Q215A is a steel material. Q represents the yield of this material degree, the latter 215, refers to the yield value of this material, in the 215 or so. And will increase as the thickness of the material and its yield value decreases. Because carbon is moderate, better overall performance, strength, ductility and good welding performance with, most widely used.

Features and Scope
Low strength and high ductility, good weldability, used to make rivets. Bolt. Furnace stays. Moldboard and discontinuity and large welded stampings.

Introduction
Q215A often rolled into a plate of carbon steel or round steel, square steel, flat steel, angle steel, I-beam, channel steel, steel and other steel window frame, the thick steel plate. A lot of use with building and engineering structures. Or construction of plant for the production of steel house frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc., but also a large number of performance requirements for the mechanical parts are not too high. C, D grade steel can be used for certain specialized steel.

Chemical composition
Carbon C :0.09-0 .15


Si Si: ≤ 0.30


Manganese Mn :0.25-0 .55


Sulfur S: ≤ 0.050


Phosphorus P: ≤ 0.045


Chromium Cr: allow the residual content ≤ 0.030


Ni: to allow the residual content of ≤ 0.030


Copper Cu: to allow the residual content ≤ 0.030


Note: deoxidation method: F, b, Z

Mechanical properties
Tensile strength σb (MPa) :335-450


Yield strength σs (MPa): ≤ 16 时: ≥ 215;


Yield strength σs (MPa> 16 ~ 40 time: ≥ 205;


Yield strength σs (MPa> 40 ~ 60 time: ≥ 195;


Yield strength σs (MPa> 60 ~ 100 time: ≥ 185;


Yield strength σs (MPa> 100 ~ 150 time: ≥ 175;


Yield strength σs (MPa> 150 when: ≥ 165


Elongation δ5 (%): ≤ 16 时: ≥ 31


Elongation δ5 (%);> 16 ~ 40 when;: ≥ 30


Elongation δ5 (%);;> 40 ~ 60 at: ≥ 29;


Elongation δ5 (%);> 60 ~ 100 when: ≥ 28;


Elongation δ5 (%);> 100 ~ 150 at: ≥ 27;


Elongation δ5 (%);> 150 at: ≥ 20

Heat treatment process
Sample size: sample thickness (diameter) heat treatment specifications and microstructure