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|Type:||Alloy Steel||Shape:||Steel Round Bar|
40Cr / 41Cr4 / 5140 alloy steel specifications
GB 40Cr, 40X, ASTM 5140, BS 520M40, JIS SCR440, NF 42C4, DIN 41Cr4(1.7035)
Round steel bar: Dia. 8-10000mm
Flat steel bar: 10-600*205*1500mm
3. Machine Capability
Tensile strength (N/mm2Mpa): >=835
Elongation %: >=10
Yield strength: >=540
Reduction of area: >=40%
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.
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.
EAF+LF+VD+ Forged+ Heat Treatment (Annealed, A Normalized, Q+T)
100% Ultrasonic according to the test standards: SEP1921-84, GR. 3 CLASS C/C
Chemical Composition(for reference only) (%)
(1) Generally used for producing the important parts with high strength and good plastic.
(2) After nitrogen treatment, used for producing the important parts with special performance
requirements, such as shafts, gears, fasteners, bolt of large dia steamer etc.
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