Alloy

AISI/SAE 3312

a 3 ½% Nickel-Chromium Case Hardening Alloy Steel

Typical Analysis

C	Mn	P	S	Si	Ni	Cr
.11	.47	.010	.002	.27	3.33	1.47

Characteristics

High alloy carburizing grade for those heavy-duty applications requiring high core strength, toughness and fatigue resistance over and above the widely used AISI 8620. Core strengths in the order of 170,000 psi (1172 N/mm2) are attainable. It is the preferred grade for carburized parts in severe operating conditions with excellent low-temperature properties. 3312 may also be used in the heat treated, non-carburized condition for many applications requiring extra strength and toughness. It is normally supplied in the annealed condition and hardness HB 212 would be typical.

Typical Applications

Heavy-duty gears, pinions, spline shafts, piston pins, transmission components, rock drilling bit bodies, plastic molds, etc.

Typical Heat Treatment

Forging
- Commence 1215℃ max.
- Finish 925℃ Bury in Mica.
Annealing
- 840℃ Furnace cool
Normalizing
- 900℃ Air cool
Hardened & Tempered (Uncarburized) – Heat to 815℃/ 840℃ and oil quench or Heat to 840℃/ 870℃ and air quench, then temper at 200℃/ 650℃ according to properties required.
Case Hardening – single refining treatment. After carburizing at 900℃/ 925℃, cool to RT. Reheat to 775℃/ 800℃, oil quench and temper at 200℃.

Mechanical Properties

Typical as supplied, Annealed.
Tensile Strength – 102,000 psi
- 2Tensile Strength – 704 N/mm
Yield Strength – 80,000 psi
- 2Yield Strength – 552 N/mm
Elongation – 24%
Reduction of Area – 65%
Hardness – HB 212
Machinability – 40

Mechanical Properties – UNCARBURIZED (Hardened & Tempered)

AISI/SAE 3312
Size – inches	1″ Dia	4″ Dia
Tensile Strength, psi	136,000	131,500
Tensile Strength, N/mm²	938	907
Yield Strength, psi	117,500	108,000
Yield Strength, N/mm²	810	745
Elongation (%)	19	17
Reduction of Area (%)	63	57
Izod Ft./Lbs.	83	68
Izod Joules	113	92
HB of Core	293	285

Mechanical Properties – CARBURIZED – Single refining (Hardened & Tempered)

AISI/SAE 3312
Size – inches	1″ Dia	4″ Dia
Tensile Strength, psi	173,000	152,000
Tensile Strength, N/mm²	1,193	1,048
Yield Strength, psi	132,000	109,000
Yield Strength, N/mm²	910	752
Elongation (%)	20	23
Reduction of Area (%)	60	63
Izod Ft./Lbs.	60	63
Izod Joules	81	89
HB of Core	341	311
Hardness of Case HRC	62	60

AISI/SAE 4130 (UNS G 41300)

a “30” Carbon Chromium-Molybdenum Alloy Steel

Typical Analysis

C	Mn	P	S	Si	Ni	Cr
.30	.50	.015	.010	.25	.90	.20

Characteristics

We stock this quality of E-4130 to meet the regulations of API Spec.6A.
Bars are heat treated to Designation 75K and are Charpy V-notch impact- tested to Classification K.
Stocks also conform to NACE Standard MROI- 75 with a maximum hardness of HRC22/HB235. E-4130 is readily machineable and weldable.

Typical Applications

Flanges, wellhead components, tool joints, etc.

Typical Heat Treatment

Forging
- Commence 1200℃ max.
- Finish 950℃
Annealing
- 830℃/ 855℃ Cool slowly in furnace
Normalizing
- 870℃/ 930℃ Cool in air
Hardened & Tempered: 840℃/ 870℃ Water quench, 855℃/ 885℃ Oil quench; 430℃/ 700℃ According to properties required.

Mechanical Properties

Annealed Typical
Tensile Strength – 80,000 psi
Yield Strength – 80,000 psi
Elongation – 28%
Reduction of Area – 57%
Hardness – 22 Rc Max, surface

AISI/SAE 4130 (UNS G 41300)	Mechanical Properties Normalized, Hardened & Tempered at 1150℉ min Typical, API-6A Designation 75K, Classification K
Size – inches	1″ Dia	4″ Dia	9 ½” Dia	15 ¼” Dia
Size – mm	101.6	177.8	241.3	387.4
Tensile Strength, psi	105,500	107,000	104,000	103,000
Tensile Strength, N/mm²	727	737	717	710
Yield Strength, psi	78,480	80,000	77,400	78,000
Yield Strength, N/mm²	541	551	534	538
Elongation (%)	26.8	25.1	28.2	24
Reduction of Area (%)	66.5	64.0	68.3	71.0
HB	223	228	225	220
CVN @-75℉	45/50/47	35/39/42	36/40/43	40/38/42

4140 Plate

AISI 4140 PLATE

Typical Analysis

C	Mn	P	S	Si	Cr	Mo
.40	.85	.020	.025	.25	.90	.20

Characteristics

The combined effect of the chromium and molybdenum contents ensures excellent hardenability with uniform properties. In the heat treated condition, plate exhibits strong abrasion and wear resistance as well as good impact and fatigue properties

Typical Applications

Recommended for use in high stress, abrasion/wear resistant applications such as gears, oil tools and machine tool components

Condition

As rolled surface finish, annealed alloy steel plate

Plate Dimensions

Available in gauge/width combinations from ¼” x 96″ to 4 ¼” x 72″

4140 TG&P Alloy

Alloy Cold Finished AISI 4140 PRECISION GROUND SHAFTING (UNS G 41400)

Turned, ground and polished shafting
Straightness tolerance of 1 1/16″ max in any five feet (5′)

Typical Analysis

4140
C	Mn	P	S	Si	Cr	Mo
.40	.85	.020	.025	.25	.90	.20
E-4140
C	Mn	P	S	Si	Cr	Mo
.42	.83	.006	.005	.28	1.02	.22

Characteristics

This high strength precision ground shafting is produced to exacting OD tolerances. The product offers the highest degree of overall accuracy and concentricity with a seam free surface finish of RMS 25 max. Precision ground shafting 4140 is available in both imperial and metric sizes

Typical Applications

All forms of close tolerance shafting: camshafts, drive shafts, mill shafts, motor shafts, pump shafts, bolts, pins, studs, etc

Mechanical Properties

For 215/16″ or 74.9 mm diameter bar and smaller,
ASTM A193, Grade B7 applies.
For 3″ or 76.2 mm diameter and greater, ASTM A434,
Class BD or BC applies.

Alloy Cold Finished AISI 4140 PRECISION GROUND SHAFTING (UNS G 41400)	Size Tolerances all tolerances are MINUS
1 1/2″ dia. (38.1 mm) and under	Minus 0.001” (0.03 mm)
Over 1 1/2″ dia. to 2 1/2″ dia (63.5 mm)	Minus 0.0015” (0.04 mm)
2 1/2″ dia. to 3″ dia (76.2 mm)	Minus 0.002” (0.05 mm)
Over 3″ dia. to 4″ dia (101.6 mm)	Minus 0.003” (0.08 mm)
Over 4″ dia. to 6″ dia (152.4″ mm)	Minus 0.004” (0.10 mm)
Over 6″ dia. to 7″ dia (177.8 mm)>	Minus 0.004” (0.10 mm)

Alloy AISI/SAE 4140/ 4142 (UNS G 41400/G 41442)

Chromium-Molybdenum Alloy Machinery Steel

Typical Analysis

4140
C	Mn	P	S	Si	Cr	Mo
.40	.85	.020	.025	.25	.90	.20
4142
C	Mn	P	S	Si	Cr	Mo
.42	.85	.006	.005	.28	1.02	.22

Characteristics

These chromium-molybdenum alloys are among the most widely used and versatile machinery steels. The chromium content provides good hardness penetration and the molybdenum imparts uniformity of hardness and strength. They respond readily to heat treatment and tensile strengths in order of 170,000 psi (1172 N/mm2) for small sections and 140,000 psi (965 N/mm2) for larger sections are attainable, all combined with good ductility and resistance to shock. They may be used in both high and low temperature applications and also in sour gas environments with appropriate heat treatments.
In the hardened and tempered condition these steels possess good wear resistance which may be considerably increased by flame or induction hardening. Alternatively, they may be nitrided. In the annealed condition, bars are supplied to a hardness of HB 207 approximately. Some sizes may be calcium treated. The 4140 Product is also available in a precision ground surface finish (25RMS Max).

Typical Applications

Shafts, gears, bolts, studs, connecting rods, spindles, tool holders. A wide variety of “oil patch” applications, drill collars, Kelly bars, tool joints, subs, couplings etc.

Typical Heat Treatment

Forging
- Commence 1200℃ max.
- Finish 950℃
Annealing
- 815℃/ 850℃ Cool slowly in furnace
Normalizing
- 870℃/ 900℃ Cool in air
Hardened & Tempered: 820℃/ 870℃ Oil quench; Tempering Not usually below 430℃ and up to 700℃ according to the properties required.

Mechanical Properties

Annealed:
Tensile Strength (min) – 100,000 psi
Elongation (min) – 18%
Reduction of Area (min) – 50%
Hardness: 22RC max
Charpy V-Notch at -50˚F – 20 FT LBS average- Minimum15 FT LB
Reduction Ratio – Minimum 4:1

Alloy AISI/SAE 4140/ 4142 (UNS G 41400/G 41442)	Mechanical Properties Heat treated to HRC 22 maximum for sour gas service. Minimum tempering temp 1150˚ F. Conforms to NACE Standard MR01-75. Also meets the tensile requirements of L80 as below Heat Treated and Stress Relieved to requirements of ASTMA434CLBC/ BD ≥3″ To 9 1/2″ Dia, minimum values
Size – inches	3 ¾” Dia	5 ¾” Dia	9.5″ Dia
Spec	BC BD	BC BD	BC BD
Tensile Strength, psi	115K 140K	110K 135K	105K 130K
Yield Strength, psi	95K 110K	85K 105K	80K 100K
Elongation (%)	16 14	16 14	15 14
Reduction of Area (%)	45 35	45 35	40 35

Alloy AISI/SAE 4140/ 4142 (UNS G 41400/G 41442)	Mechanical Properties Annealed – Typical
Size – inches	1″ Dia	2″ Dia	4″ Dia	8″ Dia
Tensile Strength, psi	98,000	102,000	101,000	100,000
Yield Strength, psi	61,000	62,000	57,000	58,500
Elongation (%)	23	26	25	21
Reduction of Area (%)	54	55	56	59
HB	197	212	202	197
Machinability	66	66	66	66

Alloy AISI/SAE 4140/ 4142 (UNS G 41400/G 41442)	Mechanical Properties Heat treated to requirements of ASTM A.193 Grade B7 – Up to 2.5″ Diameter, Minimum Values
Size – inches	Up to 2 ½” Dia	2 ½” to 4″
Tensile Strength, psi	125,000	115,000
Yield Strength, psi	105,000	95,000
Elongation (%)	16	16
Reduction of Area (%)	50	50
HB (Max)	321	115,000

AISI 4145 H MODIFIED HTSR

Solid Drill Collars to API Spec 7

Typical Analysis

4″ – 6 ¼” Dia
C	Mn	P+S	Si	Cr	Mo
.42/.49	.80/1.10	.025Max	.15/.35	.75/1.20	.15/.25
6 ⅜” – 7″ Dia
C	Mn	P+S	Si	Cr	Mo
.42/.49	.85/1.15	.025Max	.15/.35	.85/1.15	.25/.35
7 ⅛” – 10″ Dia
C	Mn	P+S	Si	Cr	Mo
.42/.49	.85/1.20	.025Max	.15/.35	.75/1.20	.15/.25
10 ⅛” – 11″ Dia
C	Mn	P+S	Si	Cr	Mo
.42/.49	.85/1.30	.025Max	.15/.35	1.00/1.30	.25/.35

Characteristics

Drill collar bars are usually supplied in lengths of 31’0″/31’6″ with a straightness tolerance of 125″ in 5 ft. The heat treatment is by water quenching, tempering and stress relieving to the mechanical properties detailed below. Tensile and impact specimens are taken within 3 ft. of the end of the bar and at 1″ below the surface. Tensile and impact testing is determined on the basis of one test per 10 bars per heat, per heat treatment lot. Bars are surface hardness tested at both ends, 9 ft. from each end. All bars are individually identified.

AISI 4145 H MODIFIED HTSR	Mechanical Properties Typical
Size – inches	4 ¾” Dia	6 ½” Dia
Tensile Strength, psi	156,509	148,884
Yield Strength, psi	137,452	126,020
Elongation (%)	19.6	18.6
Charpy V-Notch Ft/lb/J	52-52-51 ft/lbs	50-51-52 ft/lbs
Hardness HB	311	302

AISI 4145 H MODIFIED HTSR	Mechanical Properties Specified
Size – inches	Through 6 ⅞” Dia	Over 6 ⅞” Dia
Tensile Strength, psi	140,00	135,000
Tensile Strength, N/mm²	965	930
Yield Strength, psi	110,000	100,000
Yield Strength, N/mm²	759	689
Elongation (%)	13	13
Impact values at R.T
Izod ft/lbs/Joules
Charpy V-Notch Ft/lb/J	40/54 Min	40/54 Min
Hardness HB	40/54 Min	40/54 Min
⅛” below surface	285/ 341	285/ 341
1″ below surface	285 Min	285 Min

AISI 4150 CALCIUM TREATED HTSR

a ’50’ Carbon Chromium-Molybdenum Alloy Steel with Improved Machinability

Typical Analysis

C	Mn	P	S	Si	Ni	Cr
.50	.85	.020	.06/.1	.30	.95	.20

Characteristics

A general purpose alloy machinery steel with improved machinability as a result of an aim sulfur content. The product may or may not include the injection of a minute quantity of calcium. The calcium treatment modifies the sulfide inclusions in the steel to a much more globular form. Calcium also combines with the aluminates to form softer inclusions. The net effect (sulfur and calcium) is improved machinability and longer tool life.
Bars are supplied in the heat treated and stress relieved condition to a hardness level of approximately HB300 and are suitable for many service applications where strength and toughness are required

Typical Applications

Shafts, gears, pinions, spindles, axles, bolting, etc

Typical Heat Treatment

Hardening – 860℃/1580℉. Water Quench
Tempering – 550℃1022℉. Air Cool
Stress Relieving – 450℃/842℉

Mechanical Properties

HTSR – Typical
Tensile Strength – 50,000 psi
Yield Strength – 23,000 psi
Elongation – 20%
Reduction of Area – 52%
Hardness – HB302/Rockwell ‘C’ 32

Grade 4330+V

a Nickel-Chromium-Molybdenum-Vanadium Alloy Steel

Typical Analysis

C	Mn	P	S	Si	Ni	Cr	Mo	V
.30	.85	.010	.005	.25	1.95	.90	.45	.08

Characteristics

This steel is a modified Grade 4330 product with enhanced nickel, chromium, molybdenum and vanadium additions. The combination of chemistry and controlled heat treatment conditions result in an optimized combination of strength and toughness. This product is bested selected for highly stressed and demanding fatigue applications. Grande 4330 + V was developed for enhanced room temperature as well as low temperature Charpy-V-Notch performance. This product is available only in heat treated condition.

Typical Applications

Highly stressed parts requiring enhanced toughness and fatigue properties

Mechanical Properties

Grade 4330+V is available in two strength combinations:
Yield Strength, Minimum – 150/160 KSI
Tensile Strength, Minimum – 160/170 KSI
% Elongation, Minimum – 14% in 2 inches
% Reduction of Area, Minimum – 50%
Hardness – 34/42 HRC
Longitudinal CHARPY V-NOTCH TEST 1 (ASTM E23): @ 70 F (21°C) – 45 ft/lbs. Min Average, 35 ft/lbs Min Single Value
Longitudinal CHARPY V-NOTCH TEST 2 (ASTM E23): @ -4 F (-20°C) – 31ft/lbs. Min Average, 24 ft/lbs Min Single Value
Longitudinal CHARPY V-NOTCH TEST 3 (ASTM E23): @ -50 F (-45.5°C) – 20 ft/lbs. Min Average, 15 ft/lbs Min Single Value

AISI/SAE 4340 (UNS G 43400) & E04340 (UNS G43406)

a Nickel-Chromium-Molybdenum Alloy Machinery Steel

Typical Analysis

C	Mn	P	S	Si	Ni	Cr	Mo
.40	.70	.020	.020	.25	1.80	.80	.25

Characteristics

Richly alloyed heavy-duty steel, this nickel-chromium- molybdenum alloy possesses much deeper hardenability than the 4100 series, with increased ductility and toughness. These advantages are realized principally where high strength is required in heavy sections.
Also the high fatigue strength of 4340 makes it ideal for all highly stressed parts in the most severe conditions. It may be used in both elevated and low temperature environments; and has good wear resistance.
For special service conditions or where material may be subject to magnetic particle inspection we stock Aircraft Quality E-4340 to MIL-S- 5000 and AMS 2301 in condition E.I (Hot rolled Normalized and Tempered) to HB 235 max. AISI 4340 is stocked in the heat treated and stress-relieved condition at approximately 150,000 psi (1034 N/mm2) and in the annealed condition at HB 235 max.

Typical Applications

High strength machine parts, heavy-duty shafting, high tensile bolts and studs, gears, axle shafts, crankshafts, boring bars and down-hole drilling components.

Typical Heat Treatment

Forging

Commence 1200℃ max.
Finish 950℃

Normalizing

900℃ Air cool

Hardened & Tempered: (Owing to the air-hardening properties of AISI 4340, normalizing is not recommended except when followed by tempering.) 810℃/860℃. Oil quench.

Mechanical Properties

Annealed Typical
Tensile Strength – 80,000 psi
Yield Strength – 80,000 psi
Elongation – 28%
Reduction of Area – 57%
Hardness – 22 Rc Max, surface

AISI/SAE 4340 (UNS G 43400) & E04340 (UNS G43406)			Mechanical Properties Annealed – Typical
Size – inches	1″ Dia	2″ Dia	4″ Dia	8″ Dia
Size – mm	25.4 mm	50.8 mm	101.6 mm	203.2 mm
Tensile Strength, psi	114,000	110,000	106,000	104,000
Tensile Strength, N/mm²	786	758	731	717
Yield Strength, psi	91,000	86,000	85,500	81,500
Yield Strength, N/mm²	627	593	590	562
Elongation (%)	20	23	21	22
Reduction of Area (%)	46	49	50	48
HB	229	223	217	217
Machinability	55	55	55	55

AISI/SAE 4340 (UNS G 43400) & E04340 (UNS G43406)		Mechanical Properties Heat Treated and Stress Relieved to ASTM A 434 – Typical
Size – inches	2″ Dia	3¾” Dia	7″ Dia	10″ Dia
Size – mm	50.8 mm	95.25 mm	177.8 mm	254 mm
Tensile Strength, psi	162,000	155,904	145,152	144,256
Tensile Strength, N/mm²	1117	1075	1000	995
Yield Strength, psi	145,000	141,568	111,104	124,544
Yield Strength, N/mm²	1000	976	766	858
Elongation (%)	16	19	17	18
Reduction of Area (%)	50	55	47	45
HB	331	321	302	302

AISI/SAE 4340 (UNS G 43400) & E04340 (UNS G43406)	Mechanical Properties Normalized and Tempered – Typical. E-4340 AQ MIL-S-5000
Size – inches	2″ Dia	4″ Dia
Tensile Strength, psi	116,000	112,000
Yield Strength, psi	94,000	87,500
Elongation (%)	20	21
Reduction of Area (%)	53	52
HB	235	229

AISI/SAE 8620

a Nickel-Chromium-Molybdenum Case Hardening Alloy Steel

Typical Analysis

C	Mn	P	S	Si	Ni	Cr	Mo
.20	.80	.020	.0025	.25	.55	.50	.20

Characteristics

The most widely used alloy case-hardening steel, which may be carburized and hardened to produce a hard wear resistant case combined with core strength of the order of 125,000 psi (862 N/mm2). Uniform case depth, hardness and wear properties with minimum distortion are characteristics of this grade. The steel may also be used, not carburized, in a variety of general applications where a ’20’ carbon alloy is desirable.

Typical Applications

Heavy-duty gears, pinions, spline shafts, piston pins, transmission components, rock drilling bit bodies, plastic molds, etc.

Typical Heat Treatment

Forging
- Commence 1200℃ max.
- Finish 950℃
Annealing
- 840℃ Furnace cool
Normalizing
- 900℃ Air cool
Hardened & Tempered (Uncarburized) – Heat to 816℃/ 840℃ and oil quench or Water quench, temper at 200℃/ 650℃ according to properties required.
Carburizing – Direct oil quench – Carburize at 900℃/925℃ for eight hours (for .060 case depth). Oil quench. Temper at 150℃/232℃
150℃ – Case hardness approx. RC 63
232℃ – Case hardness approx. RC 58

Mechanical Properties

Grade 8620 is typically available Hot Rolled, As Rolled.
Larger diameters are Hot Forged, As Forged.

EN30B – BS 970 GRADE 835M30 BAR

a 4 ¼% Nickel-Chromium-Molybdenum Alloy Steel

Typical Analysis

C	Mn	P	S	Si	Ni	Cr	Mo
.28/.33	.40/.60	.025x	.015x	.10/.35	4.0/4.3	1.1/1.24	.20/.40

Characteristics

This product is stocked in two heat treat conditions:
- Quench and tempered
- Annealed
EN30B may be carburized if extra wear resistance is required.
This steel may be calcium treated.
* EN30B is produced to AQ, AMS 2301 cleanliness level

Typical Applications

Down-hole tools, heavy duty construction tools, rock drilling bit bodies, highly stressed gears and transmission components, heavy duty shafts and rolls.

Typical Heat Treatment

Forging – Commence 1200℃ (2190℉) Max.
Double Annealing – Austenitize 850℃ to 865℃ (1560℉ to 1590℉)

Quench and tempered

Machinability: Double Anneal at 635℃ to 650℃ (1175℉ to 1200℉)

Do not exceed 660℃ (1220℉)
A Hardness of 269 HB Max is achievable

Normalize, Temper & Stress Relieve – Austenitize 850℃ to 865℃ (1560℉ to 1590℉).

Air cool to room temperature
Temper 530℃ (990℉), air cool
Stress Relieve 500℃ (930℉), air cool

Hardened & Tempered Austenitize 850℃ to 865℃ (1560℉ to 1590℉) Forced air cool or oil quench. Temper at 200℃ (400℉), air cool.

Mechanical Properties

Measured at 1″ below the surface

EN30B – BS 970 GRADE 835M30 BAR	Mechanical Properties Quench, Tempered & Stress Relieved – Typical Annealed – Typical – HB 269 Maximum
Size – inches	Up to and including 10″ dia	Greater than 10″ Dia
Yield Strength, psi	135,000 psi	130,000 psi
Ultimate	160,000 psi	150,000 psi
Elongation (%)	13%	13%
Reduction of Area (%)	50%	45%
CVN at -50℉	15 ft-lbs	15 ft-lbs
CVN at Room Temperature	45 ft-lbs	45 ft-lbs
Hardness	HB321 to 363	HB321 to 363

AISI/SAE 52100 (UNS G52986)

High-Carbon, Chromium Alloy

Typical Analysis

C	Mn	P	S	Si	Cr
.98/1.10	.25/45	.025 Max	.025 Max	.15/.30	.1.3/1.6

Characteristics

This high carbon, chromium alloy is stocked in the annealed condition.
This grade is manufactured by the electric furnace process. Typically the quenched hardness is 62 to 66 HRC depending mainly upon section thickness

Typical Applications

Grade E52100 is used primarily for races and balls or rollers of rolling-element (anti-friction) bearings. The grade is also suitable for parts requiring high hardness and wear resistance

Typical Mechanical Properties (Annealed)

Yield – 85,000 psi
Tensile – 105,000 psi
Elongation – 17%
Reduction Area – 50%
BHN at surface – 228

Mechanical Properties – UNCARBURIZED (Hardened & Tempered)

Mechanical Properties – CARBURIZED – Single refining (Hardened & Tempered)

4140 Plate

4140 TG&P Alloy

For more Info About Our Products