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STEEL EQUIVALENTS- PLAIN CARBON STEELS

AS1442AS1448A.I.S.I.SAE

BS 970 1955 Typical analysisSimilar Specifications, Other

Equivalents Or NamesTypical Uses

K1022 EN3A .22%C .8%Mn

Bohler WH;Mild Steel; AS1204-350; ASTM A350 LF1 Lloyds 28-

32, J9, K class; ASTM A 181;ASTM A350 LF2; ABS Gr 11AS1448-K1; ASTM A105;

BS 1503 161-28 - Pneuloca

Constructional grade, used in pipe andpressure vessel fittings, ship shaftingand couplings and general engineeringapplications with low stresses. Weldable

K1040 EN8 .4%C .8%MnT Class; AS1448-K5

J3 - Durax

Machinery steel with 35-45 TSI. UTS.Suitable for shafts, crankshafts, gears

requiring heat treatment and/or flame orinduction hardening

K1045 .45%C .8%MnBohler H; J12

M Class: AS1488-K6 -Duraflex

Similar applications to K1040, Shallowhardening steel. Can be welded if correct

procedures are used

K1055 EN9 .55%C .8%MnC Class Tyre;J2 - Superflex

Used for shafts and gears wheremoderate wear resistance is required and

where toughness is not essential.Suitable for track tyres when heat

treated.

STEEL EQUIVALENTS-GENERAL ENGINEERING ALLOY STEELS

AS1442AS1448A.I.S.I.SAE

BS 9701955

Typical AnalysisSimilar Specifications, Other

Equilvalents Or NamesTypical Uses

4140 EN19.4%C 1%Cr

.2%Mo

Assab 709; DIN 42Cr Mo4;Chromol Bohler VCL 140;

E & G SD19; O5

Very suitable for highly stressed gears,shafts, requiring a combination of

hardness and toughness, suitable forsurface flame or induction hardening.

4340 EN24.4%C .8%Cr

1.7%Ni .2%Mo

Bohler NMH; R16;VAGS

Assab 705

A steel with a good hardenability whichcan be heat treated to a wide range of

tensile strengths combined withtoughness. Suitable for highly stressedgears, shafts, bolts and machine parts.

8620 EN362.2%C .5%Cr

.6%Ni .2%MoCH362

R23

Low alloy, low hardenability casehardening steel for lightly stressed

components. Offers a tougher core thana plain carbon steel. Can be used as a

heat treatable steel and offers reasonableweldability.

EN25.3%C .6%Cr

2.6%Ni .6%Mo

E & G SD50; DIN 34CrNiMo6; Vibrac 30; Bohler

VCN 150; R4

A high strength alloy steel with highhardenability, toughness and fatigue

resistance. Can be surface hardened andhas good machinability in the annealed

condition. Used for gears, shafts, axles of

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large section.

EN 26.4%C .6%Cr

2.6%Ni .6%MoVibrac 45

R5

Similar to EN25 but offers higherhardness, and wear resistance in

severely loaded applications.

STEEL EQUIVALENTS-CASE HARDENING STEELS

SAE orA.I.S.I.,

DIN

BS 9701955

Typical AnalysisSimilar Specifications, Other

Equivalents Or NamesTypical Uses

X3312H EN36A.1%C 3.5%Ni

.8%Cr

E & G SD51; DIN 14Ni Cr14Bohler ES Special; Q5;

CHCN55

Suitable for highly stressed gears andshafts. Also used for die rings and

moulding rings.

X9315H EN39B.15%C 4%Ni

1.2%Cr .25%Mo

DIN 14Ni Cr18; Super CHCNBohler PPA; R10

Used in components where a very highcore strength and shock resistance is

essential in large sections. Applicationsinclude heavy duty gears, worm gears

and plastic moulds.

17CrNiMo6

.15%C 1.6%Cr1.5%Ni .3%Mo

Heavy duty gears, bearings, sleeves,Kingpins, bushes, arbors, pinions, piston

pins, ratchets, splined shafts,transmission shafts, plastic moulds, etc..

STEEL EQUIVALENTS-NITRIDING STEELS

SAE orA.I.S.I.,

DIN

BS 970 1955

Typical AnalysisSimilar Specifications, Other

Equivalents Or NamesTypical Uses

EN40B.25%C 3%Cr

.6%MoHykro

Offers a medium strength core combinedwith good ductility and shock resistance.Nitriding produces a very hard wearresistant surface

EN41A.3%C 1.5%Cr.2%Mo 1%Al

DIN 27Cr Al 16; Nitralloy; Gr5bohler ACE; S3

This steel has a lower hardenability andductility than EN40B but offers an

extremely hard wear resistant surface.Can be used for gears, crankshafts,

cylinder liners and moulds