SAE 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.Â
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip,oil drill pipe joints and fishing tools,etc.
1) Weldability suffers with increasing chromium content;
2) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum;
3) Molybdenum significantly reduces temper brittleness;
4) Chromium renders steel oil hardenable and increase hardenability;
5) Chromium molybdenum high tensile steel with yield strength of 550N/mm2;
TensileÂ strength:Ïƒb (MPa):â‰¥1080(110)Â
YieldÂ strength:Ïƒs (MPa):â‰¥930(95)
SectionÂ shrinkage:ÏˆÂ (%):â‰¥45
ImpactÂ work:Akv (J):â‰¥63
ImpactÂ toughnessÂ value:Î±kv (J/cmÂ²):â‰¥78(8)
Round Bar diameter 14-460mm.All the sizes as require can be customerized as fresh production with MOQ.
Hot rolled,Â Heat Treatment,black, hardness or tempered hardness:28-34 HRC.
6,Â Delivery time
ForÂ abundant stock, 15-20 days.For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing machine) to make customer's specification.
The straight ladder provides easy access to mid-range heights, can be used for reaching windows, cleaning gutters or any medium height requirement.
The side rails are extra heavy duty I-beam rails and the aluminum round rungs are deeply serrated for slip resistance. The components are connected with the riveting process, which very is firm and safe.
Max load capacity is 100 kg; extension length can be 1.8m to 4.5m.
Safety Step Ladder,Aluminium Step Ladders,Straight Ladders,Standard Ladder
SUZHOU RIZHONGTIAN ALUMINUM CO.,LTD. , http://www.alumi-china.com