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Chinese GB Standard

GB is the abbreviation 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.

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Chinese GB Standard

Q355 Steel, Q355B Q355C Q355D Properties, Composition & Equivalent

Q355 Steel (Q355B Q355C Q355D) Q355 steel is a Chinese 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, Q355C and Q355D. "Q" is the…
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Chinese GB Standard

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

Q345 Steel Properties 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, it has better properties than Q235. According to GB/T…
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Chinese GB Standard

4Cr13 (40Cr13) Stainless Steel Datasheet, Properties

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…
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Chinese GB Standard

Grade 20Cr Steel Composition, Properties, Material Equivalent

20Cr Steel Grade 20Cr steel is a kind of Chinese GB standard alloy steel. It has good comprehensive mechanical properties after quenching and low temperature tempering: good low temperature impact toughness and temper brittleness is not obvious.…
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Chinese GB Standard

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

Q235 Steel (Q235A Q235B Q235C Q235D) Q235 steel is a plain carbon structural steel which is widely used in China, Q235 material in Chinese standard GB/T 700 is divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D; Density of this steel is…
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Chinese GB Standard

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

GB 65Mn Steel 65Mn steel is a Chinese GB standard spring steel grade, Manganese (Mn) improves hardenability, so the strength, hardness, elasticity and hardenability are higher than that of 65# steel, but it has overheat sensitivity and temper…
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Chinese GB Standard

7Cr17MoV High Carbon Stainless Steel Properties, Hardness, Heat Treatment, Equivalent

7Cr17MoV Stainless Steel 7Cr17MoV steel is a Chinese GB standard Martensitic stainless steel grade produced by adding a small amount of molybdenum (Mo) and vanadium (V) to 7Cr17 to improve hardness and wear resistance. Similar international steel…
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Chinese GB Standard

China 8Cr13MoV Stainless Steel, Blade Steel Review, Hardness, Datasheet, Specification

Chinese 8Cr13MoV Stainless Steel 8Cr13MoV steel is made by Chinese stainless steel manufacturers with reference to AUS-8 stainless steel produced by Aichi steel, and its naming method refers to GB/T 20878, GB/T 1220, GB/T 3280 and GB/T 4356 (see…
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Chinese GB Standard

Q195 vs Q215, Q235 and Q275 Steel

Chinese GB Standard Carbon Structural Steel Specification Here we show the difference between Q195 vs Q215, Q235 & Q275, these steel series all belong to Chinese standard carbon structural steel, the lising below shows the difference of chemical…
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Chinese GB Standard

Q690 Steel, Q690C Q690D Q690E Chemical Composition, Mechanical Properties

Q690 steel and Q690M material is a Chinese GB standard high strength low alloy structural steel, and devides into 3 quality grades: Q690C, Q690D and Q690E, "Q" means Yield Strength, "690" refers to 690 Mpa, Tensile Strength is 770-940 Mpa, "M" is…
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