High Tensile Strength Steel

-- Steady & Reliable Manufacturer --

Introduction

High Tensile Strength Steel is material specially engineered to possess a significantly higher yield strength (measured in MPa) than commercial grade steel. This allows for the use of thinner, lighter gauge material while maintaining the required structural load-bearing capacity. Our high tensile steel (typically G350, G450, or G550 grades) is supplied as galvanized (GI) or Galvalume (GL), offering combined structural efficiency and corrosion resistance. Using high tensile steel is critical for achieving large spans, reducing structural weight, and ultimately lowering construction costs without sacrificing safety.

The most common application is in roofing, where G550 grade allows for very light, durable sheeting.

Specifications

Parameter	Value/Range
Yield Strength (ReH)	Minimum 350 MPa to 550 MPa (G350, G450, G550)
Ultimate Tensile Strength (Rm)	Minimum 420 MPa to 570 MPa
Thickness Range	Commonly 0.25mm to 1.5mm
Standards	ASTM A653, AS 1397, JIS G3302
Substrates	GI (Galvanized), GL (Galvalume), PPGI, PPGL
Ductility	Reduced formability compared to soft steel (CQ grade).
Certification	Full Mill Test Certificate (MTC) required for strength verification.

Structural Safety: The specified grade (e.g., G550) confirms the minimum yield strength, which is the point at which the material begins to deform permanently.

Application

Structural Roofing: Long-span corrugated and trapezoidal roofing profiles (G550).
C- & Z-Purlins: Secondary framing members that carry high wind and snow loads (G350, G450).
Steel Decking: Composite floor systems requiring high initial strength.
Light Steel Framing: Studs and tracks for pre-fabricated building systems.

Advantages

Material Cost Reduction: Achieves the same structural performance with less material volume (thinner gauge).
Reduced Dead Load: Lighter structures require smaller foundations and primary support members.
Improved Handling: Lighter coils and sheets are easier and faster to handle and install on site.
Superior Impact Resistance: Provides greater stiffness and resistance to local damage compared to soft steel of the same gauge.

Payment & Shipping

Traceability: Every coil is traceable to the MTC, confirming the precise yield strength achieved during rolling.
Processing: High tensile coils require specialized, high-capacity roll forming equipment to prevent spring-back and ensure accurate profiling.
Documentation: Essential for building code compliance and structural engineering sign-off.

Frequently Asked Questions

Q: Can G550 steel be easily deep drawn or stretched?
A: No. High tensile steel has low ductility. It is suitable for bending and roll-forming but not for complex deep-drawing or stretching operations like making appliance casings, which require soft Commercial Quality (CQ) steel.

Q: Does the metallic coating (GI/GL) affect the tensile strength?
A: No, the coating is a surface treatment and does not affect the inherent mechanical properties (tensile strength, yield strength) of the base steel.

CONTACT WITH US

Zhejiang Tiannv Color Steel Co., Ltd.

Enjoying good reputation from all the customers worldwide, we are the reliable partner you can trust in China.

Zhejiang Tiannv Color Steel Co., Ltd was established in January 2003, located in Zhejiang Province, which is a Sino-Hong Kong joint venture with a registered capital of 50 million RMB. As China High Tensile Strength Steel Manufacturers and High Tensile Strength Steel Factory, the company covers an area of 50000㎡, and a workshop area of 12000㎡. Company’s main products are hot galvanized steel coil, aluzinc coil, prepainted steel coils (PPGI / PPGL), prepainted aluminum coil, printed PPGI for household appliance, roofing/corrugated PPGI sheet, and PPGI paint. Currently, we have 85 skilled employees, 5 professional engineers and 15 experienced office personnel. The manufacture capability of our production line is nearly 100,000 metric tons per year.

Our company produces high quality color coated steel, and imposes strict quality control over the prepainted steel coils. We use good quality hot-dip galvanized steel coils or Alu-Zinc coated steel coils as base sheet and strictly select coated paints, which gives quality promise to customers and competitive advantage for our company.

Recommended LINS: Steel Decking Sheets Prepainted Galvanized Steel Coils (PPGI) PE Coated Steel Products