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Bright Mild Steel

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Special Steels - Brochure
Special Steels - Booklet

070M20

(En3A)

Applications

Its typically used for shafts, bolts, nuts studs, couplings and machinery components where a low tensile strength material is required.

Forgeability Good
Heat Treatment Ability Good
Machineability Good
Weldability Good

Chemical Composition

Element Min Max
Carbon 0.16 0.24
Silicon 0.10 0.40
Manganese 0.50 0.90
Sulphur – 0.05
Phosphorous – 0.05

Mechanical Properties

(Bright Cold Rolled or Bight Cold Drawn Only)

Limited Ruling Section, min. 152mm
Tensile Strength, MPa min. 430
Yield Stress; MPa min. 215
Elongation, % min. 21
Izod Impact Value –
Brinnel Hardness Number 126/179

Foreign Equivalent Specifications

Standard German Mat. No. Din SAE AISI JIS
1.0402 C22 1020 1020  

Stock size Range

(Bright Drawn and Turned Round Bar)

6 mm 0,222 kg/m 25 mm 3.853 kg/m 60 mm 22.195 kg/m 125 mm 96.337 kg/m
7 mm 0.302 kg/m 1″ 3.978 kg/m 2 ½“ 24.861 kg/m 130 mm 104.195 kg/m
8 mm 0.395 kg/m 26 mm 4.168 kg/m 65 mm 26.049 kg/m 5 1/4“ 109.634 kg/m
9 mm 0.499 kg/m 28 mm 4.824 kg/m 2 5/8“ 27.408 kg/m 135 mm 112.364 kg/m
3/8“ 0.599 kg/m  1 1/8“ 5.034 kg/m 2 3/4“ 30.018 kg/m 5 ½“ 120.323 kg/m
10 mm 0.617 kg/m 30 mm 5.549 kg/m 70 mm 30.210 kg/m 140 mm 120.841 kg/m
11 mm 0.746 kg/m 1 1/4“ 6.215 kg/m 2 7/8“ 32.878 kg/m 145 mm 129.627 kg/m
7/16“ 0.761 kg/m 32 mm 6.313 kg/m 75 mm 34.680 kg/m 5 3/4“ 131.511 kg/m
12 mm 0.888 kg/m 1 3/8“ 7.520 kg/m 3″ 35.799 kg/m 150 mm 138.721 kg/m
½” 0.994 kg/m 35 mm 7.553 kg/m 80 mm 39.458 kg/m 6″ 143.195 kg/m
14 mm 1.175 kg/m 36 mm 7.990 kg/m 3 1/4“ 42.013 kg/m 155 mm 148.123 kg/m
9/16“ 1.259 kg/m 38 mm 8.903 kg/m 85 mm 44.545 kg/m 160 mm 157.833 kg/m
15 mm 1.387 kg/m 1½” 8.950 kg/m 3½” 48.726 kg/m    
5/8“ 1.554 kg/m 40 mm 9.865 kg/m 90 mm 49.939 kg/m    
16 mm 1.578 kg/m 1 5/8“ 10.504 kg/m 95 mm 55.642 kg/m    
17 mm 1.782 kg/m 42 mm 10.876 kg/m 3 3/4“ 55.936 kg/m    
18 mm 1.998 kg/m 1 3/4“ 12.181 kg/m 100 mm 61.654 kg/m    
19 mm 2.226 kg/m 45 mm 12.485 kg/m 4″ 63.642 kg/m    
20 mm 2.466 kg/m 1 7/8“ 13.984 kg/m 105 mm 67.973 kg/m    
13/16“ 2.626 kg/m 48 mm 14.205 kg/m 4 1/4“ 71.846 kg/m    
21 mm 2.719 kg/m 50 mm 15.413 kg/m 110 mm 74.601 kg/m    
22 mm 2.984 kg/m 2″ 15.911 kg/m 4 ½“ 80.547 kg/m    
7/8“ 3.045 kg/m 2 1/8“ 17.962 kg/m 115 mm 81.537 kg/m    
15/16“ 3.496 kg/m 55 mm 18.650 kg/m 120 mm 88.781 kg/m    
24 mm 3.551 kg/m 2 1/4“ 20.137 kg/m 4 3/4“ 89.745 kg/m    

Larger sizes in black bar and forgings are also available but

remember to allow for surface removal of + 6% to ensure cleanup.