32CrB4, 1.7076 / 36CrB4, 1.7077 – boron steel according to PN-EN EN 10263-4:2017
Table of content:
| Standard | Grade | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | |||||||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Cu: | B: | ||||||||
| PN/EN | 32CrB4 / 1.7076 | ||||||||||||||
| 0,30-0,34 | 0,6-0,9 | <0,30 | <0,025 | <0,025 | 0,9-1,2 | <0,25 | 0,0008-0,0050 | ||||||||
| GOST | 30ChRA / 30XPA | ||||||||||||||
| 0,27-0,33 | 0,5-0,8 | 0,17-0,37 | <0,025 | <0,025 | 1,0-1,3 | <0,3 | 0,001-0,005 | ||||||||
| Ovako | 05622 | ||||||||||||||
| 0,30-0,34 | 0,6-0,9 | <0,30 | <0,025 | <0,025 | 0,9-1,2 | <0,25 | 0,008-0,0050 | ||||||||
| PN/EN | 36CrB4 / 1.7077 | ||||||||||||||
| 0,34-0,38 | 0,7-1,0 | <0,30 | <0,025 | <0,025 | 0,9-1,2 | <0,25 | 0,008-0,0050 | ||||||||
| Ovako | 38CrB4 | ||||||||||||||
| 0,34-0,38 | 0,7-0,85 | <0,1 | <0,015 | <0,015 | 1,05-1,20 | - | 0,002-0,005 | ||||||||
32CrB4, 1.7076 / 36CrB4, 1.7077 – description
Alloyed boron steel. Elements made of this steel are shaped by swelling or cold extrusion. After shaping, the finished elements are thermally improved, i.e. hardened and tempered.
The distinguishing feature of this alloy is the addition of boron, which significantly increases the hardenability of the alloy. Apart from boron, there is also a large amount of chromium. Chromium increases hardenability and delays martensite transformations during tempering, which ensures high strength and ductility.
32CrB4 Mechanical and Physical Properties
Physical properties
- Density: 7,83 g/cm3
Mechanical properties when spheroidized (+AC)
- Diameter D: 5-40 mm
- Hardness: 140 HB
- Yield strength Re: < 470 MPa
- Tensile strength Rm: < 550 MPa
- Percent reduction of area Z: > 69 %
Mechanical properties when spheroidized and cold drawn (+AC+C)
- Diameter D: 5-40 mm
- Hardness: 170 HB
- Tensile strength Rm: 580 MPa
- Percent reduction of area Z: 64 %
Physical and mechanical properties when spheroidized, cold drawn and skin passed (+AC+C+LC)
- Diameter D: 2-5 mm
- Tensile strength Rm: < 590 MPa
- Percent reduction of area Z: > 62 %
- Diameter D: 5-40 mm
- Tensile strength Rm: < 570 MPa
- Percent reduction of area Z: > 62 %
Mechanical properties when hardened (+H)
- Diameter D: 5-40 mm
- Hardness: 53 HRC
- Tensile strength Rm: 1700 MPa
36CrB4 Physical and Mechanical Properties
Physical properties
- Density: 7,83 g/cm3
Physical and mechanical properties when spheroidized (+AC)
- Diameter D: 5-40 mm
- Hardness: 150 HB
- Tensile strength Rm: < 570 MPa
- Percent reduction of area Z: > 61 %
Physical and mechanical properties when spheroidized and cold drawn (+AC+C)
- Diameter D: 2-5 mm
- Hardness: 180 HB
- Tensile strength Rm: < 570 MPa
- Percent reduction of area Z: > 63 %
- Diameter D: 5-40 mm
- Hardness: 180 HB
- Tensile strength Rm: < 550 MPa
- Percent reduction of area Z: > 63 %
Physical and mechanical properties when spheroidized, cold drawn and skin passed (+AC+C+LC)
- Diameter D: 2-5 mm
- Tensile strength Rm: < 610 MPa
- Percent reduction of area Z: > 61 %
- Diameter D: 5-40 mm
- Tensile strength Rm: < 590 MPa
- Percent reduction of area Z: > 61 %
Physical and mechanical properties when hardened (+H)
- Hardness: 54 HRC
- Tensile strength Rm: 1750 MPa
We deliver this steel alloy as:
- Forgings
- bars
- Wire rod
Replacements, equivalents and other designations:
32CrB4, 30ChRA, 30ChRA-Sh, 05622, 36CrB4, 38CrB4