High performance alloy and alloy steel bolts, used in harsh environments such as high temperature, high pressure or corrosion and applied according to EN 10269 standard. AD2000, ADW, PED 97/23 EC, PED 2014/68/EU, EN 10204-3.1

Bolt: 1.7709 / 21CrMoV5-7+QT: Low alloy steel bolts with chromium, molybdenum and vanadium, quenched and tempered for added strength.

High tensile strength (900-110Mpa) good fatigue resistance, high temperature resistance (500°C).

Application: commonly used for pressure vessels, steam turbines and power generation equipment, especially in high temperature environments such as boilers and pipelines.

Bolt 1.7225 / 42CrMo4+QT: Is a Chromium-molybdenum alloy steel that is quenched and tempered to achieve high strength and toughness.

Excellent mechanical properties with tensile strength from 1000-1200Mpa, good wear resistance, impact resistance and good load bearing.

Application: Bolts in heavy machinery, wind turbines, high load bearing structures.

Bolt 1.4923/X22CrMoV12-1+QT2: Is a type of bolt made from martensitic stainless steel with chromium, molybdenum and vanadium, quenched and tempered for use at high temperatures.

High strength about 900-1100Mpa, good corrosion resistance, good fatigue resistance at temperatures up to 600°C, good oxidation resistance and very good thermal fatigue resistance.

Applications: Bolts for turbines, jet engines, and high-temperature pressure vessels in the aerospace industry...

2.4668 / Alloy 718 / Inconel 718: Is a nickel-based superalloy bolt (Ni-Cr-Fe) with Niobium and molybdenum, the outstanding advantage is high temperature resistance.

Mechanical properties: Superior strength (~1200-1400 MPa), excellent corrosion resistance, good fatigue resistance up to ~700°C. Maintain properties in cryogenic conditions.

With EN 10269 Used for nickel alloy bolts in high temperature and corrosion applications

2.4952 / NiCr20TiAl: Is a nickel-chromium alloy (Alloy 80A) with titanium and aluminum for increased hardness, high temperature resistance

Properties: High tensile strength (~1000-1200 MPa), good fatigue and oxidation resistance up to ~815°C. Good fatigue resistance.

EN 10269: For nickel alloy bolts in high temperature environments, especially in aerospace.

2.4856 / Alloy 625 / Inconel 625: Is a nickel-chromium-molybdenum alloy bolt with niobium, outstanding for corrosion resistance and strength.

Properties: High strength (~900-1100 MPa), resistant to pitting, crevice corrosion, and oxidation to ~980°C. Excellent in seawater and acidic environments.

1.4501 / SUPERDUPLEX F55: Is a super duplex stainless steel bolt with a balanced austenitic-ferritic structure, providing high strength and corrosion resistance.

Properties: Very high tensile strength (~800-1000 MPa), resistant to stress corrosion cracking, pitting, and chloride environments.

ASTM A193 gr b7 bolts are for medium to high temperature applications. The bolt material has a minimum tensile strength of 125ksi and a minimum yield strength of 105ksi.

BASIC THREAD FORMS:

METRIC: Metric thread, a common global standard:

- Metric fine / Metric coarse

UN: Unified National thread, a standard mainly in the US and Canada:

- UNC (Unified National Coarse)

- UNF (Unified National Fine)

- UNS (Unified National Special)

WHITWORTH: Whitworth thread system, an old British standard, rarely used today:

- BSW (British Standard Whitworth)

- BSF (British Standard Fine)

BOLT SURFACE COATING:

Plating methods to ensure aesthetics, durability, improve surface properties and corrosion resistance.

Galvanizing: Electroplated or hot-dip galvanized zinc coating, protects steel from corrosion.

Application: Bolts in construction, automotive, and not too harsh outdoor environments.

Advantages: Low cost, good corrosion resistance under normal conditions.

Zinc Nickel Plating: Electroplated zinc-nickel alloy, containing 10-15% nickel, providing superior corrosion resistance.

Application: Bolts in the automotive, aerospace, and chemical or salt environments.

Advantages: Higher corrosion resistance than conventional galvanizing, good heat resistance.

Hot-dip galvanizing: Dip steel parts into molten zinc, creating a thick zinc coating.

Application: Bolts for bridges, steel structures, and outdoor structures exposed to harsh weather.

Advantages: Thick, long-lasting coating, excellent corrosion resistance.

PTFE, Xylan, Xylar, Phosphate, Cadmiu, Sheradizing,

As a supplier of anchor bolts, stud bolts come in a variety of sizes such as ASTM A193 standard B7 up to 2 ½ inches. Threaded rods from M10 to M64 have standard thread pitches UNC and 8UN. In addition, high-strength metric bolts are also used in household, industrial and commercial applications that require high temperature operation because the material has strong corrosion resistance because they contain carbon, manganese, phosphorus, sulfur, silicon, chromium, and molybdenum.

Apmetal is a leading partner in providing heat-resistant and acid-resistant bolts for the automotive, oil and gas, energy, aerospace, and chemical industries in Vietnam. If you have a need for any other type of bolt, please contact us immediately for the best consulting support.