16270 Pdf | Gb T

GB/T 16270 is managed by (Standardization Administration of China). The latest active version is GB/T 16270-2009 (superseding earlier 1996 edition). Authorized PDFs can be obtained from:

Chutes, dumper bodies, and excavator buckets.

The GB/T 16270 standard covers several high-strength steel grades. The most prominent grades specified within documents under this framework include: Minimum yield strength of 550 MPa. Q620: Minimum yield strength of 620 MPa. Q690: Minimum yield strength of 690 MPa. Q890: Minimum yield strength of 890 MPa. Q960: Minimum yield strength of 960 MPa.

Kept relatively low to maintain good weldability.

High Strength Structural Steel Plates in the Quenched and Tempered Condition gb t 16270 pdf

Typically applies to plates up to 150mm thick.

To achieve high yield strength without sacrificing weldability, the standard enforces strict limits on carbon, manganese, silicon, phosphorus, and sulfur. It also regulates micro-alloying elements like boron, chromium, molybdenum, nickel, vanadium, and titanium. A low carbon equivalent (CEV) value is prioritized to ensure excellent weld performance in shop and field environments. 2. Mechanical Properties

Due to their exceptional strength-to-weight ratio, GB/T 16270 steel plates are widely utilized in heavy-duty machinery and structural components, including:

: A balanced selection often chosen for high-load building frames. GB/T 16270 is managed by (Standardization Administration of

Phosphorus (P) and Sulfur (S) are strictly limited to prevent embrittlement. Mechanical Properties

Key changes introduced in the 2009 edition include:

The standard covers several high-strength steel grades, which are primarily categorized by their minimum yield strength (expressed in Megapascals, or MPa). The naming convention typically begins with the letter "Q" (for Qing or yield) followed by the yield strength value, and a quality grade letter (such as D, E, or F) indicating impact testing temperatures. Common grades specified in the GB/T 16270 PDF include: Minimum yield strength of 550 MPa. Q620: Minimum yield strength of 620 MPa.

Note: As plate thickness increases, the yield strength values decrease slightly. The GB/T 16270 standard covers several high-strength steel

): The maximum stress the material can withstand before breaking. The measure of the material's ductility. Impact Energy (KV2): Tested at low temperatures (e.g., 0∘C0 raised to the composed with power C -20∘Cnegative 20 raised to the composed with power C -40∘Cnegative 40 raised to the composed with power C

Note: The standard requires that the steel withstand these low temperatures without becoming brittle, which is crucial for outdoor structures in cold climates.

| Standard | Purpose | |----------|---------| | | Hot-rolled plate dimensions & tolerances | | GB/T 2975 | Mechanical test sampling location | | GB/T 1591 (for comparison) | Low-alloy high-strength (non-Q&T) | | GB/T 229 | Charpy impact test method | | GB/T 228.1 | Tensile test method |

Significantly higher than standard structural steels, providing safety margins against catastrophic failure.

It applies to steel plates with a thickness of used in structures such as bridges, buildings, offshore platforms, and other engineering applications requiring high strength and good weldability.