DIN (Deutsche Indutrie Normen) standard is the German Institute for Standardization (Deutsche the Institut für Normung abbreviation DIN) to develop. Steel, said of the DIN standard 17006 and DIN17007 digital systems (W-Nr) two.
The DIN17006 systems in the steel expressed as follows:
a non-alloy steel, steel class representation
Class 1 represents the melting method; Class 2 represents the original features; Category 3 represents the main symbols; Class 4 represents the principal value; Category 5 warranty; Class 6 Class 7 of the state; said tensile strength values.
1, the melting method B: * furnace LE: Electric Arc Furnace SS: Welding W: the converter Alternative E: general electric stove M: open-hearth T: Thomas additional letters: B-basic I: induction furnace PP: wrought iron Ti: Crucible Y-acid
2, the original feature A,: resistance to the aging L: alkali crisp
the The S: welding The G: containing P, S P: pressure welding (forge welding) U: boiling H: semi-killed steel Q: cold heading (extrusion, cold deformation) Z:, to stretch K: with low P, S R: sedation
3, the main symbol
St: to the strength of the material (this method applies only to non-alloy steel)
C: chemical composition (This method is applicable to other properties of non-alloy steel is more than the tensile strength or the need for heat treatment, such as carburizing, quenching and tempering), according to different quality and use in the C preceded by the letters K, m, f, g.
Cm: Control P, S (0.02 to 0.035)
Cf: said hardening
Cg: cold heading
Ck: P, S
4, the main value
St France: that the tensile strength of the lower limit
C method: very few carbon content
5, to ensure that the scope of 1. yield dim sum 4. yield point, bending or upsetting figures: bending or upsetting test (one sample per heat) 7. yield point, bending, upsetting and impact toughness bent or upset 5. bend or the top of forging and impact toughness 8. high temperature strength and creep strength
toughness of the 3. impact 6 The yield point and impact toughness 9. electrical properties or magnetic
6, the state A tempering G softening annealing HI surface high-frequency quenching NT Nitriding V Quenched and B treated by the best can be cut H quenching K processing (cold) S Stress relief annealing E the carburized , HF surface flame quenching N the Normalizing U without heat
7, the tensile strength values (St France this)
steel class representation for the low alloy steel
Class 1 represents the melting method; Class 2 represents the original features; Category 3 represents the carbon content; class represents the chemical element symbols; Category 5 represents the content of alloying elements; Section 6, said the state < br />
1, that the same method with the above-mentioned non-alloy steel melting
Melting method B: * furnace E: electric arc furnace SS: Welding W: the converter Alternative E: general electric stove M: open-hearth T: Thomas additional letters: B-alkaline
Y-acid I: induction furnace PP: wrought iron Ti: Crucible
2, that the same method with the original features of the above non-alloy steel
Original features A,: resistance to the aging K: with a lower P, S Q: cold heading (extrusion, cold deformation) U: boiling The G: containing P, S L: alkali crisp R: sedation Z: can be stretched H: semi-killed steel P: pressure welding (forge welding) S: welding
3, the carbon content. To very few.
4, in line with chemical elements, the number of content in order of priority, the same content in alphabetical order
5, the content of alloying elements:
The average content of alloying elements percentage × the element index elements , Cr, Co, Mn, Ni, Si, W Al, Cu, Mo, Nb, Ta, Ti, V C, N, P, S index The 4 The 10 The 100
6, state
That the same method with the above-mentioned non-alloy state
| A tempering | G softening annealing | HI surface high-frequency quenching | NT Nitriding | V Quenched and | B treated by the best can be cut | H quenching | K processing (cold) | S Stress relief annealing | E the carburized | , HF surface flame quenching | N the Normalizing | U without heat |
three types of steel for high-alloy steel, said method
Class 1 represents the symbol of high-alloy steel; Class 2 represents the carbon content; Category 3 indicates the major alloying elements;
Category 4 represents the content of alloying elements
1, the symbol of high-alloy steel. Steel preceded by an "X", if the carbon content does not matter, then X can be omitted.
2, the carbon content. To very few.
3, the main alloying elements. Chemical element symbols, the number of content in order of priority.
4, the content of alloying elements. A few percent (rounding of the integer).
four types of steel for carbon tool steel, steel, said method
Class 1 represents the steel symbol; Class 2 represents the carbon content; class represents the class number
A steel symbol labeled C
2, the carbon content of the very few that
3, the class number.
Subscript W Carbon Tool Steel: W1, P, S ≤ 0.020%
W2, P, S ≤ 0.030%
W3, P, S ≤ 0.035%
WS special purpose
five types of steel for high-speed tool steel, said method
Class 1 steel symbol; alloying elements of category 2; 3 content of alloying elements
1, steel symbols. Be labeled S
2, the alloying elements. Press W? Mo? V? Co. order of arrangement of Cr does not mean that.
3 content of alloying elements. A few percent between the numbers? "Separated (such as 12??): Does not contain Mo-0; without Co-not 0 means; provisions excluding Cr-4%
steel class representation for the cast steel steel
Class 1 steel symbol; Category 2 casting process; Class 3 steel grades
1, steel symbols. Steel, dubbed GS or G as cast steel.
2, the pouring process. K-mold casting; Z-centrifugal casting.
3, the steel grade, St., said non-alloy cast steel. C represents non-alloy and low alloy. Cases: such as the grade C10 C non-alloy and low alloy
seven types of steel for cast iron steel, said method
Cast iron is divided into a gray cast iron, ductile iron, malleable iron, alloy corrosion-resistant cast iron, austenitic cast iron
(A) gray cast iron
Class 1 steel symbol; 2 class tensile strength, said method; 3 sample code
1, steel symbols. Gray cast iron labeled GG.
2, the tensile strength of the minimum two figures: 15.
3 Sample Code: C-single-cast sample; A-for the provisions are not attached to the cast specimen type; K-K type attached cast specimens; the H-H type attached cast specimens
(B) ductile iron
Class 1 steel symbol; 2 class tensile strength of said method.
1, steel symbols. Ductile iron crowned of GGG.
2 indicates the minimum tensile strength of two numbers: such as 50.
(C) malleable iron
Class 1 steel symbol; 2 class tensile strength, said method; the 3 elongation
1, steel symbols. Malleable Iron Crown: the GTS-black heart malleable cast iron or non-decarburization annealing of malleable iron; GTW-white heart malleable cast iron or decarburization annealed malleable iron
2, the minimum tensile strength is expressed in the previous two numbers such as 35.
3, the minimum elongation after the two figures, such as 10.
(D) alloy corrosion-resistant cast iron
Class 1 steel symbol; Class 2 category code; three categories of the alloying elements; Category 4 Cr-Ni average content
1, steel symbols. Alloy corrosion-resistant cast iron shall be preceded by the G-X.
Category Code: 260 said.
Alloying element with chemical element symbols, such as the NiCr.
4, the two figures successive represents the average content of Cr-Ni (a few percent). : Successive said 42 percent of the average content of Cr-Ni
(E) of austenitic cast iron
Class 1 steel symbol; the alloying elements of category 2; Category 3 Ni average content
A steel sign
Austenitic cast iron crowned: of GGL-flake graphite austenitic cast
GGG-spheroidal graphite austenitic cast
2, the alloying element with chemical element symbols, such as NiMn
3, two digits successive said that the average content of N i (a few percent)