Specifications

material 5140
1.hot rolled,annealing or pre-hardened
2.flat/round bar
3.black surface
4.UT CC

MATERIAL 5140

alloy steel 40Cr / 41Cr4 / 5140 round bars

5140/1.7035/40Cr/41Cr4 16mm steel bar  

1. Standards
GB 40Cr, 40X, ASTM 5140, BS 520M40, JIS SCR440, NF 42C4, DIN 41Cr4(1.7035)

2. Size:
Round steel bar: Dia. 8-10000mm
Flat steel bar: 10-600*205*1500mm
Length: <12m

3. Machine Capability
Tensile strength (N/mm2Mpa): >=835
Elongation %: >=10
Yield strength: >=540
Hardness: HBS<=179
Reduction of area: >=40%
.
4. Machinability
Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.

5. Welding
Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.

 
6. Process:
EAF+LF+VD+ Forged+ Heat Treatment (Annealed, A Normalized, Q+T)

7. Application:
Extrusion dies and die-casting for alumium, Mandgnesium allay mostly, for copper alloy could use mechaincal press forhing of steel

8. Inspection
100% Ultrasonic according to the test standards: SEP1921-84, GR. 3 CLASS C/C

Chemical Composition(for reference only) (%)
C	Si	Mn	Cr	Ni	P	S	Cu
0.37~0.44	0.17~0.37	0.50~0.80	0.8~1.1	≤ 0.03	≤ 0.035	≤ 0.035	≤ 0.30