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Heat Exchanger Tube

ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube Alloy 625 Seamless Tube

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ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube Alloy 625 Seamless Tube

Brand Name:	Yuhong
Model Number:	ASTM B444 UNS N06625 Nickel Alloy Seamless Tube
MOQ:	500kgs
Price:	Negotiable
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Payment Terms:	TT, LC

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

China

Certification:

ABS, BV, DNV, CCS, LR

Product Name:

Heat Exchanger Tube

Standard:

ASTM B444, ASME SB444

Material:

UNS N06625, INCONEL 625, DIN 2.4856

OD:

1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", Etc.

WT:

BWG 25, 22, 20, 18 ... 10

Length:

Fixed Length, Random Length

Application:

Heat Exchanger, Cooling , Heating, Condenser, Tube Bundle

Highlight:

ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube, Alloy 625 Seamless Tube

Product Description

ASTM B444 UNS N06625 Grade 1 Nickel Alloy Steel Seamless Tube Alloy 625 Heat Exchanger Tube

ASTM B444 UNS N06625 (Alloy 625) Seamless Heat Exchanger Tube is a weld‑free, nickel‑chromium‑molybdenum‑columbium tube manufactured and tested to the ASTM B444 standard. It is specifically designed for heat exchanger service, offering outstanding corrosion resistance (especially in seawater/acids), high strength, and thermal stability. The term excludes “steel” – it is a nickel superalloy, not a steel product.

The key advantages of ASTM B444 UNS N06625 (Alloy 625) seamless heat exchanger tubes, explained simply:

Outstanding corrosion resistance – Handles seawater, acids, and chlorides without rusting or pitting.
High strength – Stronger than stainless steel, even at high temperatures (up to ~650°C / 1200°F).
No weld seams – Seamless construction means no weak points or weld-related corrosion.
Resists stress cracking – Won't crack from chloride stress corrosion (a common problem with 300-series stainless steel).
Easy to fabricate – Can be bent, rolled, expanded into tube sheets, and welded without special difficulty.

Equivalent Grade of ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube

Grade	UNS No	Old British		Euronorm		GOST	Japanese JIS
		BS	En	No	AFNOR
Inconel 625	N06625	NA 21	NiCr22Mo9Nb	2.4856	NC22DNB4M	ХН75МБТЮ	NCF 625

Chemical Composition of ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube

Grade		C	Mn	Si	Fe	S	Cr2	Al-Ti	Ni
625	min.	–	–	–	–	–	20.0	–	58.0
625	max.	0.10	0.50	0.50	5.0	0.015	23.0	0.40	–

Mechanical Properties of ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
625	Psi – 1,35,000 , MPa -930	Psi – 75,000 , MPa – 517	42.5	–	–

Application:

1. Offshore Oil & Gas Platforms

2. Chemical & Petrochemical Processing

3. Marine & Desalination

4. Power Generation

5. High-Temperature Heat Exchangers (Up to ~650°C / 1200°F)

6. Pollution Control & Scrubbers

7. Specialty & Corrosive Acid Production

ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube Alloy 625 Seamless Tube 0

Ratings & Review

Overall Rating

4.3

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

33%

4 stars

67%

3 stars

2 stars

1 stars

All Reviews

Ahmed Al-Rashid

Kuwait Mar 3.2026

Helpful (2)

Tube ends were clean, dimensions consistent. Our crew didn't run into fit-up issues.

Kenneth Tan

Singapore Feb 25.2026

Helpful (3)

With our humidity and year-round high temps, corrosion resistance and heat transfer are always a concern. These tubes have been performing nicely.

Rashid

United Arab Emirates Dec 10.2025

Helpful (2)

Good oxidation resistance, matches well with the T9. No scaling or thinning noticed.

Tags:

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Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

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Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

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Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube