SHEET & PLATE
.020 to 4.00 x R/W x R/L	GRADE	SPECIFICATIONS
	4130 COND A, N	AMS-6345, AMS-6350, MIL-S-18729
	4130 COND N	MIL-S-18729
	4340 COND A	AMS-6359
	JETHETE M-152	B50TF177

 

 

ROD & FORGINGS
Sizes: Rounds .125 to 8.00 Squares .125 to 6.00 Hexagons .250 to 3.00 Rectangles .125 to 1.88 to 6.00 x 8.00 forgings: full range of sizes	GRADE	SPECIFICATIONS
	4130 COND D	AMS-6370, MIL-S-6758
	4130 COND F	MIL-S-6758
	4140 COND C	AMS-6362, MIL-S-5626
	4330 COND E	AMS-6411, 6327, MIL-S-8699, BMS-7-27, CE0906
	4340 COND C, E, F	AMS-6414, 6415, MIL-S-5000, DMS-1555, BMS-7-28
	300M COND E	AMS-6417, 6419, MIL-S-8844 CL 3, BMS-7-26
	8620 COND C	AMS-6274, MIL-S-16974
	8740 COND C	AMS-6322, MIL-S-6049
	9310 COND E	AMS-6260, 6265, MIL-S-7393, BMS-7-249
	HY-TUF	AMS-6418
	D6AC	AMS-6431

 

TUBING
Sizes: .125 to 12.00 OD .005 to 4.00 Wall	4130 SEAMLESS	AMS-6360, 6371, MIL-T-6736
	4140 SEAMLESS	AMS-6381
	4340 SEAMLESS	AMS-6414, 6415
	8740 SEAMLESS	AMS-6322, 6323
	9310 SEAMLESS	AMS-6260, 6265

 

American Iron and Steel Institute Designations

 

The first two digits of the AISI number series indicates the primary alloying element in the alloy steel as follows:

 

13xx	Manganese 1.75%
40xx	Molybdenum 0.25%
41xx	Chromium 0.5%, 0.8%, 0.95%, Molybdenum 0.12%, 0.2%, 0.3%
43xx	Chromium 0.5%, 0.8%, Molybdenum .25%, Nickel 1.83%
44xx	Molybdenum 0.53%
46xx	Molybdenum 0.2%, 0.25%, Nickel 0.85%, 1.83%
47xx	Chromium 0.45%, Molybdenum 0.2%, 0.35%, Nickel 1.05%
48xx	Molybdenum 0.25%, Nickel 3.50%
50xx	Chromium 0.4%
51xx	Chromium 0.8%, 0.88%, 0.93%,0.95%, 1.00%
51xxx	Chromium 1.03%, 1.45%, Carbon 1.04%
61xx	Chromium 0.6%, 0.95%, Vanadium 0.13%, 0.15%
86xx	Chromium 0.5%, Molybdenum 0.2%, Nickel .55%
87xx	Chromium 0.5%, Molybdenum 0.25%, Nickel 0.55%
88xx	Chromium 0.5%, Molybdenum 0.35%, Nickel 0.55%
92xx	Silicon 2.0%
93xx	Chromium 1.2%, Molybdenum 0.12%, Nickel 3.25%

 

The letter "E" prefixed before the number indicates that the alloy was electric furnace pro­cessed. All other alloys were either open hearth processed, or processed by the basic oxygen method, or it may be electric furnace processed with no adjustments made in the phosphorus and sulfur limits. The last two digits indicate the mid-carbon range contained within the alloy. Example: 4140 indicates the mid-carbon range of this alloy is .40%. If there is a five number series, the last three digits indicate the mid-carbon range Example: 52100 indicate the mid-carbon range of this alloy is 1.00%.

 

E4130 Aircraft Quality Sheet and Plate 

Type 4130 is an electric-furnace processed, chromium-molybdenum aircraft quality alloy used primarily for welding or where moderate tensile strength is a requirement. The careful processing it undergoes completely eliminates the possibility of seams, grooves, pitting or blistering. It also undergoes diligent inspection and rolling to insure its freedom from lamination and tears. It is available in the normalized or annealed condition, and maybe pickled and oiled.

 

Applications
Type 4130 finals its primary use in the aircraft industry where moderate tensile strength in com­bination with good weldability is required.

 

E4130 Aircraft Quality Bars

4130 is an electric-furnace, through-hardening, chromium-molybdenum alloy processed to meet the rigid standards of the aircraft industry and vacuum degassed to conform to the magnetic particle inspection standards of AMS-2301. Its excellent weldability, formability and temperate hardenability predispose this alloy to a wide range of applications. Normalizing without liquid quenching increases its strength sufficiently for most uses; however, it may be heat treated for greater strength. It may be nitrited for maximum wear and abrasion resistance.

 

Applications
Type 4130 finds exceptional use where extremely high strength and hardness are required from relatively thin sections. It finds major use in applications requiring welding. It is extensively used in the aircraft industry for parts and components.

 

E4140 Aircraft Quality Bars

4140 is an electric furnace processed, through-hardening alloy processed to meet the rigid standards of the aircraft industry and vacuum degassed to conform to the magnetic particle inspection standards of AMS-2301. It contains .95% chromium and approximately .20% molybdenum. It has good fatigue, impact and abrasion resistance, and an extremely wide range of strength and toughness, obtainable by variations in heat treatments. In the fully hardened condition, it has outstanding tensile strength. It has a high fatigue and tensile ratio. 4140 may be successfully nitrited for maximum wear and abrasion resistance. It is remarkably well suited for use in extremely elevated temperatures.

 

Applications
4140 is generally used for applications of parts ½” or less necessitating a through hardening steel with strength as high as Rockwell "C" 50. Frequently used for fittings and forgings in the aircraft industry.

 

E4340 Aircraft Quality Bars

E4340 is a highly alloyed, electric-furnace processed; vacuum degassed grade, which conforms to the rigid aircraft standards of AMS-2301. It contains approximately 0.8% chromium, 1.8% nickel, and 25% molybdenum. The combination of these elements assures deep and uniform hardness when heat-treated, particularly when oil quenched. It possesses exceptional ductility and toughness and remarkably high fatigue strength, snaking E4340 the steel to use for highly stressed parts operating under heavy-duty conditions. It also maintains its excellent strength and hardness while functioning under extremely elevated temperatures.

 

Applications
E4340 finds its most typical use in highly stressed parts that must operate under severe conditions. It is commonly used in the aircraft and missile industries.

 

E8740 Aircraft Quality Bars

8740 is an electric-furnace processed, chromium-nickel alloy containing approximately .25% molybdenum. It is primarily an oil hardening steel designed to provide excellent shock resistance and outstanding hardenability. It is a very tough alloy, especially free from temper brittleness.

 

Applications
8740 finds extensive use in the aircraft industry for parts and components. It is primarily used where high strength, hardness, and good shock resistance are required.

 

E9310 Aircraft Quality Bars

Type 9310 is a vacuum degassed, carburizing steel containing approximately 1.25% chro­mium, 3.25% nickel, and .12% molybdenum. This alloy is suitable for heavy sectioned components because of its high hardenability and fatigue resistance, and because of its high core strength and hardness offering a narrow hardness range between light and heavy sec­tions. It offers excellent ductility and toughness, and may be used without carburizing. Most applications of 9310 do call for use in the carburized state, which increases its wear and abra­sion resistance to a high degree. It passes the most rigid magnetic particle inspections.

 

Applications
Used principally in the carburized state where extreme core hardness is required in combination with a minimal hardness range.

 

E52100 Bearing Quality Bars

552100 is an electric-furnace processed, vacuum degassed alloy containing approximately 1.5% chromium and 1.0% carbon. In order to maximize machinability and because of the high carbon content, 552100 may be spheroidize annealed. It is primarily a bearing steel possessing excellent resistance to wear and abrasion, medium toughness, and high strength in compression. It is a moderately deep hardening alloy with low softening resistance to elevated temperatures.

 

Applications
52100 finds its primary use in roller or ball bearing applications.