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ASTM B444 Gr.625 Seamless Nickel Alloy Steel Pipe Annealed Inconel 625 Tube

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xProduct Name | Alloy Steel Pipe | Grade | Inconel 625 |
---|---|---|---|
Standard | ASTM,ASME,API | Type | Hot Rolled,Cold Drawn,NPS |
Pipe End | Plain End,Beveled End,Treaded | ||
High Light | Gr.625 Nickel Alloy Steel Pipe,ASTM B444 Nickel Alloy Steel Pipe,Seamless Inconel 625 Tube |
ASTM B444 Gr.625 Seamless Nickel Alloy Steel Pipe Annealed Inconel 625 Tube
Alloy 625 nickel pipe is made from a nickel-chromium-molybdenum alloy with an addition of niobium. High strength and toughness from cryogenic temperatures to 1800°F. Good oxidation resistance, exceptional fatigue strength, and good resistance to many corrosives.
Typical applications include chemical processing, aerospace and marine engineering, pollution control equipment, and nuclear reactors.
GRADE
Standard | Low-Alloy Steel Grade |
ASTM A335 |
P1 P2 P5 P5b P5c P9 P11 P12 P15 P21 P22 P91 P92 |
INCONEL 625 CHEMICAL COMPOSITION
Element | C | Mn | Si | P | S | Cr | Mo |
Inconel 625 | 0.10~0.20% | 0.30~0.80% | 0.10~0.50% | 0.025% | 0.025% | - | 0.44~0.65% |
P12 | 0.05~0.15% | 0.30~0.60% | 0.50% | 0.025% | 0.025% | 0.8~1.25% | 0.44~0.65% |
P15 | 0.05~0.15% | 0.30~0.60% | 1.15~1.65% | 0.025% | 0.025% | - | 0.44~0.65% |
P21 | 0.05~0.15% | 0.30~0.60% | 0.50% | 0.025% | 0.025% | 2.65~3.35% | 0.80~1.60% |
P22 | 0.05~0.15% | 0.30~0.60% | 0.50% | 0.025% | 0.025% | 1.9~2.6% | 0.87~1.13% |
P91 | 0.08~0.12% | 0.30~0.60% | 0.20~0.50% | 0.02% | 0.01% | 8.0~9.0% | 0.85~1.05% |
P92 | 0.07~0.13% | 0.30~0.60% | 0.50% | 0.02% | 0.01% | 8.5~9.5% | 0.30~0.60% |
ALLOYING ELEMENTS
The addition of Molybdenum (“Moly”) increases the strength of the steel and its elastic limit, enhance the steel resistance to wear, its impact qualities, and the hardenability. It also improves the resistance to softening, makes chromium steel less prone to embrittlement and prevents pitting.
Chromium, a key element also for stainless steel alloys, prevents steel oxidation at elevated temperatures and increases the resistance of steel to corrosion. It enhances the tensile, yield, and hardness properties of low-alloy pipes at room temperatures.
Other alloying elements, present in various degrees in pipes of all grades are:
- Aluminum: decreases oxygen from steelmaking
- Boron: used to produce fine grain size and enhance steel hardness
- Cobalt: used to enhance the steel’s heat and wear-resistance
- Manganese: gives better steel hardenability
- Nickel: Enhances toughness, hardenability and impact strength at low temperatures
- Silicon: decreases oxygen, enhances hardenability and toughness
- Titanium: prevents precipitation of chromium carbide
- Tungsten: refines steel grain size and enhance the steel hardness, especially at high temperatures
- Vanadium: gives steel enhanced fatigue resistance
As mentioned, low-alloy steels have a total amount of alloying elements below 5%; high alloy steel has a higher percentage of these elements.