What are the differences between Inconel 600/625 alloy sheets?

The main difference between Inconel 600 and 625 plates lies in their composition, which results in significantly different performance characteristics: Inconel 625 (N06625) contains higher levels of chromium, molybdenum, and niobium, giving it excellent corrosion resistance (especially in marine/acidic environments) and strength, making it ideal for demanding chemical/aerospace applications; Inconel 600 (N0600) contains higher levels of nickel, lower levels of chromium, and no molybdenum, thus offering good high-temperature strength and oxidation resistance, making it suitable for furnace components and heat exchangers, and more economical in applications where corrosion requirements are less stringent.

Can Inconel 625 be hardened?

We measured the hardness of the nickel-based superalloy Inconel 625 after aging at 625, 700, and 760°C for 1 to 335 hours. The results show that peak hardening occurs much earlier at 760°C than at 700°C. Furthermore, the peak hardness at 700°C is also higher than that at 760°C.

Inconel 600 sheet metal is a plate material rolled from a high-performance nickel-chromium-iron alloy (Inconel 600), renowned for its excellent strength retention at temperatures up to approximately 1150°C, as well as its superior resistance to oxidation and chloride stress corrosion cracking. It is specifically designed for manufacturing linings, heat exchanger components, furnace structures, and reaction vessels for equipment requiring tolerance to extreme high temperatures and corrosive environments. It is a critical basic material in chemical, nuclear power, heat treatment, and aerospace industries, handling harsh conditions with performance far exceeding that of ordinary stainless steel, but its cost and processing difficulty are correspondingly higher.

Inconel 625 sheet metal is a nickel-chromium-based superalloy sheet metal strengthened with molybdenum and niobium. Its core value lies in its comprehensive and superior corrosion resistance, effectively resisting pitting corrosion, crevice corrosion, chloride stress corrosion cracking, and oxidizing and reducing acid media, while also possessing excellent high-temperature strength (to approximately 980°C) and creep resistance. It provides reliable solutions for applications such as marine engineering, harsh chemicals, flue gas desulfurization systems, and aerospace, where sheet metal is required as structural components, containers, or liners in extreme corrosive and high-temperature environments. It is a top-tier engineering material with overall performance superior to Inconel 600 sheet metal.

Specification of Inconel 600/625 Sheets & Plates :

Specifications:	ASTM B168 / ASME SB168
Thickness:	4 mm To 100 mm
Length:	2000mm, 2438mm, 3000mm, 5800mm, 6000mm,12000mm,or as required
Width:	40mm-600mm, 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm,or as required
Grade	600/625
Application	Building industry,architectural decoration,elevators,building doors,panels and so on.
Standard:	ASTM,AISI,JIS,GB, DIN,EN
Surface:	BA,2B,NO.1,NO.4,4K,HL,8K
Certification:	ISO, SGS,BV
Technique:	Cold Rolled Hot Rolled
Finish	Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Form	Sheets, Plates, Coils, Slatting Coils, Perforated Coils

Equivalent Grades of Inconel 600/625 Alloy Sheets:

STANDARD	UNS	WERKSTOFF NR.	AFNOR	GOST	OR	BS	JIS	EN
Inconel 600	N06600	2.4816	NC15FE11M	МНЖМц 28-2,5-1,5	ЭИ868	NA 13	NCF 600	NiCr15Fe
Inconel 625	N06625	2.4856	NC22DNB4M	ХН75МБТЮ	ЭИ602	NA 21	NCF 625	NiCr22Mo9Nb

Chemical Composition of Alloy 600/625 Plates :

Grade	Ni	Fe	C	Mn	Si	Cu	Cr	S	Mo	Co	Al	Ti	Nb
600	72.0 min	6.0 - 10.0	0.15 max	1.0 max	0.5 max	0.5 max	14.0 - 17.0	0.015 max	-	-	-	-	-
601	58.0 – 63.0	Balance	0.10 max	1.0 max	0.50 max	1.0 max	21.0 – 25.0	0.015 max	8.0-10.0	-	1.0 – 1.7	-	-
625	58.0 max	5.0 max	.10 max	.50 max	.50 max	-	20.0 - 23.0	.015 max	8.0 - 10.0	1.0 max	.40 max	.40 max	3.15 - 4.15
718	50 - 55	-	0.08 max	0.35 max	0.35 max	0.3 max	17 - 21	.015 max	2.8 - 3.3	1.0 max	-	-	-

Mechanical Properties of Inconel 600/625 Alloy Sheets & Plates :

Mechanical properties	Tensile, min, ksi[MPa]	Yield, min, ksi[MPa]	Elongation, %(min)
Inconel 600	80[550]	35[240]	30
Inconel 625	100[690]	40[276]	30

Strength: The yield strength and tensile strength of 625 steel plate are much higher than those of 600 steel plate.

Toughness: 625 steel plate is tougher and has better ductility.

Inconel 600 and Inconel 625 Plate Corrosion Resistance

600 Plate: Good, but limited performance in corrosive media.

625 Plate: Due to its molybdenum/niobium content, it exhibits excellent corrosion resistance in a variety of corrosive media, including seawater, acidic (such as oxalic acid), and chloride environments.

Why Choose Gnee as Your Nickel-Based Alloy Supplier

✅ Over 18 years of export experience, products sold to more than 80 countries

✅ Certified by ISO, SGS, and BV

✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars

✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging

✅ Fast delivery within 7-15 days, supported by global logistics partners

📦 Packaging and Shipping

All stainless steel products are packaged using the following methods:

Wooden pallets or crates

Moisture-proof packaging

Labels with furnace number, standard, and size labels

Shipped worldwide by sea, air, or express