Jiangsu Jinruiheng Metal Materials Co., Ltd
Classification
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ST12 is a German standard (din1623), equivalent to DC01 of en10130, SPCC of JIS, ASTM a1008 CS of American Standard and Q / BQB 403 DC01 of Baosteel enterprise standard.
ST12 is common cold rolled steel, ST13 is stamping cold rolled steel, and ST14 is deep drawing cold rolled steel
ST12: represents the most common steel grade, which is basically the same as Q195, SPCC and DC01
ST12 mechanical properties: yield strength a MPa ≤ 280; tensile strength MPa ≤ 270 ~ 410; elongation after fracture (L0 = 80mm, B = 20mm)% ≥ 28
Symbol: St steel, 12 ordinary cold rolled steel sheet
Surface quality: FC - advanced finishing surface, FB - higher finishing surface.
Cold rolled steel is our most common and commonly used cold rolled product. Its grades can generally be divided into: ST12, ST13, ST14, St15, ST16, etc.; mechanical properties: it is the most common and basic steel grade. In principle (specified by the steel factory), it can only be bent and formed, and stamping is not allowed.
Cold rolled sheet and strip are widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc.
ST12 composition: carbon (c) ≤ 0.10, manganese (MN) ≤ 0.50, phosphorus (P) ≤ 0.035, sulfur (s) ≤ 0.035, Alt a ≥ 0.020
Spce is a steel grade of Japanese steel (JIS standard series), which represents cold-rolled carbon steel plate and strip (coil) for deep drawing, which is suitable for deep drawing and drawing.
Naming explanation:
The first code represents the material, and S (steel) represents the steel.
The second code indicates the type and purpose of the shape, and P (plate) indicates the board
The third code indicates the type of steel, and C (cold) indicates cold rolling
The fourth code indicates the stamping level, and E (elongation) indicates the deep stamping level
Quenching and tempering code (heat treatment type) of cold rolled carbon steel plate and strip (coil): annealing state is s, 1 / 8 hardness is 8, 1 / 4 hardness is 4, and hard (standard hardness) is 1
Surface structure No.: pitted surface is D, bright surface is B.
Product purpose:
It is used for deep drawing, and its deep drawing performance is higher than SPCC and SPCD. SPCD or SPCC can be used for stamping without drawing, and spce, spcf and SPCG can be used for deep drawing.
A steel grade of Japanese steel (JIS standard series), which represents cold-rolled carbon steel sheet and strip for stamping, which is equivalent to China 08Al (13237) high-quality carbon structural steel. Main purpose of SPCD: stamping and drawing purpose, which is between SPCC and spce. SPCC can be used for stamping that does not involve drawing, and spce can be used for deep drawing. In between, you can use SPCD.
Surface classification:
A small number of defects that do not affect the formability and coating and plating adhesion, such as slight scratch, indentation, pitting, roller print and oxidation color, are allowed on the surface of higher finishing surface FB.
Advanced finishing surface: the better one of the two sides of FC products shall have no obvious defects visible to the naked eye, and the other side shall at least meet the requirements of FB.
The better side of the two sides of FD products with ultra-high finishing surface shall not have defects affecting the appearance quality after painting or electroplating, and the other side shall at least meet the requirements of FB
SPCC was originally the steel name of "cold rolled carbon steel sheet and strip for general use" in Japanese standard (JIS), which is directly used by many countries or enterprises to represent similar steel products produced by themselves (for example, there is SPCC in Baosteel Q / bqb402 standard).
Application of SPCC material: SPCC steel is used as punch material. It is used directly without tempering after quenching. The hardness is 36 ~ 40HRC. Every ten punches can punch more than 2000 bolts, and the failure form is plastic deformation, which solves the phenomenon of fragmentation of punches in use and ensures the personal safety of operators.
SPCC material type: Japanese cold rolled carbon steel sheet applicable grades: SPCC, SPCD, spce symbols: S-STEEL, P-plate, c-cold rolling, the fourth c-common, d-draw and e-elongation.
Q345 is a kind of steel. It is a kind of low alloy steel, which is widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc. where "Q" means yield strength, 345 means that the yield strength of this steel is 345mpa. The yield value of Q345 will decrease with the increase of material thickness, and the domestic one may be less than 345mpa, so the strength must be less than 345mpa in mechanical design, otherwise there will be problems. Q235 - metal structural parts, carburized or cyanide parts with low core strength requirements, pull rods, connecting rods, hooks, couplers, bolts, nuts, sleeves, shafts and weldments
Q345 -- good comprehensive mechanical properties, low temperature performance, good plasticity and weldability. It can be used as structures, mechanical parts, building structures and general metal structures bearing dynamic loads such as medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations and bridges. It can be used in hot rolling or normalizing state. It can be used for various structures in cold areas above - 40 ℃。
Q195 is a carbon structural steel with a yield strength of 195mpa. Lower strength than Q235. Used in architecture, structure, motorcycle frame, etc. The brand of American ASTM is gr.b（ σ s185)。 σ S185 is the yield strength of 185mpa. It is used to manufacture anchor bolts, plowshares, chimney, roof panels, rivets, low-carbon steel wires, thin plates, welded pipes, pull rods, hooks, supports, welded structures, etc. Rolled sheet and wire rod. Cold and hot rolled steel sheets and galvanized, tinned and plastic composite steel sheets made from them are widely used in roof panels, decorative panels, general dust removal pipes, packaging containers, iron drums, instrument shells, switch boxes, protective covers, train carriages, etc. Wire rods are mostly cold drawn into low-carbon steel wires or galvanized into galvanized low-carbon steel wires, which are used for binding, tensioning and fixing, or as steel wire mesh, rivets, etc.
Add：Room 509, Building A, No. 32-7 Chengnan Road, Xinwu District, Wuxi City,China
Contact person:：Petra
E-mail: petra@jrhss.com
Whatsapp: 8613306166189
