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Chinese GB Standard

GB is short for the first letter of the Pinyin “国标 Guo Biao”, which means “Chinese national standard” in English, and is issued by the Standardization Administration of the People’s Republic of China.

Mandatory standards are prefixed with “GB”; The recommended standard is prefixed with “GB/T”, T is short for the first letter of Pinyin “推荐 Tui Jian”, which means “recommended” in English.

Steel plate Q235 steel Q235A Q235B Q235C Q235D

Q235 Steel, Q235A Q235B Q235C Q235D Specification, Chemical Composition, Properties & Equivalent

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Q235 Steel Properties and Introduction Q235 steel is a Chinese GB standard plain carbon structural steel, and divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D, material density is 7.85 g/cm3, tensile strength is from 370 to...
I beam made from Q345 steel

Q345 Steel, Q345A Q345B Q345C Q345D Q345E Equivalent, Specification, Chemical Composition, Properties

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Q345 Steel Properties and Introduction Q345 steel is a Chinese GB standard Low Alloy High Strength Structural Steel, material density is 7.85 g/cm3, tensile strength is 470-630 Mpa, and yield strength is 345 MPa. According to GB/T 1591...
Mechanical gear made from 40Cr steel

40Cr Steel Equivalent, Mechanical Properties & Chemical Composition

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40Cr Alloy Steel 40Cr steel is a kind of Chinese GB standard alloy steel for engineering and machinery purpose, and one of the most widely used steel grades. For 40Cr material hardness, specifications and equivalent, please see the table...
68Cr17 7Cr17 stainless steel kitchen knife

7Cr17 Steel (68Cr17) High Carbon Stainless Steel

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68Cr17 (7Cr17 Steel) 68Cr17 (7Cr17 steel) is a Chinese high barbon chromium martensitic stainless steel with a higher quenching hardness than 2Cr13 steel. 7Cr17 stainless steel has high strength and hardness under quenching and tempering conditions, and has...
Grade 65Mn High Carbon Spring Steel

Grade 65Mn Steel High Carbon Spring Steel Properties, Specification, Equivalent

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GB 65Mn Steel 65Mn steel is a Chinese GB standard spring steel grade. Its strength, hardness, elasticity and hardenability are higher than that of 65# steel, but it has superheat sensitivity, easy to produce quench crack and temper...
Motor shaft made from 45 steel

China 45 Steel Equivalent, Mechanical Properties & Chemical Composition

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China 45 Steel Chinese GB standard 45 steel is a quality carbon structural steel, the cold plasticity is common. Annealing and normalizing are slightly better than quenching and tempering, and have high strength and good machinability. A certain...
42CrMo steel crankshaft

42CrMo Steel Equivalent, Chemical Composition, Mechanical Properties

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Introduction 42CrMo steel is a Chinese alloy steel, and has high strength and toughness, good hardenability, and no obvious temper brittleness. After quenching and tempering treatment, it has high fatigue limit and resistance to multiple impacts, and good...
stainless steel kitchen knife made from 3Cr13 steel

(30Cr13) 3Cr13 Stainless Steel Equivalent, Chemical Composition, Properties

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3Cr13 Steel Introduction Chinese 30Cr13 (3Cr13 steel) is a martensitic stainless steel, this steel has good mechanical processing performance. After heat treatment (quenching and tempering), it has excellent corrosion resistance and high polishing strength and wear resistance. After...
steel channel made from q355 steel

Q355 Steel, Q355B Q355C Q355D Properties, Composition & Equivalent

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Q355 Steel Introduction Q355 steel is a new Chinese steel grade of Low Alloy High Strength Structural Steel, which replaced Q345, the material density is 7.85 g/cm3. According to GB/T 1591 -2018, Q355 has 3 quality levels: Q355B,...
4Cr13 40Cr13 Stainless Steel

4Cr13 (40Cr13) Stainless Steel Datasheet, Properties

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4Cr13 Stainless Steel Introduction 4Cr13 steel (New name: 40Cr13) is a martensitic type stainless steel, which has higher hardness than 3Cr13 steel after quenching. The steel has good mechanical processing performance. After heat treatment (quenching and tempering), it...