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Material Guide



These are general and special purpose steels widely used for a variety of job requirements. Choose from low cost, versatile 1018 ... up to 1117, 1141 all produced with controlled chemistry, toassure greater internal soundness, cleanliness, improved hardening qualities and better machinability.

For maximum machinability, choose screw stock - including 12L14, 12L14 + Te 1214Bi and 1215, or if greater strength is required select medium carbon, direct hardening steels.

LOW CARBON - CASE HARDENING

A36 (HR) Bars designed for use in structural applications. Minimum physical properties of 36 KSI yield strength and 58 KSI tensile strength. Conforms to ASTM A36.

1018, 1020 (HR, CF) A low carbon steel with a medium manganese content. Has good hardening properties, fair machinability. Readily brazed and welded. Suitable for shafting and for applications that do not require the greater strength of high carbon and alloy steels. Conforms to ASTM A-108 and AMS 5069. (Not applocable to bars under 2- 15/16 and sizes lighter than 29.34 lbs. per foot.)

1117 (HR, CF) A low carbon, high manganese steel. Machinability is greatly improved over 1018, and case hardening is deep and uniform, supported by a tough ductile core. Withstands bending, broaching and most deforming without cracking. Conforms to ASTM A-108, AMS 5022 and QQ-S-637.

11L17 (HR, CF) The addition of .15 to .35% lead to the 1117 analysis provides for even faster machining without changing the excellent case hardening characteristics. Conforms to ASTM A-108 and QQ-S-637.

M1O2O (HR) A low carbon, general purpose, merchant quality steel, produced to wider carbon and manganese ranges than standard steels. Suitable for forming and welding.

COMPARISON CHART

Est. Min. Mechanical Properties Based ¾  - 1-¼ on Rd. Bars.

Analysis

Tensile Strength psi

Yield Strength psi

Elong. in 2'

Red. of Area

Brinell Hardness

Machinability Rating +

1018
1117
11L17

64,000
69,000
69,000

54,000
58,000
58,000

15
15
15

40
40
40

126
137
137

70
90
125

 

 

+1112 = 100.

MEDIUM CARBON DIRECT HARDENING

1035 (HR) An intermediate carbon, special quality machinery steel, higher in strength and hardness than low carbon steel. Used for studs, bolts, etc.

1040, 1045 (HR, CF) Medium carbon steels used when greater strength and hardness is desired in the as-rolled condition. Can be hammer forged and responds to heat treatment. Suitable for flame and induction hardening. Uses include gears, shafts, axles, bolts and studs, machine parts, etc.

M1044 (HR) merchant quality steel is similar to AISI 1045, but less costly. Contains lesser amounts of manganese (.25/.60); strength and responsiveness to heat treatment are approximately the same.

1050 (CF) Strain hardened, stress relieved material which offers 100 KSI yield strength. Improved strength over 1045. Conforms to ASTM A311.

1141 (HR, CF) A medium carbon, special quality, manganese steel with improved machinability and better heat treatment response (surface hardness is deeper and more uniform) than plain carbon steels. Good as-rolled strength and toughness. Uses include gears, shafts, axles, bolts, studs, pins, etc.

11L41 (HR, CF) Has all the desirable characteristics of 1141 plus greatly superior machinability due to 0.15%/0.35% leadaddition.

1144 (HR, CF) Similar to 1141 with slightly higher carbon and sulphur content resulting in superior machinability and improved response to heat treating. Often used for induction hardened parts requiring 55 RC surface.

1144 A311 CL.B (CF) Steel bars with 100 KSI minimum yield. Capable of flame hardening to 56-60 R.D. for such applications as piston rods. Conforms to ASTM A311.

Stressproof (CF) High strength without heat treatment. Stress relieved. Readily machinable with minimum distortion. Conforms to ASTM A311.

Fatigue-proof (CF) Higher strength than Stressproof achieved by mechanical working and thermal treatment. Eliminates need for heat treating and secondary operations (cleaning, straightening, etc.) Readily machinable with low residual stresses.

COMPARISON CHART

Est. Min. Mechanical Properties Based on ¾ - 1¼  Rd. Bars.

Analysis

Tensile Strength psi

Yield Strength psi

Elong. in 2

Red. of Area

Brinell Hardness

Machinability Ratingt +

ASTM A36

58,000

36,000

23

21

-

-

M1020

55,000

30,000

25

50

111

50

M1044

80,000

44,000

16

40

163

65

1018, 1020

58,000

32,000

25

50

116

52

1035

72,000

39,500

18

40

143

65

1040

76,000

42,000

18

40

149

63

1045

82,000

45,000

16

40

163

56

1117

62,000

34,000

23

47

121

85

1141

94,000

51,500

15

35

187

65

11L41

94,000

51,500

15

35

187

95

1144

97,000

53,000

15

35

197

64

+AISI 1112 = 100

SCREW STOCK

These are the fastest machining steels for highest production rates on screw machines. Ail are in the low carbon range and can be case hardened. When superior case hardening qualities are

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