ASTM A792/A792M Galvalume Steel

Specifications

Basic Parameters

Product Name	ASTM A792/A792M Galvalume Steel
Thickness	0.15–4.0mm (commonly 0.3–2.0mm)
Width	600–1500mm
Length	Cut according to customer requirements
Coil inner diameter	508/610mm
Coating	AZ30, AZ35, AZ40, AZ50, AZ55, AZ60, AZ70, etc. (AZ30-AZ150)
Product Type	Coil/Sheet/Strip Coil
Surface Treatment	Passivation, oiling, fingerprint-resistant coating, pre-painting（PPGL）
MOQ	25 tons
Packaging	Standard export packaging (plastic film, moisture-proof paper, and galvanized iron sheet)

Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
CS	205–410	330–550	≥20
DS	140–300	270–420	≥30
FS	220–380	350–520	≥25
HTS	205–450	330–580	≥18

A792 Galvalume Steel Base Material Grades and Designations

1. Commercial Steel: CS (Type A/B/C)
2. Forming Steel: FS
3. Drawing Steel: DS
4. High Temperature Steel: HTS
5. Structural Steel: SS
6. High Strength Low Alloy Steel: HSLAS

Among these, Structural Steel (SS) is further subdivided into multiple grades based on mechanical properties, including Grade 33, Grade 37, Grade 40, Grade 50, and Grade 80.

Equivalent Steels to ASTM A792 Galvalume Steel

ASTM A792M	EN 10346	AS 1397	JIS G 3321
Cs type B Cs type C	DX51D+AZ	G2+AZ	SGLCC
DS	DX52D+AZ	G3+AZ	SGLCD
	DX53D+AZ		SGLCDD
	DX54D+AZ
SS 255	S250GD+AZ	G250+AZ
		G300+AZ	SGLC400
SS 345 Class1	S350GD+AZ	G350+AZ	SGLC440
SS 410 SS 480		G450+AZ	SGLC490
SS 550 Class1	S550GD+AZ	G550+AZ	SGLC570

A792/A792M Galvalume Steel Key Advantages

1. Excellent corrosion resistance: Corrosion resistance is primarily provided by the aluminum-zinc coating on the surface; the aluminum component forms a dense oxide film on the surface, while the zinc component provides electrochemical protection by acting as an anode that corrodes preferentially, thereby protecting the base material.
2. High Heat Resistance: Due to aluminum’s high melting point and the relatively high aluminum content in the surface coating (55.0% aluminum), it can withstand continuous operating temperatures of up to 315°C.
3. High Reflectivity: Aluminum-zinc-coated steel has a thermal reflectivity of up to 75% (thanks to the aluminum content), which allows it to reflect most of the sun’s heat when used as roofing or wall panels in buildings.

A792/A792M Galvalume Steel Applications

When purchasing aluminum-zinc-coated steel products, customers can buy aluminum-zinc-coated steel coils directly, or have them slitted into aluminum-zinc-coated steel strips, cut into flat sheets, or rolled into corrugated sheets for immediate use. We can supply all of these products, which are commonly used by customers in the following applications:

• Construction: As roofing panels and metal wall panels, as well as for ventilation ducts, purlins, and more
• Home Appliance: Refrigerator back panels, air conditioner housings, and control panels for microwaves, ovens, and water heaters.
• Automotive: Mufflers, exhaust pipes, fuel tanks, windshield wiper components, and truck body/chassis parts.
• Other Applications: Due to their high-temperature resistance, these products are often used in chimney pipes, ovens, lighting fixtures, and fluorescent lamp covers.

FAQ

Q1: What is the difference between ASTM A792 and A792M? Can they be procured interchangeably?

A: These two specifications belong to the same standard but use different units of measurement. A792 uses imperial units, while A792M uses metric units; they can be procured interchangeably.

Q2: Can aluminum-zinc-coated steel be used in coastal areas with salt fog and high humidity?

A: Absolutely. Its corrosion resistance is several times that of galvanized steel coils, making it fully suitable for coastal areas, where it also offers a longer service life.

Q3: Which grade in the standard is appropriate for photovoltaic mounting systems, factory roofs, and home appliance casings, respectively?

A: CS (Type A/B/C) is generally used for factory building envelopes; DS is used for home appliance casings and complex stamped parts; SS (Grade 33/37/40/50/80) structural grade is used for photovoltaic mounting systems and load-bearing purlins; and FS formed grade is used for ventilation ducts and simple components.

Q4: Which grade is most suitable for photovoltaic mounting brackets, industrial building roofs, and home appliance casings, respectively?

A: The CS grade is suitable for general factory building envelopes; the DS grade is recommended for home appliance casings and complex stamped parts; the SS structural grade is ideal for solar panel mounts and load-bearing purlins; and the FS forming grade is suitable for ventilation ducts and simple structural components.

Q5: What is the minimum order quantity? What is the lead time for stock items? Can you ensure stable supply for large-volume orders?

A: The minimum order quantity varies by grade but is generally ≥25 tons. To understand why our MOQ is so high, please refer to this article: Why Steel Mills Do Not Accept Small-Volume Orders.

Conclusion

The service life of Galvalume steel depends primarily not on thickness, but on the composition and structure of the coating. Only the right grade can fully unleash the performance of Galvalume steel. Please contact us, and our professional sales managers will recommend the Galvalume steel products best suited for your project.

Why Choose Us?

• With over 15 years of experience, our extensive production and export expertise has earned us a large base of loyal customers.
• We are certified to ISO 9001, ISO 14001, ISO 45001, and CE standards, and have successfully passed all customer-required third-party inspections by SGS (SGS example).
• We always operate with integrity as our guiding principle. With our own testing center, we manufacture products strictly according to customer requirements, consistently exceeding expectations.

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If you have project requirements for galvalume steel coils, please feel free to contact us at any time!