Similar Grades:
SCM435, 34CrMo4
Shape:
Round, Flat,.
Size Range:
Diameter:20-480mm, Thickness:10-420mm.
Delivery Condition:
Annealed, Qunched and Tempered
Surface Condition:
Black, Grinded, Peeled, Polished
Packaging & Delivery
Packing details: In seaworthy packing, as your requirement.
Delivery details: within 30-50 days
Features:
1:Competitive price
2 Immediate delivery
3.Premium quality
4.Reliable service
Chemical Composition:
C |
Mn |
P |
S |
Si |
Cr |
Mo |
| 0.33-0.38 |
0.70-0.90 |
<= 0.035 |
<=0.040 |
0.15-0.35 |
0.80-1.10 |
0.15-0.25 |
Heat Treatment
Annealing: For optimum machinability, this grade of steel should be annealed to give a microstructure of coarse pearlite with a minimum of ferrite. From an austenitizing temperature of 1575ºF (855ºC) the steel is cooled to 1400ºF (760ºC) then to 1230ºF (665ºC) at 35ºF (19ºC) per hour, or to 1250ºF (675ºC) and holding for 4 hours, for an iso-anneal. In both cases the final step is an air cool.
Normalizing: This steel is normalized at 1600ºF (870ºC) followed by air cooling.
Hardening: The steel will be austenitized at 1550 - 1600ºF (845 - 870ºC) followed by water or oil quenching, depending upon size and intricacy of section.
Tempering: The steel will be tempered at temperatures to meet required mechanical properties, based on past experience.
Machinability: This grade is readily machinable following correct and appropriate heat treatment.
Weldability: The steel may be welded by normal fusion methods, but only in the annealed or normalized conditions. The steel should not be welded following harden and temper operations. Pre-heat and post-heat may be required, as per past experience.
Introduction
Alloy steels comprise a wide spectrum of steels whose compositions are more than the limitations of Va, C, Mo, Cr, Mn, Ni, Si, and B which have been fixed for carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels.
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