S P E C I A L S T E E L S

S P E C I A L S T E E L S

Index Free Cutting Steel 2M07 ( ENA) Page 2 Bright Mild Steel 070M ( ENA) Page 4 Carbon Axle Steel 0M ( EN8) Page 6 Carbon Steel 070M ( EN9) Page 8 % Chromium Molybdenum Steel 709M ( EN9) Page 0 ½% Nickel Chromium Molybdenum Steel 87M ( EN24) Page 2 ¼% Nickel Chromium Case Harding Steel 6M ( EN6B) Page 4 Hollow Bar ( ST2) Page 6 Keysteel Page 8 Metric Tolerances Page 9 Formulae for theoretical mass calculations ( PER METER) Page N.B. Test certificates for all materials are available on request. For standard sizes / specifications of materials outside our stock range and the scope of this booklet please give us a call and we shall endeavor help find them. Advice and assistance with regard to metal selection is provided in good faith but without responsibility. Page

SULPHURISED FREE CUTTING STEEL 2M07 EnA CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Phosphorous Sulphur MIN. 0.0 0. 0. MAX. 0. 0..0 0.07 0.0 MECHANICAL PROPERTIES BRIGHT COLD ROLLED OR BRIGHT COLD DRAWN ONLY Size ( Section in mm).mm or less.mm 8mm 8mm 6.mm 6.mm 00mm Tensile Strength: Mpa min. 4 8 Elongation % min. 0 4 4 4 FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.07 9S 2 B 2 G44 ( SUM 2) Page 2

APPLICATIONS It s typically used for high speed production of repetition work (e.g. manufacture of bushes, pins, bolts, nuts, studs and couplings) where the major requirements are rapid machining and maximum tool life. Cutting speeds on bright drawn free cutting steel bar are considerable above those of ordinary mild steel, and components are produced of similar mechanical properties with a far superior surface finish. Forgeability : Poor Heat Treatment Ability : Poor Machineability : Excellent Weldability : Poor Possible Disadvantages As this material has high additions of Sulphur, the formation of defects or stringers is evident throughout. This fact should be considered prior to machining jobs having big reductions on diameter or jobs bored out for bushes, etc. STOCK SIZE RANGE Round in mm diameter Hexagon in mm across flats 6 7 8 9 0 2 4 6 8 9 22 0.222 kg/m 0.02 kg/m 0.9 kg/m 0.499 kg/m 0.67 kg/m 0.746 kg/m 0.888 kg/m.042 kg/m.7 kg/m.87 kg/m.78 kg/m.998 kg/m 2.224 kg/m 2.466 kg/m 2.984 kg/m 24 26 27 28 0 2 6 8 42. kg/m.8 kg/m.68 kg/m 4.49 kg/m 4.824 kg/m.49 kg/m 6. kg/m 7. kg/m 7.9 kg/m 8. kg/m 9.86 kg/m 0.867 kg/m 2.48 kg/m.4 kg/m 8.6 kg/m 0 2 4 6 7 8 9 2 24 26 27 0.68 kg/m 0.82 kg/m 0.979 kg/m.49 kg/m.2 kg/m. kg/m.7 kg/m.96 kg/m 2. kg/m 2. kg/m 2.79 kg/m 2.998 kg/m.96 kg/m 4.96 kg/m 4.96 kg/m 0 6 8 4 46 6.8 kg/m 7. kg/m 8.8 kg/m 9.87 kg/m.428 kg/m 4.8 kg/m 6.996 kg/m.6 kg/m Page

BRIGHT MILD STEEL 070M ENA CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Sulphur Phosphorous MIN. 0.6 0.0 0. MAX. 0.24 0.. 0.0 0.0 MECHANICAL PROPERTIES BRIGHT COLD ROLLED OR BRIGHT COLD DRAWN ONLY Limited Ruling Section, min. Tensile Strength, MPa min. Yield Stress, MPa min. Elongation, % min. Izod Impact Value Brinnel Hardness Number 2mm 2 26 / 79 FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.02 C22 0 0 Page 4

APPLICATIONS It s typically used for shafts, bolts, nuts, studs and couplings and machinery components where a low tensile strength material is required. Forgeability : Good Heat Treatment Ability : Good Machineability : Good Weldability : Good STOCK SIZE RANGE BRIGHT DRAWN AND TURNED ROUND BAR 6 mm 7 mm 8 mm 9 mm /8 0 mm mm 7 /6 2 mm ½ 4 mm 9 /6 mm /8 6 mm 7 mm 8 mm 9 mm mm /6 2 mm 22 mm 7 /8 /6 24 mm 0.222 kg/m 0.02 kg/m 0.9 kg/m 0.499 kg/m 0.9 kg/m 0.67 kg/m 0.746 kg/m 0.76 kg/m 0.888 kg/m 0.994 kg/m.7 kg/m.9 kg/m.87 kg/m.4 kg/m.78 kg/m.782 kg/m.998 kg/m 2.226 kg/m 2.466 kg/m 2.626 kg/m 2.79 kg/m 2.984 kg/m.0 kg/m.496 kg/m. kg/m mm 26 mm 28 mm /8 0 mm /4 2 mm /8 mm 6 mm 8 mm ½ mm /8 42 mm /4 mm 7 /8 48 mm mm 2 2 /8 mm 2 /4.8 kg/m.978 kg/m 4.68 kg/m 4.824 kg/m.04 kg/m.49 kg/m 6. kg/m 6. kg/m 7. kg/m 7. kg/m 7.9 kg/m 8. kg/m 8.9 kg/m 9.86 kg/m 0.4 kg/m 0.876 kg/m 2.8 kg/m 2.48 kg/m.984 kg/m 4. kg/m.4 kg/m.9 kg/m 7.962 kg/m 8.6 kg/m.7 kg/m 60 mm 2 ½ 6 mm 2 /8 2 /4 70 mm 7 2 /8 7 mm mm /4 8 mm ½ mm 9 mm /4 00 mm 4 0 mm 4 /4 0 mm 4 ½ mm mm 4 /4 22.9 kg/m 24.86 kg/m 26.049 kg/m 27.8 kg/m 0.08 kg/m 0.20 kg/m 2.878 kg/m 4.6 kg/m.799 kg/m 9.8 kg/m 42.0 kg/m 44. kg/m 48.726 kg/m 49.99 kg/m.642 kg/m.96 kg/m 6.64 kg/m 6.642 kg/m 67.97 kg/m 7.846 kg/m 74.60 kg/m.47 kg/m 8.7 kg/m 88.78 kg/m 89.7 kg/m mm 0 mm /4 mm ½ mm mm /4 mm 6 mm 60 mm 96.7 kg/m 04.9 kg/m 09.64 kg/m 2.64 kg/m.2 kg/m.84 kg/m 29.627 kg/m. kg/m 8.72 kg/m 4.9 kg/m 48.2 kg/m 7.8 kg/m Larger sizes in black bar and forgings are also available but remember to allow for surface removal of ± 6% to ensure cleanup. Page

CARBON AXLE STEEL 0M En8 CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Phosphorous Sulphur MIN. 0.6 0.0 0.60 MAX. 0.44 0.. 0.0 0.0 MECHANICAL PROPERTIES BRIGHT COLD ROLLED OR BRIGHT COLD DRAWN ONLY Limiting Ruling Section, mm Tensile Strength, MPa min. Yield Stress, MPa min. Elongation, % min. Izod Impact Value, Joule Brinnel Hardness Number N 4 0 / 2 7 2 / 7 Condition Q 64 6 / 770 8 6.4 79 / 229 R 9 6 / 8 46 6.4 / FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.0 C 04 04 Page 6

APPLICATIONS It s typically used for dynamo and motor shafts, heattreated bolts, crankshafts, connecting rods, driving rings and flanges, railway couplings, axles, brackets, housing, miscellaneous gun carriage and small arms parts not subjected to high stresses or severe wear. Forgeability : Good Heat Treatment Ability : Good Machineability : Good Weldability : Average STOCK SIZE RANGE BRIGHT DRAWN AND TURNED ROUND BAR 6 mm 7 mm 8 mm 9 mm /8 0 mm mm 7 /6 2 mm ½ 4 mm 9 /6 mm /8 6 mm 7 mm 8 mm 9 mm mm /6 2 mm 22 mm 7 /8 /6 24 mm 0.222 kg/m 0.02 kg/m 0.9 kg/m 0.499 kg/m 0.9 kg/m 0.67 kg/m 0.746 kg/m 0.76 kg/m 0.888 kg/m 0.994 kg/m.7 kg/m.9 kg/m.87 kg/m.4 kg/m.78 kg/m.782 kg/m.998 kg/m 2.226 kg/m 2.466 kg/m 2.626 kg/m 2.79 kg/m 2.984 kg/m.0 kg/m.496 kg/m. kg/m mm 26 mm 28 mm /8 0 mm /4 2 mm /8 mm 6 mm 8 mm ½ mm /8 42 mm /4 mm 7 /8 48 mm mm 2 2 /8 mm 2 /4.8 kg/m.978 kg/m 4.68 kg/m 4.824 kg/m.04 kg/m.49 kg/m 6. kg/m 6. kg/m 7. kg/m 7. kg/m 7.9 kg/m 8. kg/m 8.9 kg/m 9.86 kg/m 0.4 kg/m 0.876 kg/m 2.8 kg/m 2.48 kg/m.984 kg/m 4. kg/m.4 kg/m.9 kg/m 7.962 kg/m 8.6 kg/m.7 kg/m 60 mm 2 ½ 6 mm 2 /8 2 /4 70 mm 7 2 /8 7 mm mm /4 8 mm ½ mm 9 mm /4 00 mm 4 0 mm 4 /4 0 mm 4 ½ mm mm 4 /4 22.9 kg/m 24.86 kg/m 26.049 kg/m 27.8 kg/m 0.08 kg/m 0.20 kg/m 2.878 kg/m 4.6 kg/m.799 kg/m 9.8 kg/m 42.0 kg/m 44. kg/m 48.726 kg/m 49.99 kg/m.642 kg/m.96 kg/m 6.64 kg/m 6.642 kg/m 67.97 kg/m 7.846 kg/m 74.60 kg/m.47 kg/m 8.7 kg/m 88.78 kg/m 89.7 kg/m mm 0 mm /4 mm ½ mm mm /4 mm 6 mm 60 mm 96.7 kg/m 04.9 kg/m 09.64 kg/m 2.64 kg/m.2 kg/m.84 kg/m 29.627 kg/m. kg/m 8.72 kg/m 4.9 kg/m 48.2 kg/m 7.8 kg/m Larger sizes in black bar and forgings are also available but remember to allow for surface removal of ± 6% to ensure cleanup. Page 7

CARBON STEEL 070M En9 CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Phosphorous Sulphur MIN. 0. 0.0 0. MAX. 0.60 0.. 0.0 0.0 MECHANICAL PROPERTIES Limiting Ruling Section, mm Tensile Strength, MPa min. Yield Stress, MPa min. Elongation, % min. Izod Impact Value, Joule Brinnel Hardness Number N 4 600 / 700 0 / Condition R S 02 64 6 / 8 770 / 48 4 4 / 22 / 277 T 9 8 / 000 70 2 248 / 02 FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.9 Cm 0 0 Page 8

APPLICATIONS It s typical uses are sprockets and springs, cylinders, cams, crankshafts, keys, small arms parts, small gears, machine tools, balls for ball mills, ballraces, machined parts requiring moderate wear resistance. Forgeability : Good Heat Treatment Ability : Good Machineability : Fair Weldability : Not Recommended STOCK SIZE RANGE ROUND BLACK BAR 0 2.466 kg/m.8 kg/m.49 kg/m 7. kg/m 9.86 kg/m 2.48 kg/m.4 kg/m 8.6 kg/m 60 6 70 7 8 9 22.9 kg/m 26.049 kg/m 0.20 kg/m 4.6 kg/m 9.8 kg/m 44. kg/m 49.99 kg/m.642 kg/m 00 08 0 60 6.64 kg/m 7.846 kg/m 8.7 kg/m 88.78 kg/m 04.9 kg/m.84 kg/m 8.72 kg/m 7.8 kg/m Larger sizes in black bar and forgings are also available but remember to allow for surface removal of ± 6% to ensure cleanup. Page 9

% CHROMIUM MOLYBDENUM STEEL 709M En9 CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Phosphorous Sulphur Chromium Molybdenum MIN. 0.6 0.0 0.70 0. 0. MAX. 0.44 0..00 0.04 0.04. 0. MECHANICAL PROPERTIES Limiting Ruling Section, mm Tensile Strength, MPa min. Yield Stress, MPa min. Elongation, % min. Izod Impact Value, Joule Brinnel Hardness Number R 4 6 / 8 4 4 / S 2 770 / 70 4 22 / 277 Condition T 02 8 / 000 66 4 248 / 02 U 64 / 0 7 2 47. 269 / V 29 000 / 60 8 2 47. 29 / 2 FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.72 GS42CrMo4 4H 4H G42 Type: SCM4H Page 0

APPLICATIONS It s typical uses are axle shafts, crankshafts, connecting rods, gears, high tensile bolts and studs, propeller shafts joints, rife barrel an breech mechanisms for small arms parts, introduction hardened trackpins. Forgeability : Good Heat Treatment Ability : Very Versatile Machineability : Difficult Weldability : Not Recommended STOCK SIZE RANGE ROUND BLACK BAR 0 60 6 70 7 2.466 kg/m.8 kg/m.49 kg/m 7. kg/m 9.86 kg/m 2.48 kg/m.4 kg/m 8.6 kg/m 22.9 kg/m 26.049 kg/m 0.20 kg/m 4.6 kg/m 8 9 00 0 0 60 9.8 kg/m 44. kg/m 49.99 kg/m.642 kg/m 6.64 kg/m 74.6 kg/m 8.7 kg/m 88.78 kg/m 04.9 kg/m.84 kg/m 8.72 kg/m 7.8 kg/m Larger sizes in black bar and forgings are also available but remember to allow for surface removal of ± 6% to ensure cleanup. Page

% NICKEL CHROMIUM MOLYBDENUM STEEL 87M En24 CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Phosphorous Sulphur Nickel Chromium Molybdenum MIN. 0.6 0.0 0..0.00 0. MAX. 0.44 0. 0.70 0.04 0.04.70. 0. MECHANICAL PROPERTIES Limiting Ruling Section, mm Tensile Strength, MPa min. Yield Stress, MPa min. Elongation, % min. Izod Impact Value, Joule Brinnel Hardness Number T 4 8 / 000 6.7 248 / 02 U 02 / 0 7 2 47. 269 / V 64 000 / 60 8 2 47. 29 / 2 Condition W 29 0 / 2 9.7 / 7 X 29 60 / 0 00 0 4 4 / 4 Z 29 min 0 444 min FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.66 NiCrMo6 98 98 G40, Class 8 Type: SNCM8 Page 2

APPLICATIONS Its typical uses are automobile main shafts, axle shafts, connecting rod bolts, synchronizing cones, push rods, studs, differential shafts, motorcycle kick starters ratchets, pinion sleeves, mandrel bars for tube manufacturing, gun barrels, breech mechanism parts, high duty engine connecting rods, high temperature bolts in oil refining and steam installations, various parts of machine tools such as spindle gears, compensating washers, transmission gears, slide rack and slide cams. Forgeability : Good Heat Treatment Ability : Good Machineability : Fair Weldability : Not Recommended STOCK SIZE RANGE ROUND BLACK BAR 0 2.466 kg/m.8 kg/m.49 kg/m 7. kg/m 9.86 kg/m 2.48 kg/m.4 kg/m 8.6 kg/m 60 6 70 7 8 9 22.9 kg/m 26.049 kg/m 0.20 kg/m 4.6 kg/m 9.8 kg/m 44. kg/m 49.99 kg/m.642 kg/m 00 08 0 60 6.64 kg/m 7.846 kg/m 8.7 kg/m 88.78 kg/m 04.9 kg/m.84 kg/m 8.72 kg/m 7.8 kg/m Larger sizes in black bar and forgings are also available but remember to allow for surface removal of ± 6% to ensure cleanup. Page

¼% NICKEL CHROMIUM CASE HARDENING STEEL 6M En6B CHEMICAL COMPOSITION ELEMENT Carbon Silicon Manganese Phosphorous Sulphur Nickel Chromium MIN. 0.2 0.0 0.0.00 0.60 MAX. 0.8 0. 0.60 0.0 0.0.7.0 MECHANICAL PROPERTIES HEAT TREATED CONDITIONS Tensile Strength, MPa min. 000 Elongation, % min. 9 Izod Impact Value, Joule Brinnel Hardness Number, max. FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat No. Din SAE AISI JIS.72 4NiCr0 6 E6 G2 Type: SNC22H Page 4

APPLICATIONS Its typical uses are heavy duty gears, auto and heavy vehicle transmission components, steering worms, track rod pins, gudgeon pins, timing wheels and other applications where a high surface hardness is required. Forgeability : Good Heat Treatment Ability : Very Good Machineability : Good Weldability : Not Recommended STOCK SIZE RANGE ROUND BLACK BAR 0 60 6 70 7 2.466 kg/m.8 kg/m.49 kg/m 7. kg/m 9.86 kg/m 2.48 kg/m.4 kg/m 8.6 kg/m 22.9 kg/m 26.049 kg/m 0.20 kg/m 4.6 kg/m 9.8 kg/m 8 9 00 08 0 60 44. kg/m 49.99 kg/m.642 kg/m 6.64 kg/m 7.846 kg/m 8.7 kg/m 88.78 kg/m 04.9 kg/m.84 kg/m 8.72 kg/m 7.8 kg/m 99.77 kg/m 222.70 kg/m 0 20 2 2 2 246.64 kg/m 27.89 kg/m 298. kg/m 26.48 kg/m. kg/m 8.6 kg/m Larger sizes and forgings are also available and please remember to allow for surface removal of ± 6% to ensure cleanup. Page

ELEMENT Carbon Silicon Manganese Phosphorous Sulphur HOLLOW BAR CHEMICAL COMPOSITION MIN. 0.8 0.. MAX. 0.2 0.. 0.0 0.0 Tensile Strength: MPa min. Yield Strength: MPa min. Elongation % min. MECHANICAL PROPERTIES 0 8 FOREIGN EQUIVALENT SPECIFICATIONS Standard German Mat. No. Din AISI.0 St2 8 STOCK SIZE RANGE Sizemm Wall Thickness Mass Sizemm Wall Thickness Mass O/D I/D mm kg/m O/D I/D mm kg/m 2 6 6 6 6 6 6 6 6 7 7 7 6 6 28 2 2 28 6 2 6 8 0 7. 8. 6. 2. 9 4 0 8.. 9 6. 7. 0.2.0 6.7 6.4 8. 6.6 2 9.6 4.6. 0 8.6.2 2.7 9.9 2.7 9..2 7 7 7 7 7 8 8 8 8 8 8 6 60 6 67 7 6 7 7. 7. 2. 7. 7. 8. 22. 7. 9. 9. 2.7.8 2...6 0.6 28..2 6..2. 0. 27.2 8. 9.9.8 27. Page 6

Sizemm Wall Thickness Mass Sizemm Wall Thickness Mass O/D I/D mm kg/m kg/m mm I/D O/D 9 9 9 9 00 00 00 06 06 06 06 06 06 2 2 2 8 8 8 2 60 60 60 60 70 70 70 6 97 7 6 7 6 6 7 8 6 6 7 00 00 00 2 00 06 2 00 2 2 00 8 22. 6 4 0 22 4. 0 2. 7. 0. 8 24. 6 27. 9 4 27 22 7. 2. 6 0 4 0 22 9 2. 0 24 4 26 4.6 2.7 29.7 22.9 4.9 2.4 24.2.8 47 2.9 9.7 4.9. 0 6.7 48.9 8.8 67.8 8.6 49.4 7.8.9 84.7 6 47. 02.9 9.2 77.8 70.2 62.2 47 2 00.9 8.0.8 2 97.8 6.4 70 0 0 0 22 22 22 22 224 224 224 26 26 26 2 2 2 267 267 267 267 270 27 27 27 27 292 292 292 298 00 2 60 06 2 60 2 60 60 70 60 70 70 0 67 87 27 228 0 7 9 22 228 242 2 28 0 4 27. 0 42 29 44 0 4. 26 2 2 27 22 48 2 9. 6 2. 4.4 2.4 09. 82.8 68 42.6 9 2. 88 72. 76. 96.8 88.4 47.2 08 6 9. 22 76 2.2 2 8 8.7 268 224 2.8 276 2 2 4 6 6 Page 7

KEYSTEEL Metric Imperial Square 4 6 8 0 2 4 6 8 22 28 0 2 6 Square /8 /6 ¼ /8 ½ /8 /4 7 /8 ½ 2 Flat 8 x 8 x 7 0 x 8 2 x 8 2 x 0 4 x 9 6 x 0 8 x x 2 22 x 4 x 4 28 x 6 2 x 8 6 x x 22 Flat ¼ x /6 /8 x ¼ ½ x ¼ ½ x /8 7 /8 x /6 /8 x ½ /4 x ½ x /4 7 ¼ x /8 Page 8

METRIC TOLERANCE ROUNDS DIAMETER Over mm to mm Over mm to 24mm Over 24mm to mm Over mm to 00mm Over 00mm to mm TOLERANCE +Nil / 0.0 mm +Nil / 0.07 mm +Nil / 0.00 mm +Nil / 0. mm +Nil / 0. mm SQUARES WIDTH Over mm to 6mm Over 6mm to 0mm Over 0mm to 8mm Over 8mm to 0mm Over 0mm to mm TOLERANCE +Nil / 0.07 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.60 mm HEXAGONS WIDTH Over 6mm to 0mm Over 0mm to 8mm Over 8mm to 0mm Over 0mm to mm Over mm to mm TOLERANCE +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.60 mm +Nil / 0. mm FLATS ( EXCLUDING KEY STEEL ) WIDTH THICKNESS SIZE TOLERANCE SIZE TOLERANCE Over mm 6mm Over 6mm 0mm Over 0mm 8mm Over 8mm 0mm Over 0mm mm Over mm mm Over mm 00mm +Nil / 0.07 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.60 mm +Nil / 0. mm +Nil / 0.2 mm Over.mm mm Over mm 6mm Over 6mm 0mm Over 0mm 8mm Over 8mm 0mm Over 0mm mm Over mm +Nil / 0.060 mm +Nil / 0.07 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.0 mm +Nil / 0.2 mm +Nil / 0.00 mm Page 9

FORMULAE FOR THEORETICAL MASS CALCULATIONS PER METER Section Formulae & Spec Aluminium Brass Bronze Copper Steel Stainless D Round D x D x 0.0022 0.00667 0.006924 0.00700 0.0066 0.006 t D Hollow / Tube D t x t x 0.008 0.026 0.02778 0.028 0.02466 0.0 t D Flat / Sheet D x t x 0.00272 0.00848 0.00882 0.00889 0.00786 0.004 D Square D x D x 0.00272 0.00848 0.00882 0.00889 0.00786 0.004 D Hexagon D x D x 0.00 0.00744 0.00768 0.00776 0.0068 0.00696 Page

Tel : 04 8 Fax : 04 884 sales@steelpipespe.co.za accounts@steelpipespe.co.za www.steelpipespe.co.za Perl Road, Korsten, Port Elizabeth P.O Box 2762, North End, 606