A653 Galvanized Steel

A653 steel is a US standard galvanized steel. The surface has a protective zinc layer, which has excellent corrosion resistance, wear resistance, and long life. Therefore, they are often used in outdoor hardware such as outdoor signs, trash cans, heating and cooling systems, and electrical protection. This standard is applied globally to ensure product consistency.

Wanzhi Steel specializes in the production of A653 steel in different thicknesses, and provides slitting, welding, pre-coating, printing, perforation and other services. The product forms are plates, coils, strips, and tubes. The size can be customized, welcome to contact us for details.

A653 GI Steel Specification

Product Name	A653 Galvanized Steel
Thickness	0.2mm – 6mm
Width	600mm to 2,000mm
Length	Cut to customer specifications
Spangle	Zero spangles, small spangles, regular spangles, big spangles
Zinc Coating	G30, G40, G60, G90
Zinc Layer Thickness	30g/㎡-275 g/㎡
Substrate Type	CS Type A,Type B,Type C; Grades 33, 37, 40, 50, 80
Standard	ASTM A653/A653M
Surface Treatment	Passivation(C), Oiling (O), Lacquer sealing(L), Phosphating(P), Fingerprint-resistant
Certificates	SGS, CE, ISO 9001
MOQ	10 tons
Packaging	Standard export package or as per your requirements
Delivery Time	5-25 working days after payment, mainly depending on order quantity

Strength Grade of A653 GI Steel

Brand	Yield Strength (MPa)	Tensile Strength (MPa)	Typical Uses
CS Type A	≥230	300-450	Lightweight construction, home appliance housings
CS Type B	≥260	330-480	Structural parts, ventilation ducts
DS Type A	≥340	410-550	Load-bearing frames, truck cabins
SS Grade 33	≥230	330-450	High formability requirements (such as stamping)

What is A653 steel?

ASTM A653/A653M is the authoritative standard for “Structural Hot-Dip Galvanized Steel Sheets” published by the American Society for Testing and Materials. It serves not only as the universal specification for construction and manufacturing in North America (United States, Canada, Mexico), but also as the designated requirement for numerous export projects and international engineering initiatives worldwide. It is primarily used in the construction, home appliance, and industrial sectors.

Chemical Composition of A653 Steel (%)

Elements	CS Type A/B	DS Type A/B	SS Grade 33	Notes
C (Carbon)	≤0.10	≤0.15	≤0.10	Low carbon improves weldability
Mn (Manganese)	≤0.60	≤1.35	≤0.60	High manganese enhances strength (DS type)
P (Phosphorus)	≤0.035	≤0.035	≤0.035	The lower the better, to avoid cold brittleness
S (Sulfur)	≤0.035	≤0.035	≤0.035	Control sulfide inclusions
Si (Silicon)	–	–	≤0.03	SS grade requires low silicon to ensure formability

A653 Galvanized (GI) coating weight

Code	Coating weight (double-sided)	Equivalent coating thickness	Typical uses
G90	0.90 oz/ft² (275 g/m²)	20μm	Highly corrosive environments (such as roofs)
G60	0.60 oz/ft² (183 g/m²)	13μm	General buildings, interior parts
G40	0.40 oz/ft² (122 g/m²)	9μm	Lightweight protection

Production and Shipping Video

Comparison with other galvanizing standards

It is an American standard, which is equivalent to the Japanese JIS G 3302, in the meantime, Europe EN 10346. Specifically, It remains a hot-dip galvanized steel sheet with a coating thickness of 0.3 oz/square inch. What’s more, the material has general specifications.

Standard	Coating Type	Features	Applicable regions
ASTM A653	Galvanized (A653)	American standard, focusing on construction and industrial use	North America, export markets
JIS G3302	Galvanized (SGCC)	Japanese standard, with stricter surface requirements	Asia, Japan
EN 10346	Galvanized (DX51D+Z)	European standard, with various post-processing options (such as color coating)	Europe, Middle East

Features of A653 GI Steel

• High corrosion resistance: Zinc coatings range from G30 to G90, offering high corrosion resistance and providing a service life of 20 to 50 years (depending on the environment).
• Excellent formability: Suitable for stamping, bending, welding and other processing (such as SS Grade 33 is designed for deep drawing).
• Various surface qualities: Smooth Finish, Regular Spangle or Minimal Spangle are available.
• Efficient and cost-effective: Lower cost than stainless steel and less maintenance requirements. It is very convenient to clean and maintain, and easy to install and transport.

Typical Applications of A653 Steel

• Construction Sector: Roof panels, wall panels, and purlins for metal building systems; envelope structures for warehouses, factories, and shopping centers.
• HVAC & Piping: Spiral ductwork, rectangular ductwork, and smoke exhaust ducts.
• Appliances & General Manufacturing: Appliance enclosures, cabinets, shelving units, office furniture, and more.
• Infrastructure & Agriculture: Highway guardrails, signage, agricultural buildings, and grain silos.

FAQ About A653 Galvanized Steel

Q1: How should I choose between CS Type A, B, C and SS Grades?

A: If your parts require complex stamping, deep drawing, or multiple bends, select CS Type A/B. If your application is structural, requiring high yield strength to bear loads, and processing involves primarily simple bending, choose SS Grades.

Q2: Can you supply PPGI compliant with ASTM A653 standards?

A: Absolutely. A653 galvanized steel serves as the substrate for producing American-standard pre-painted steel sheets. We are fully capable of manufacturing pre-painted galvanized steel coils meeting ASTM A653 specifications.

Q3: Do you support small-batch orders?

A3: Yes! Our minimum order quantity is 10 tons. We not only supply galvanized steel coils but also have processing equipment to provide galvanized flat steel sheets and galvanized corrugated sheets.

Export Packaging

A653 Galvanized Steel Golden Supplier-Wanzhi Steel

ASTM A653 is the authoritative standard in the field of galvanized steel, taking into account both performance and economy. Whether it is a harsh marine environment or a high-intensity industrial scene, it has become the material of choice for global engineering projects. Choosing the right grade can significantly increase the product life. As a professional supplier, Wanzhi Steel can provide a full range of products that meet the A653 standard and support customized needs.

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