in highly concentrated form
excellent resistance to corrosion and erosion in phosphoric acid media
outstanding resistance to surface corrosion and local corrosion in chlorine dioxide bleaching plants in paper production
excellent resistance in reducing and oxidizing media as well as in boiling azeotropic nitric acid
Material Designation | 1.4562 |
Alloy | Alloy 31 |
EN Material Symbol | X1NiCrMoCu32-28-7 |
UNS | N08031 |
Trademark | Nicrofer 3127 hMo |
ISO | ISO 15156/MR 0175 |
C | Si | Mn | P | S | Cr |
≤ % | ≤ % | ≤ % | ≤ % | ≤ % | % |
0.015 | 0.3 | 2.0 | 0.02 | 0.01 | 26.0-28.0 |
Mo | Ni | N | Cu | Fe |
% | % | % | ≤ % | |
6.0-7.0 | 30.0-32.0 | 0.15-0.25 | 1.0-1.4 | rest |
This alloy complies with the following major international standards and is suitable for various demanding industrial environments.
European Standards:
DIN Material Designation: 1.4562 – X1NiCrMoCu32-28-7
SEW 400 (Steel and Materials Standards Handbook)
American Standards:
UNS N08031
ASTM: B625 (Plates, Sheets, Strips); B581, B649 (Bars and Rods); B649 (Wires); B564 (Forgings)
ASME: SB625, SB581, SB649 (Pressure vessel applications), approved for pressure vessels up to 800°F (427°C)
International/Industry Standards:
ISO 15156 / NACE MR0175:2003 (Certified for use in sour gas environments in the oil and gas industry, up to Class VI)
API 5LD (for strip products)
This material is listed in the German Federal Institute for Materials Research and Testing (BAM) approved list for containers for the transport and storage of dangerous goods.
Alloy 31 is widely used in the following critical areas:
Flue gas desulfurization (FGD) plant components
Wet phosphoric acid production equipment
Piping and heat exchangers for chloride-contaminated sulfuric acid
Seawater and brackish water pipelines, condensers, and coolers
Sulfuric acid and nitric acid-hydrofluoric acid pickling equipment
Spent sulfuric acid treatment units
Salt evaporation and crystallization equipment
Cellulose and paper industry components
Ore leaching (e.g., HIPAL plants for high-pressure acid leaching of laterite nickel ore)
Petroleum production and refining
Organic acid and ester synthesis
Fine chemicals
Cold-worked transport pipes, feed pipes, continuous oil pipes, steel cables, and flow lines for oil and gas transportation
Exhaust gas scrubbing systems for marine diesel engines
Longitudinally welded pipes for waste incineration power generation
For optimal performance, Alloy 31 should undergo solution annealing within the temperature range of 1150°C to 1180°C (2102°F to 2156°F). Holding time is determined by the thickness of the semi-finished product:
Thickness d ≤ 10 mm (0.39 in): Holding time t = d × 3 min/mm
Thickness d = 10 to 20 mm (0.39-0.79 in): Holding time t = 30 min + (d – 10 mm) × 2 min/mm
Thickness d > 20 mm (0.79 in): Holding time t = 50 min + (d – 20 mm) × 1 min/mm
To achieve maximum corrosion resistance, the workpiece must be rapidly cooled from an annealing temperature of at least 1100°C (2012°F) to 500°C (932°F) at a cooling rate >150°C/min (>302°F/min).
Alloy 31 exhibits outstanding performance in diverse corrosive environments:
Excellent resistance to pitting and crevice corrosion in chloride-containing environments.
Exceptional corrosion resistance to sulfuric acid across a wide concentration range up to 80°C (176°F).
Outstanding resistance to erosion corrosion in phosphoric acid production.
Excellent performance in chlorine dioxide bleaching operations within the pulp and paper industry.
High resistance to intergranular corrosion, with a critical pitting temperature significantly higher than conventional austenitic stainless steels.
