EN41B NITRIDING STEEL|41CRALMO7-DIN 1.8509
EN41B Nitriding Steel manufacturers and suppliers,supplied with round rods,square/flat bars,rollers,shafts,blocks and forging pieces.
EN41B is defined as Cr-Mo-Al Nitriding steel as per BS 970 Standard.This material can obtain high wear resistance,good toughness and ductility after nitriding which can give a hard wear resistant case up to 68HRC. After hardened and tempered,EN41B has a tensile strength of 700-850MPa in R condition,and 775-925MPa in S condition. Typical applications for this steel are connecting rods, small extruders, valve stems, injection moulding equipment, hydraulic cylinders, gears, pinions, etc.
1.Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Al |
| EN41B | 0.35-0.45 | 0.1-0.45 | ≤ 0.65 | ≤ 0.05 | ≤ 0.05 | 1.4-1.8 | 0.1-0.25 | 0.9-1.3 |
| 38CrMoAl | 0.35-0.42 | 0.2-0.45 | 0.3-0.6 | ≤0.035 | ≤0.035 | 1.35-1.65 | 0.15-0.25 | 0.7-1.1 |
2.Related Specifications
DIN/EN:41CrAlMo7/34CrAlMo5
W-Nr:1.8509/1.8507
GB:38CrMoAl
ANFOR:40CAD6.12/30CAD6.12
JIS:SACM645
3.Heat Treatment & Mechanical Property
- Normalizing: 930 – 970°C,Cooling in air
- Annealing:840 – 870°C,Cooling in furnace
- Hardening:880 – 910°C,oil quench
- Tempering:550 – 720°C,Cooling in air
EN41B Tempering temperature Vs Hardness
| Tempering Temperature,℃ | 150 | 200 | 300 | 400 | 500 | 550 | 600 | 650 |
| Hardness,HRC | 56 | 55 | 51 | 45 | 39 | 35 | 31 | 20 |
EN41B Mechanical Property With Quenching and Tempering condition
| Tensile Strength,Mpa | Yield Strength,Mpa | Elongation,% | Charpy Impact, J | Brinell Hardness,HB | |
| R | Min 695 | Min 525 | Min 20 | Min 40 | 201-255 |
| S | Min 772 | Min 587 | Min 19 | Min 40 | 223-277 |
| T | Min 850 | Min 680 | Min 17 | Min 35 | 248-302 |
4.Supply Size & Condition
| Form of Supply | Size(mm) |
| Round bar | Φ16-Φ500 |
| Square bar | Thinkness:Max 500 |
| Flat bar/Blcoks |
Thickness :120-500 Width:120-1,500 |
Heat treatment:Normalized / Annealed
Surface finish:Black / Rough turned / Peeled