EnglishChinese Espanol
Home > Project >

 

  • WYJ038-2001

Certificates

WYJ038-2001 

1. The technology conditions GB3077 ­-88 standard with reference to the provisions of applicable to is not more than 150 mm thick plate.

2. The size, shape, weight and allow deviation

The steel plate size and shape, weight and deviation should be allowed to meet the provisions of the GB709-88.

3. Technical requirements

3.1 the chemical composition of steel (melting analysis) should comply with the regulations of the GB3077-88 standard. See table 1.

Chart 1

 

steel grade

C

Si

Mn

Mo

Cr

P

S

20CrMo

0.17~0.24

0.17~0.37

0.40~0.70

0.15~0.25

0.80~0.10

≤0.025

≤0.020

30CrMo

0.26~0.34

0.17~0.37

0.40~0.70

0.15~0.25

0.80~0.10

≤0.025

≤0.020

35CrMo

0.32~0.40

0.17~0.37

0.40~0.70

0.15~0.25

0.80~0.10

≤0.025

≤0.020

42CrMo

0.38~0.45

0.17~0.37

0.50~0.80

0.15~0.25

0.90~1.20

≤0.025

≤0.020

20CrMnMo

0.17~0.23

0.17~0.37

0.90~1.20

0.20~0.30

1.10~1.40

≤0.025

≤0.020

40CrMnMo

0.37~0.45

0.17~0.37

0.90~1.20

0.20~0.30

0.90~1.20

≤0.025

≤0.020

20Mn2

0.17~0.24

0.17~0.37

1.40~1.80

/

/

≤0.025

≤0.020

40Mn2

0.37~0.44

0.17~0.37

1.40~1.80

/

/

≤0.025

≤0.020

45Mn2

0.42~0.49

0.17~0.37

1.40~1.80

/

/

≤0.025

≤0.020

 3.2 delivery status: the annealing or high temperature firing back.

3.3 machinery and process performance

3.3.1 the annealing or high temperature tempering steel thick hardness index see table 2.

Chart 2

 

steel grade

20CrMo

30CrMo

35CrMo

42CrMo

hardness（HB）

≤197

≤229

≤229

≤217

steel grade

20Mn2

40Mn2

45Mn2

 

hardness（HB）

≤187

≤217

≤217

 

steel grade

20CrMnMo

40CrMnMo

 

 

hardness（HB）

≤217

≤217

 

 

3.4.2 provide sample after conditioning mechanical properties of σb, σs, the delta 5, normal temperature AKV.

Main Products

  • Friend Links：
  • S690Q Steel Plate
  • SA240 316L
  • steel flat
  • S355J2
  • SA516GR70
  • A283GRC
  • Corten A
  • A572GR50
  • Steel Plate supplier
  • Stainless profile
  • Stainless Welded Pipe supplier
    • Home丨About Us丨Contact Us Sitemap Tags  RSS