ASTM 4130 SCM430 25CrMo4 1.7218 Alloy Hot Rolled Steel Bar

ASTM 4130 SCM430 25CrMo4 1.7218 Alloy Hot Rolled Steel Bar

1: AISI 4130 Steel Introduction

4130 alloy steel is a medium carbon, low alloy steel in ASTM A29 standard. ASTM 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0.28-0.33% Carbon, 0.8-1.1% Chromium and 0.15-0.25% Molybdenum. It is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weldability, at the expense of through thickness strength. With the proper heat treatment it is also readily machined. Annealing ASTM 4130 alloy steel offers excellent ductility. AISI 4130 steel is usually supplied as round bar commonly in the hardened and tempered condition.

4130 Steel Stock In Warehouse

2: 4130 Quality Standard

AISI 4140 steel according to ASTM A29-05.

3: 4130 Steel Equivalent

4: 4130 Steel Chemical Composition

5: 4130 Steel Mechanical Properties

The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

6: Qilu Company Profile

Hunan Qilu was engaged in steel exporting since 2008 year, the former was the sales company for Qilu Special Steel co.,ltd which was founded in 1986 year. Now Hunan Qilu Metal is one of most professional steel manufacturer and exporter in China. We already exported steel material to Germany, UK, Ireland, Greece, Italy, Poland,Belgium, Estonia, Latvia, Spain, France, Netherlands, Portugal, Czech republic, Finland, Russia, Belarus, Canada, Mexico, Brazil, Chile, Colombia, Peru, Argentina, Venezuela, Thailand, Indonesia, Vietnam, Singapore, Malaysia, Philippines, UAE, South Africa, Zambia, Australia etc.

7: Production Equipment

The company owns advanced special steel smelting facilities and forging processing equipment, the main steel-making equipment include 2 set of 50t and 25t ultra-high power electric arc furnaces, 2 set of 60t and 30t LF refining furnaces, 2 set of 60t and 30t vacuum degassing refining furnace. 4 sets of 1-20t electroslag re-melting furnaces.

The main forging equipment mainly include:3 sets of 3t 5t and 8t electro-hydraulic hammers, 3 sets of high-speed forging units of 1600t, 2000t and 4500t respectively.

8: Our Company Certificate

We already passed ISO 9000 : 2015 certificate of quality system, and we could supply steel forging material with all kinds of Classification Society Certification, such as ABS, ,DNV, BV, CCS etc. We also supplied steel material to oil industry with API certificate, such as API20B, API6A etc.

9: Stock&Warehouse

Besides forging material, we also supply hot rolled material from Dongbei special steel, Tiangong, Changcheng special steel, Lihuai Special Steel, Laisteel, Juneng steel, Yongsteel, Xinxin steel, Shijiazhuang steel etc. We have two warehouses for hot rolled material. Further processing such as heating treatment, rough machining and milled are also provided by us.

10: AISI 4130 Steel Overviews

11: AISI 4130 Steel Tolerance

12: Packing& Delivery

For the delivery, we will choose LCL, FCL and Bulk carrier according to order quantity. Usually if the quantity is less than 10tons, we will recommend LCL. If the quantity is more than 100tons, we will recommend bulk carrier. Usually FCL will be the most common for delivery.

In order to better ensure the safety of your goods, we will provide professional, environmentally friendly, convenient and efficient packaging services. Such as pallet, wooden box, package with woven bag etc.

13: AISI 4130 Steel Heat Treatment

Annealing
Annealing of 4130 steel forgings may be carried out by transferring the part straight from the forging operation to a furnace held at a suitable temperature, around 860o C (1575 o F) for annealing, holding for a suitable time then furnace cooling. In this way a structure suitable for machining may be obtained. This treatment is best used for parts with simple shapes. If the 4130 forging is such that some sections will finish much colder than others then a uniform structure will not be obtained and for best results a spheroidizing anneal at around 750 o C (1380 o F) may be used. It is safe to say that experience alone will decide the best type of annealing treatment to be used prior to machining.
It should then be cooled in the furnace at a rate of less than 50 F per hour down to 900 F, followed by air cooling from 900 F.
Normalizing
The nominal normalizing temperature for 4130 is 900 o C (1650 o F) followed by the 1600 F soak and oil quench, but production experience may necessitate a temperature either 50 o F (10 o C) above or below this figure. In fact when forgings are normalized before, for example, carburizing or hardening and tempering, the upper range of normalizing temperatures is used. When normalizing is the final heat treatment, the lower temperature range is used.
Hardening
The steel 4130 should be austenitized – i.e. all micro constituents transformed to austenite – at 1500 to 1600 o F (815 to 870 o C). The actual austenitizing temperature is a function of chemical composition within the analysis range, section size and cooling method. Smaller sections of 4130 might be quenched in oil, heavier sections in water.
Tempering
The actual tempering temperature will depend on what required properties are needed. Alloy steel 4130 is tempered at between 398 oC -565 oC (750 F and 1050 F), depending upon the strength level desired. The lower the tempering temperature the greater the strength.

14: AISI 4130 Steel Application

4130 are used for Commercial aircraft, aircraft engine mounts, military aircraft, automotive, machine tools, hydraulic tools, auto racing, aerospace, oil and gas industries as forged valve bodies and pumps, agricultural and defense industries etc.

15: Delivery Condition

For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed or QT, black surface or rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed or QT, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed or QT, black surface.