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ICS 77.140.01 H 40 GB GB/T 20566-2006 Terminology of steel and alloy 2006-11-01 2007-02-01

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1 2 GB/T 13304 GB/T 13304-1991,neq ISO 4948/1 1982 Steel-classification-Part 1 classification of steels into unalloyed and alloyed steels based on chemical composition ISO 4948/2 1981 steel-classification Part2 classification of unalloyed and alloyed steels according to main quality classed and main property or application characteristic. 3 3.1 steel 2 2 2 3.1.1 3.1.1.1 unalloyed steel GB/T 13304 3.1.1.1.1 carbon steel 0.02 2 3.1.1.1.1.1 low carbon steel 0.25 3.1.1.1.1.2 medium carbon steel 0.25 0.60 3.1.1.1.1.3 high carbon steel 0.60 3.1.1.2 microalloy steel 0.22 3.1.1.3 low alloy steel

GB/T 13304 5 3.1.1.4 alloy steel GB/T 13304 3.1.1.5 high alloy steel 10 3.1.2 3.1.2.1 base steel 3.1.2.2 quality steel 3.1.2.3 special quality steel 3.1.3 3.1.3.1 carbon structural steel 3.1.3.2 high strength low alloy structural steel 0.20 2.5 295MPa 3.1.3.3 steel with improved atmospheric corrosion resistance 3.1.3.4 steel for building structure

3.1.3.5 steel for bridge Q345q Q370q Q420q 3.1.3.6 steel for hull 3.1.3.7 steel for pressure vessels 3.1.3.8 steel for low temperature service -20 o C 3.1.3.9 steel for boilers - - 20 3.1.3.10 steel for line pipe of oil and natural gas 3.1.3.11 Z steel with specified through-thickness characteristics Z15 Z25 Z35 3 3.1.3.12 CF crack-free steel 3.1.3.13 steel for anchor chain 3.1.3.14 steel for the reinforcement of concrete 3.1.3.15 steel for mines

3.1.3.16 steel for automobile 3.1.3.17 steel for vehicle 3.1.3.18 steel for wheel 3.1.3.19 steel for axle 3.1.3.20 steel for rail 3.1.3.21 steel for welding 3.1.3.22 free-cutting steel 3.1.3.23 steel for deep drawing 3.1.3.24 IF interstitial free steel 0.01% 3.1.3.25 dual phase steel 3.1.3.26 engineering steel for precipitation hot-working temperature 3.1.3.27 quenched and tempered steel

3.1.3.28 ultra high strength steel 1200MPa 1400MPa 3.1.3.29 quality carbon structure steel 3 3.1.3.30 alloy structural steel 3.1.3.31 steel for pressure work 3.1.3.32 steel for cut work 3.1.3.33 cold heading steel ML 3.1.3.34 structural steel subject to end-quench harden-ability H 3.1.3.35 steel for armor 3.1.3.36 steel for gun 3.1.3.37 steel for artillery - -

3.1.3.38 steel for projectile 3.1.3.39 carburizing steel 0.10% 0.25% 3.1.3.40 nitrating steel 3.1.3.41 spring steel 3.1.3.42 tool steel 3.1.3.43 unalloy tool steel 0.65% 1.35% 3.1.3.44 alloy tool steel 3.1.3.45 high speed tool steel 3.1.3.46 bearing steel 3.1.3.47 stainless steel 10.5% 3.1.3.48 heat resisting steel

3.1.3.49 non-magnetic steel 3.1.3.50 valve steel 3.1.3.51 vane steel 3.1.3.52 silicon steel for electrical grade 0.5% 4.5% 3.1.3.53 grain-oriented silicon steel 3.2% 3.1.3.54 grain non-oriented silicon steel 3.1.3.55 pure iron for electrical grade 3.1.4 3.1.4.1 converter steel 3.1.4.2 electric steel 3.1.4.3 electric-art furnace steel 3.1.4.4 consumable electrode vacuum arc steel

3.1.4.5 induction furnace steel 3.1.4.6 electroslag steel 3.1.4.7 refining steel outside furnace 3.1.4.8 killed steel 3.1.4.9 semi-killed steel 3.1.4.10 rimmed steel 3.1.5 3.1.5.1 austenitic steel 3.1.5.2 - austenitic-ferritic steel 3.1.5.3 ferritic steel 3.1.5.4 martensitic steel 3.1.5.5 precipitation hardening steel 3.1.5.6 pearlitic steel A1

3.1.5.7 bainitic steel M s 3.1.5.8 ledeburite steel 3.1.5.9 eutectoid steel 0.80 3.1.5.10 hypoeutectoid steel 0.02 0.8 3.1.5.11 hypereuctoid steel 0.8 2.0 3.2 special alloy 3.2.1 heat resisting superalloy 600 o C 1200 o C 3.2.2 precious alloy 3.2.2.1 soft magnetic alloy 0.8KA/m 3.2.2.2 permanent magnetic alloy

3.2.2.3 deformable permanent magnetic alloy 3.2.2.4 elasticity alloy 3.2.2.5 expansion alloy 3.2.2.6 thermostatic biomaterials 3.2.2.7 electrical resistance alloy 3.2.2.8 precious electrical resistance alloy 3.2.2.9 high resistance for electrical heating 3.2.3 corrosion resisting alloy 3.2.4 quick-quench metal

A A 3.2.1-3.1.5.2 3.1.4.5 3.1.5.1 3.1 B 3.1.3.20 3.1.4.9 3.1.3.42 3.1.3.34 3.1.5.9 3.1.5.7 3.1.3.10 3.2.2.3 3.1.5.11 3.1.3.47 3.1.3.9 C H 3.1.5.5 3.1.3.21 CF 3.1.3.12 3.1.1.4 3.1.3.28 3.1.3.44 3.1.3.17 3.1.3.30 3.1.3.18 3.1.3.14 3.1.3.19 3.1.3.37 3.1.3.6 I D IF 3.1.3.24 3.1.1.3 J 3.1.3.2 3.1.3.4 3.1.1.1.1.1 3.1.3.53 3.1.3.8 3.1.3.54 3.1.3.55 3.2.2.8 3.1.3.52 3.2.2 3.1.4.3 K 3.1.4.2 3.2.4 3.1.4.6 3.1.3.15 3.2.2.7 L F 3.1.5.8 3.1.3.50 3.1.3.33 3.1.1.1 3.1.4.7 3.1.4.10 M 3.1.3.26 3.1.5.4 G 3.1.3.13 3.2.2.9 N 3.1.1.5 3.1.3.3 3.1.3.45 3.1.3.48 3.1.1.1.1.3 3.2.3

P 3.1.2.3 3.1.3.38 3.1.3.27 3.2.2.5 3.1.5.3 3.1.2.1 W Q 3.1.1.2 3.1.3.16 3.1.3.49 3.1.3.5 Y 3.1.3.36 3.1.3.31 3.1.3.32 3.1.3.7 R 3.1.5.10 3.2.2.6 3.1.3.51 3.2.2.1 3.1.3.22 S 3.2.2.2 3.1.3.23 3.1.2.2 3.1.3.40 3.1.3.29 3.1.3.39 Z 3.1.3.25 Z 3.1.3.11 T 3.1.4.8 3.1.3.41 3.1.4.4 3.1.1.1.1 3.1.1.1.1.2 3.1.3.43 3.1.3.46 3.1.3.1 3.1.5.6 3.2.2.4 3.1.4.1 3.2 3.1.3.35

B A alloy steel 3.1.1.4 alloy structural steel 3.1.3.30 alloy tool steel 3.1.3.44 austenitic steel 3.1.5.1 austenitic-ferritic steel 3.1.5.2 B bainitic steel 3.1.5.7 base steel 3.1.2.1 bearing steel 3.1.3.46 C carbon steel 3.1.1.1.1 carbon structural steel 3.1.3.1 carburizing steel 3.1.3.39 cold heading steel 3.1.3.33 consumable electrode vacuum arc steel 3.1.4.4 converter steel 3.1.4.1 corrosion resisting alloy 3.2.3 crack-free steel 3.1.3.12 D deformable permanent magnetic alloy 3.2.2.3 dual phase steel 3.1.3.25 E engineering steel for precipitation hot-working temperature 3.1.3.26 elasticity alloy 3.2.2.4 electric steel 3.1.4.2 electrical resistance alloy 3.2.2.7 electric-art furnace steel 3.1.4.3 electroslag steel 3.1.4.6 eutectoid steel 3.1.5.9 expansion alloy 3.2.2.5 F free-cutting steel 3.1.3.22 ferritic steel 3.1.5.3 G grain-oriented silicon steel 3.1.3.53 grain non- oriented silicon steel 3.1.3.54 H heat resisting steel 3.1.3.48 heat resisting superalloy 3.2.1 high carbon steel 3.1.1.1.1.3 high alloy steel 3.1.1.5

high resistance alloy for electrical heating 3.2.2.9 high speed tool steel 3.1.3.45 high strength low alloy for electrical heating 3.1.3.2 hypeoutectoid steel 3.1.5.10 hypereutectoid steel 3.1.5.11 I IF 3.1.3.24 Induction furnace steel 3.1.4.5 K killed steel 3.1.4.8 L ledeburite steel 3.1.5.8 low alloy steel 3.1.1.3 low carbon steel 3.1.1.1.1.1 M martensitic steel 3.1.5.4 medium carbon steel 3.1.1.1.1.2 microalloy steel 3.1.1.2 N nitriding steel 3.1.3.40 non-magnetic steel 3.1.3.49 P pearlitic steel 3.1.5.6 permanent magnetic alloy 3.2.2.2 precious alloy 3.2.2 precious electrical resistance alloy 3.2.2.8 precipitation hardening steel 3.1.5.5 pure iron for electrical grade 3.1.3.55 Q quality carbon structure steel 3.1.3.29 quality steel 3.1.2.2 quenched and tempered steel 3.1.3.27 quick-quench metal 3.2.4 R refining steel outside furnace 3.1.4.7 rimmed steel 3.1.4.10 S silicon steel for electrical grade 3.1.3.52 semi-killed steel 3.1.4.9 soft magnetic alloy 3.2.2.1 special alloy 3.2 special quality steel 3.1.2.3 spring steel 3.1.3.41 stainless steel 3.1.3.47 steel 3.1

steel for anchor chain 3.1.3.13 steel for armor 3.1.3.35 steel for automobile 3.1.3.16 steel for artillery 3.1.3.37 steel for axle 3.1.3.19 steel for boilers 3.1.3.9 steel for bridge 3.1.3.5 steel for cut work 3.1.3.32 steel for deep drawing 3.1.3.23 steel for gun 3.1.3.36 steel for building structure 3.1.3.4 steel for hull 3.1.3.6 steel for line pipe of oil and natural gas 3.1.3.10 steel for low temperature service 3.1.3.8 steel for mines 3.1.3.15 steel for pressure vessels 3.1.3.7 steel for pressure work 3.1.3.31 steel for projectile 3.1.3.38 steel for rail 3.1.3.20 steel for the reinforcement of concrete 3.1.3.14 steel for vehicle 3.1.3.17 steel for welding 3.1.3.21 steel for wheel 3.1.3.18 steel with improved atmospheric corrosion resistance 3.1.3.3 steel with specified through-thickness characteristics 3.1.3.11 structural steel subject to end-quench harden-ability 3.1.3.34 T tool steel 3.1.3.42 thermostatic biomaterials 3.2.2.6 U unalloyed steel 3.1.1.1 unalloyed tool steel 3.1.3.43 ultra high strength steel 3.1.3.28 V valve steel 3.1.3.50 vane steel 3.1.3.51