mechanical properties, welding sales offices and

Condition/ wallthickness mm

Yield strength ReH min MPa

Tensile strength Rm min, MPa

Elongation A5 min %

Hardness ca HB

Impact strength KV min at – 40°C, J

Normalized

≤ 15 430 600 25 190 27

15–25 400 580 25 220 27

> 25 380 560 25 220 27

Q/T

– 30 600 700 18 260 27

> 30 570 670 16 225 27

Wall thickness mm

Yield strength ReH min MPa

Tensile strength Rm min MPa

Elongation A5 min %

Hardness ca HB

≤ 25 500 670 17 225

> 25 470 640 17 220

E470 470 640 17 220

C % Si % Mn % P % S % Cr % Ni %

min 0.16 0.30 1.45

max 0.20 0.40 1.60 0.025 0.040 0.30 0.20

Combined wall thickness, mm

Outer diameter, OD tolerance mm

≤ 80 ± 0,4 mm> 80 ± 0,5 % av YDLevel 2 ± 0,5 % av YD

Execution Wall toleranceNormal ± (5 % + 0,1 mm) (min ± 0,7 mm) E470 ≤ 30 mm ± 12,5 % > 30 mm ± 10 %

Outer diameter, OD tolerance mm

< 60 ± 0,20 mm≥ 60 ± 0,25 mm

Wall thickness Wall tolerance mm≤ 6 ± 0,30 mm> 6 – < 8 ± 0,35 mm≥ 8 ± 0,40 mm

Cutting depth, mm

Feed mm/rev

1 2 3 4

Cutting speed, m/min and power, kW

0.250.320.400.50

480/5.3450/5.9420/6.5380/6.8

400/8.8370/9.7340/10.4290/10.4

370/14.6310/14.3260/14.0

295/18.1260/18.7

Surface roughness, Ra μm

Nose radius, mm

0.8 1.2 1.8 2.0

Feed, mm/rev and cutting speed, m/min

0.40.8

0.13/5500.18/540

0.15/5200.20/508

0.18/4900.25/475

0.21/4600.32/455

Valid steel grades Replaced steel gradesOvako EN 10294 SS DIN AFNOR

280 E 470 2142 20MnV6 20MV6

OVAKO 280STOCK SIZES AND TECHNICAL DATA

In the bottom part of the chipbreaking diagrams the innermost area indicates the limits for good chip forming. The cutting speed recommendations at the top of the diagrams shows the cutting speed interval where a 15 minutes tool life can be reached, i. e. recommended cutting speeds. The marked area shows two partially overlapping insert grades.

Ovako 280 tube is well suited for most commonly applied heat treatment processes. If properly executed, the result of the heat treatment will be very consistent, with small and predictable dimensional changes.

Normalizing: 900–920°C. Cooling in air.

Stress relieving: 550–600°C. Soaking time 1–2 hours. Cool with the furnace or in air.

Quenching and tempering: 900–920°C. Quench in water and temper at around 500°C for 1 hour.

Case hardening: Carburizing at 850–950°C. Quenching from 780–830°C in oil or step bath. Tempering at 50–200°C for 1 hour

Normal surface hardness: 58–63 HRC.

Nitriding: 500–520°C. Surface hardness around 650 HV. Also suitable for ion nitriding.

Ovako 280T has good welding properties and can be welded with all conventional welding methods. The low carbon equivalent means that 280T can be welded without preheating up to fairly large dimensions.

• For the best results welding should be continuous, and the weld should be slowly cooled in ambient air conditions.

• If the welding is performed in a damp environment or if the temperature is below 5°C the preheating temperature should be increased by 25°C.

• To minimize the effects of a mixed zone, the chemical compo-sition of the filler metal should be similar to that of the base material.

• Hydrogen content should not exceed 5 ml/100 g weld metal.

• Post-heating directly after welding also assists the removal of hydrogen. It should be performed at 200°C, directly after welding, holding for 5 min/mm material thickness, for at least one hour.

Straightness The maximum deviation from the straight line is 1 mm on a gauge length of 1,000 mm.

Ovality The ovality may amount to maximum 65 % of the total OD-tolerance.

Finish turned size Guaranteed finished turned size is valid up to a part length of max 3 x OD. For sizes with E470 tolerances the fin-ished turned size is guaranteed up to a part length of max 600 mm.

Tolerances, hot-rolled

Steel grades

Mechanical properties after heat treatment Recommended working temperatures for welding with ferritic consumables

Chemical composition

Tolerances, cold worked*

* Stress relieved

Machining recommendations for hollow bar inserts

Ovako 280/Sandvik Coromant P-LineHeat treatment Welding Sales offices and manufacturingMechanical properties,

hot-rolled condition

Definitionsap = cutting depth, mmfn = feed, mm/revvc = cutting speed, m/min4315 etc = Coromant gradePR, PM, PF = Coromant insert geometry

The diagrams are based on tests performed by Sandvik Coromant and Ovako on the Ovako 280 hollow bar with Coromant inserts of the given grades and geometries.

Rough turningCutting tool: CNMG 120412-PM, GC 4025Wear out time: 15 minutesWear out criterium: Vbmax 0.40 mmNose radius: 1.2 mmHolder: PCLNL 2525 M12Cutting fluid: Oemeta S33 V24 5 %

Fine turningCutting tool: CNMG 120404-PF CNMG 120408-PF GC 4015Wear out time: 15 minuterWear out criterium: Vbmax 0,30 mmHolder: PCLNL 2525 M12Cutting fluid: Oemeta S33 V24 5 %Cutting depth: 1,0 mm

Conversion factorsTool P15: x 1.1Tool P35: x 0.85Forged or milled surface: x 0.7–0.9

Intermittent machining: x 0.8–0.9Internal turning: x 0.8Unstable conditions: x 0.7–0.9Turning in E 470: x 0.7 (SS 2142)

Conversion factorsTool P10: x 1.1Tool P25: x 0.85Forged or milled surface: x 0.7–0.9

Intermittent machining: x 0.8–0.9Internal turning: x 0.8Unstable conditions: x 0.7–0.9Turning in E 470: x 0.7 (SS 2142)

The recommended preheating temperatures are based upon a heat input around 1.7 kJ/mm and that the hydrogen content does not exceed 5 ml/100 g weld metal.

Typical filler metals ESAB AWS EN

MMA OK 48.08 SFA/AWS A5.5 EN 499 E8018-G E 46 5 1Ni B 32 HS

MIG/ OK Autrod 12.64 SFA/AWS A5.18 EN 440MAG ER70S-6 G4Si1

SMAW OK Tubrod 14.05 SFA/AWS A5.28 EN 758 E70C-G T 42 4 Z M M 2 H10

Asia Pacific Phone: +65 96 759 052

Balkans, Greece and Cyprus Phone: +359 887 704733

Benelux Phone: +31 546 588 360

Bulgaria Phone: +359 887 704733

China Phone: +86 21 3366 2787

Czech Republic Phone +43 2682 90832

Finland Phone: +358 201 52155

France Phone: +33 3 8054 1515

Germany Phone: +49 211 25 040

Hungary Phone: +36 30 914 1920

Italy Phone: +39 51 690 0332

North America Phone: +1 803 802 1500

Poland Phone: +48 22 870 05 03

Romania Phone: +40 721 29 52 98

Russia Phone: +7 495 228 0780

Scandinavia Phone: +46 (0) 591 60 000

Slovakia Phone +43 2682 90832

United Kingdom Phone: +44 138 421 3940

MANUFACTURING

Ovako Sweden AB SE-813 82 Hofors Sweden Phone: +46 290 250 00

Nom. delivery size Guaranteed finished size, mmType OD wall ID Weight outer chucking inner chucking

mm mm mm kg/m OD ID OD ID

3020 30.7 6.10 18.5 3.70 30.0 20.0 29.20 19.20 CW

3525 35.7 6.10 23.5 4.47 35.0 25.0 34.20 24.20 CW

40204030

40.740.7

11.156.10

18.428.5

8.155.22

40.040.0

20.030.0

39.1039.20

19.1029.20

CWCW

452545304535

45.745.745.7

11.158.656.10

23.428.433.5

9.537.925.97

45.045.045.0

25.030.035.0

44.1044.1044.20

24.1029.2034.20

CWCWCW

50255030

50.750.7

13.6511.15

23.428.4

12.5110.90

50.050.0

25.030.0

49.1049.10

24.1029.10

CWCW

50355040

51.451.4

9.557.05

32.337.3

9.867.73

50.050.0

35.040.0

48.8048.80

34.0039.00

HRCW

5530553555405545

56.456.456.456.4

14.712.19.67.1

27.032.337.342.3

15.1213.1811.03

8.58

55.055.055.055.0

30.035.040.045.0

53.5053.8053.8053.80

28.7034.0039.0044.00

HRHRHRHR

6030603560406045

61.461.461.461.4

17.314.712.19.6

26.832.037.342.3

18.8216.9314.6712.21

60.060.060.060.0

30.035.040.045.0

58.3058.5058.8058.80

28.5033.7039.0044.00

HRHRHRHR

623462416251

63.663.663.6

16.312.37.4

31.139.148.9

18.9815.5110.20

62.262.262.2

34.241.851.6

60.6061.0061.00

32.8040.8050.60

HRHRHR

6535654065456550

66.466.466.466.4

17.414.712.19.6

31.737.042.347.3

20.9918.7416.1513.39

65.065.065.065.0

35.040.045.050.0

63.3063.5063.8063.80

33.4038.7044.0049.00

HRHRHRHR

70357040704570507055

71.471.471.471.471.4

20.017.414.712.19.6

31.536.742.047.252.3

25.3123.1320.5617.7014.57

70.070.070.070.070.0

35.040.045.050.055.0

68.0068.3068.5068.8068.80

33.2038.4043.7048.9054.00

HRHRHRHRHR

703870477057

71.671.671.6

18.313.88.4

35.044.054.8

24.0519.6713.09

70.270.270.2

38.446.957.6

68.4068.8069.00

36.7045.7056.50

HRHRHR

75407545755075557560

76.476.476.476.476.4

20.017.414.712.19.6

36.441.747.052.257.2

27.8225.2722.3719.1915.81

75.075.075.075.075.0

40.045.050.055.060.0

73.0073.3073.5073.8073.80

38.1043.4048.7053.9058.90

HRHRHRHRHR

HR = Hot rolled CW = Cold worked



804080458050805580608065

81.581.581.581.581.581.5

22.720.117.414.812.2

9.7

36.141.446.751.957.262.2

32.9230.3827.5124.3420.7817.10

80.080.080.080.080.080.0

40.045.050.055.060.065.0

77.8078.1078.4078.6078.9078.90

37.8043.1048.4053.6058.9063.90

HRHRHRHRHRHR

84478452

85.785.7

20.918.4

44.048.9

33.3530.54

84.284.2

47.752.4

82.2082.50

45.7050.60

HRHR

854585508555856085658570

86.586.586.586.586.586.5

22.720.117.514.812.2

9.7

41.146.451.656.962.267.2

35.7232.8629.7226.1722.2818.29

85.085.085.085.085.085.0

45.050.055.060.065.070.0

82.8083.1083.4083.6083.9083.90

42.8048.1053.3058.6063.9068.90

HRHRHRHRHRHR

9050895290559060906590709075

91.590.791.591.591.591.591.5

22.720.920.117.514.812.2

9.7

46.149.051.356.661.967.172.2

38.5235.9235.3931.8727.9923.8619.48

90.089.290.090.090.090.090.0

50.052.755.060.065.070.075.0

87.8087.2088.1088.4088.6088.9088.90

47.8050.7053.0058.3063.6068.8073.90

HRHRHRHRHRHRHR

9550955595609565957095759580

96.696.696.696.696.696.696.6

25.422.820.217.514.912.3

9.8

45.851.056.361.666.872.177.1

44.6041.5037.9934.1430.0225.4820.88

95.095.095.095.095.095.095.0

50.055.060.065.070.075.080.0

92.6092.9093.2093.4093.7094.0094.00

47.6052.8058.1063.4068.6073.9078.90

HRHRHRHRHRHRHR

1005010055100601006510070100751008010085

101.6101.6101.6101.6101.6101.6101.6101.6

28.125.422.820.217.614.912.3

9.8

45.550.856.061.366.571.877.182.1

50.8847.7344.3140.4836.3831.8626.9922.09

100.0100.0100.0100.0100.0100.0100.0100.0

50.055.060.065.070.075.080.085.0

97.4097.6097.9098.1098.4098.7098.9099.00

47.3052.6057.8063.1068.3073.6078.9083.90

HRHRHRHRHRHRHRHR

1055510560105651057010575105801058510590

106.7106.7106.7106.7106.7106.7106.7106.7

21.825.922.920.217.615.012.4

9.8

50.554.961.066.371.576.882.087.1

54.4751.6147.2543.0938.6733.8328.7423.42

105.0105.0105.0105.0105.0105.0105.0105.0

55.060.065.070.075.080.085.090.0

102.40102.70103.00103.20103.50103.70104.00104.00

52.3056.7062.8068.1073.3078.6086.8088.90

HRHRHRHRHRHRHRHR



110601106511166110701107511080110851109011095

111.7111.7112.7111.7111.7111.7111.7111.7111.7

28.225.525.422.920.317.615.012.4

9.8

55.460.761.966.071.276.581.887.092.1

58.0054.2154.6950.0745.6740.8435.6730.2624.63

110.0110.0111.0110.0110.0110.0110.0110.0110.0

60.065.066.270.075.080.085.090.095.0

107.40107.70108.70107.90108.20108.45108.70109.00109.00

57.2062.5063.7067.8073.0078.3083.6088.8094.00

HRHRHRHRHRHRHRHRHR

1156011565115701157511580115851159011595

116.7116.7116.7116.7116.7116.7116.7116.7

30.828.225.522.920.317.615.012.4

55.160.465.770.976.281.586.792.0

65.2561.4757.3552.9748.1743.0137.6231.78

115.0115.0115.0115.0115.0115.0115.0115.0

60.065.070.075.080.085.090.095.0

112.10112.40112.60112.90113.20113.40113.70113.90

56.9062.2067.5072.7078.0083.3088.5093.90

HRHRHRHRHRHRHRHR

117661177411782

118.8118.8118.8

28.524.520.0

61.969.978.9

63.3956.8948.63

117.0117.0117.0

66.574.182.7

114.40114.80115.30

63.7071.7080.70

HRHRHR

12065120701207512080120851209012095

120100

121.8121.8121.8121.8121.8121.8121.8121.8

30.928.225.623.020.317.715.112.4

60.165.470.675.981.286.491.797.0

69.2065.0960.7355.9550.8145.4439.6233.45

120.0120.0120.0120.0120.0120.0120.0120.0

65.070.075.080.085.090.095.0

100.0

117.20117.40117.70118.00118.20118.50118.70119.00

61.9067.2072.4077.7083.0088.2093.6098.90

HRHRHRHRHRHRHRHR

125701257512580125851259012595

125100125105125110

126.8126.8126.8126.8126.8126.8126.8126.8126.8

30.928.225.623.020.417.715.112.510.6

65.170.475.680.986.191.496.7101.9105.7

73.0068.5763.8958.7853.4247.6241.4835.1130.25

125.0125.0125.0125.0125.0125.0125.0125.0125.0

70.075.080.085.090.095.0

100.0105.0110.0

122.20122.40122.70123.00123.20123.50123.70124.00124.00

66.9072.2077.4082.7088.0093.3098.60

103.80107.70

HRHRHRHRHRHRHRHRHR

130701307513080130851309013095

130100130105

135.9135.9135.9135.9135.9135.9135.9135.9

33.630.928.325.723.120.417.815.2

64.870.175.380.685.891.196.4101.6

81.3776.9772.3067.2161.8856.1049.9743.62

130.0130.0130.0130.0130.0130.0130.0130.0

70.075.080.085.090.095.0

100.0105.0

127.00127.20127.50127.70128.00128.20128.50128.70

66.6071.9077.1082.4087.7093.0098.30

103.50

HRHRHRHRHRHRHRHR



1358013590

135100135110

136.9136.9136.9136.9

31.025.720.415.2

75.085.696.1106.6

80.8770.3758.6145.49

135.0135.0135.0135.0

80.090.0

100.0110.0

132.20132.70133.20133.80

76.8087.5098.00

108.60

HRHRHRHR

140751408013984140851409014095

140100140105140110140115

141.9141.9140.9141.9141.9141.9141.9141.9141.9141.9

36.233.631.031.028.325.723.120.417.815.2

69.574.778.980.085.390.595.8101.1106.3111.6

94.3589.7484.0284.6979.2873.6567.5661.1354.4847.36

140.0140.0139.0140.0140.0140.0140.0140.0140.0140.0

75.080.083.985.090.095.0

100.0105.0110.0115.0

136.65136.90136.20137.20137.40137.70138.00138.20138.50138.70

71.4076.6080.8081.9087.2092.4097.70

103.10108.30113.60

HRHRHRHRHRHRHRHRHRHR

14590145105145115145120

147.0147.0147.0147.0

31.023.117.915.2

85.0100.8111.3116.6

88.6870.5856.8549.41

145.0145.0145.0145.0

90.0105.0115.0120.0

142.20143.00143.50143.80

86.90102.80113.30118.70

HRHRHRHR

15080150851509015095

150100150105150110150115150120150125

152.0152.0152.0152.0152.0152.0152.0152.0152.0152.0

38.936.333.731.128.425.823.220.517.915.3

74.279.484.789.995.2100.5105.7111.0116.3121.5

108.50103.58

98.2192.6286.5780.1773.5666.4859.0551.43

150.0150.0150.0150.0150.0150.0150.0150.0150.0150.0

80.085.090.095.0

100.0105.0110.0115.0120.0125.0

146.40146.70146.95147.20147.50147.70148.00148.30148.50148.80

76.1081.3086.6091.8097.20

102.50107.70113.00118.40123.60


15590155100155115155125155130

157.1157.1157.1157.1157.1

36.431.123.218.015.3

84.494.9110.7121.2126.5

108.2596.6476.6161.6053.50

155.0155.0155.0155.0155.0

90.0100.0115.0125.0130.0

151.75152.30153.10153.60153.85

86.3096.90

112.70123.30128.60

HRHRHRHRHR

160851609016095

160100160105160110160115160120160125160130160135

162.1162.1162.1162.1162.1162.1162.1162.1162.1162.1162.1

41.739.036.433.831.128.525.923.220.618.015.3

78.884.189.494.699.9105.2110.4115.7120.9126.2131.5

123.72118.40112.73106.83100.47

93.7786.8679.4771.8963.8155.39

160.0160.0160.0160.0160.0160.0160.0160.0160.0160.0160.0

85.090.095.0

100.0105.0110.0115.0120.0125.0130.0135.0

156.20156.50156.70157.00157.30157.50157.80158.00158.30158.60158.80

80.7086.0091.3096.60

101.90107.20112.50117.80123.00128.30133.70

HRHRHRHRHRHRHRHRHRHRHR



165100165110165120165130

167.1167.1167.1167.1

36.431.125.920.6

94.3104.9115.4125.9

117.33104.31

90.0574.43

165.0165.0165.0165.0

100.0110.0120.0130.0

161.70162.20162.75163.30

96.30106.90117.50128.00

HRHRHRHR

17095170105170110170115170120170125170130170135170140170145

172.2172.2172.2172.2172.2172.2172.2172.2172.2172.2

41.736.533.831.228.625.923.320.718.115.4

88.899.3104.6109.8115.1120.4125.6130.9136.1141.1

134.20122.03115.36108.49101.14

93.4585.5677.1868.6259.55

170.0170.0170.0170.0170.0170.0170.0170.0170.0170.0

95.0105.0110.0115.0120.0125.0130.0135.0140.0145.0

166.25166.80167.00167.30167.60167.80168.10168.30168.60168.90

90.80101.30106.60111.90117.20122.50127.80133.10138.30143.60


180105180115180120180125180130180135180140180145180150180155180160

182.3182.3182.3182.3182.3182.3182.3182.3182.3182.3182.3

41.836.633.931.328.726.023.420.818.115.514.4

98.7109.2114.5119.8125.0130.3135.6140.8146.1151.4153.6

144.84131.38124.07116.41108.56100.22

91.5382.6773.2963.5759.44

180.0180.0180.0180.0180.0180.0180.0180.0180.0180.0180.0

105.0115.0120.0125.0130.0135.0140.0145.0150.0155.0157.1

176.30176.80177.10177.30177.60177.90178.10178.60178.65178.90179.00

100.70111.30116.60121.90127.20132.50137.80143.10148.40153.60155.90

HRHRHRHRHRHRHRHRHRHRHR

190130190140190145190150190160190165

192.3192.3192.3192.3192.3192.3

33.928.726.123.418.215.5

124.5135.0140.2145.5156.0161.3

132.43115.63106.80

97.4777.9567.58

190.0190.0190.0190.0190.0190.0

130.0140.0145.0150.0160.0165.0

187.00187.80187.80188.10188.60188.90

126.70137.20142.50147.80158.40163.70

HRHRHRHRHRHR

200125200135200140200145200150200160200165200170200180

202.4202.4202.4202.4202.4202.4202.4202.4202.4

43.036.734.031.428.823.520.918.215.3

116.4123.1134.4139.7144.9155.5160.7166.0174.0

169.04149.81141.20132.25123.12103.49

93.3582.6871.17

200.0200.0200.0200.0200.0200.0200.0200.0200.0

125.0135.0140.0145.0150.0160.0165.0170.0180.0

196.20196.80197.10197.30197.60197.90198.40198.60198.40

118.60131.30136.70142.00147.20157.90163.10168.40177.20

HRHRHRHRHRHRHRHRHR



210130210135210140210145210150210155210160210170210175210185

212.5212.5212.5212.5212.5212.5212.5212.5212.5212.5

44.642.039.436.734.131.528.823.620.919.1

123.3128.6133.8139.1144.3149.6154.9165.4170.7177.3

184.67176.44168.03159.11150.03140.42130.47109.74

98.7692.51

210.0210.0210.0210.0210.0210.0210.0210.0210.0210.0

130.0135.0140.0145.0150.0155.0160.0170.0175.0185.0

206.10206.30206.60206.80207.10207.40207.60208.15208.40208.60

125.50130.90136.10141.40146.60152.00157.30167.80173.20180.50

HRHRHRHRHRHRHRHRHR

HR*

220140220150220160220170220180

222.6222.6222.6222.6222.6

44.739.434.228.923.7

133.2143.8154.3164.8175.3

196.11178.01158.71138.05116.04

220.0220.0220.0220.0220.0

140.0150.0160.0170.0180.0

216.10216.60217.50217.70218.20

135.50146.20156.70167.30177.80

HRHRHRHRHR

230145230155230170230180230190230200

232.7232.7232.7232.7233.0233.6

47.442.234.329.023.922.4

137.9148.4164.2174.8185.3188.8

216.61198.07167.62145.47123.02116.67

230.0230.0230.0230.0230.0230.0

145.0155.0170.0180.0190.0200.0

225.90226.40227.20227.70228.50229.45

140.20150.80166.70177.30187.90191.40

HRHRHRHRHRHR

240175240190240200

246.3242.7242.7

40.929.025.8

164.5184.7191.2

207.00152.84137.77

240.0240.0240.0

175.0190.0200.0

235.90237.70238.20

168.70187.30197.90

HR*HRHR

250140250150250160250170250180250190250200250220

256.6256.6256.6256.6256.6256.6256.6256.6

65.460.054.649.243.838.533.122.8

125.7136.5147.3158.1168.9179.6190.4210.9

308.20290.64271.74251.35229.62206.56182.00131.46

250.0250.0250.0250.0250.0250.0250.0250.0

140.0150.0160.0170.0180.0190.0200.0220.0

242.40243.30244.10244.90245.70246.50247.30247.70

130.00140.80151.70162.50173.30184.00194.00215.30

HR* HR* HR* HR* HR* HR* HR* HR*

* Tolerance according to En 10294-1

Ovako develops high-tech steel solutions for, and in coopera-tion with, its customers in the bearing, transport and man-ufacturing industries. Our steel makes our customers’ end products more resilient and extends their useful life, ultimately resulting in smarter, more energy-efficient and more environ-mentally-friendly products. Our production is based on recycled scrap and includes steel in the form of bar, tube, ring and pre-components. Ovako has over 3,000 employees in more than 30 countries. Ovako’s sales in 2017 amounted to EUR 921 million. Since June 2018, Ovako is part of the Japanese steel corporation Nippon Steel & Sumitomo Metal Corporation that employs 92,000 globally and has a revenue of EUR 37 billion. For more information, please visit us at www.ovako.com and www.nssmc.com.

Ovako Sweden ABSE-813 82 Hofors, Sweden

Tel: +46 290 250 00

CO

-74

GB

18:1

0 ©O

vako

201

8

Stock sizes

mechanical properties, welding sales offices and

Documents