Structural Steel.

Commercial Quality

For general engineering work that does not require specified mechanical properties.

Test certificate is available, stating Chemical Analysis, no mechanicals.

May be produced to SAE specs. May be welded and subjected to “Moderate”

forming. What a customer usually wants when asking for

“Mild Steel.

Commercial Quality

Should only be used where no specific mechanical requirements exist.

Not recommended for structures where any danger of “catastrophic failure” exists.

There is very little recourse to the mill in the event of failures.

Structural Steels.

Used where chemical and mechanical properties are required and specified.

Always supplied with test certificates. Available in plate, sheet, sections, tube etc. May be grouped in Low, Medium and High Strength

structural steels.

Structural Steels

Used where structural properties are required. Engineers can design, using these properties.

With correct design and guaranteed structural steel, failures should be avoided.

Using steels of higher Yield and Toughness, allows thinner steel & hence, lighter structures.

The New Specs.

BS 4360

SANS 1431

SANS50025EN10025

43A

300WA

S275JR50B

350WA

S355JR

Grades

SteelSteel YieldYield TensileTensile ImpactImpact

43A43A 275275 430/580430/580

300WA300WA 300300 430/580430/580

S275S275 275275 430/580430/580

350WA350WA

350WC350WC350350

350350490/640490/640

490/640490/640 27J @ 2027J @ 20

50C50C

S355JRS355JR350350

350350490/640490/640

490/640490/64027J @ 027J @ 0

27L@ 2027L@ 20

CortenCorten 350350 480480

Sup TMSup TM 190-500190-500 Up to Up to 560560

RT 700RT 700 700700 780/930780/930 27J@ -5027J@ -50

BS 4360: 1986BS 4360: 1986 EN 10025: 1993EN 10025: 1993 SANS 1431SANS 1431 SANS 50025 / EN SANS 50025 / EN 1002510025

Gr 40 AGr 40 A

S 235 JRS 235 JR 240WA240WA S 235 JR+ARS 235 JR+AR

Gr 40 BGr 40 B S 235 JR G2S 235 JR G2

Gr 40 CGr 40 C S 235 JOS 235 JO 240WC240WC S 235 JOS 235 JO

Gr 40 DGr 40 D S 235 J2 G3S 235 J2 G3 240WDD240WDD S 235 J2+NS 235 J2+N

Gr 43 AGr 43 A

Gr 43 BGr 43 B S 275 JRS 275 JR S 275 JR+ARS 275 JR+AR

Gr 43 CGr 43 C S 275 JOS 275 JO S 275 JOS 275 JO

Gr 43 DGr 43 D S 275 J2 G3S 275 J2 G3 S 275 J2+NS 275 J2+N

NONENONE NONENONE 300WA300WA NONENONE

Gr 50 AGr 50 A

Gr 50 BGr 50 B S 355 JR S 355 JR 350WA350WA S 355 JR+ARS 355 JR+AR

Gr 50 CGr 50 C S 355 JOS 355 JO 350WC350WC S 355 JOS 355 JO

Gr 50 DGr 50 D S 355 J2 G3S 355 J2 G3 350WDD350WDD S 355NS 355N

S 355 J2 G4S 355 J2 G4 (AR or N)(AR or N)

Gr 50 DDGr 50 DD S355 K2 G3S355 K2 G3 S355NLS355NL

Specification Comparison

Impact Requirements

JR = 20degC (or none) JO = 0 degC J2G3 = -20 degC. N = Normalised. E (Prefix) Engineering Grade.

Strength of Steels

0

100

200

300

400

500

600

700

800

900

43A 50B TM380 TM500 RoqTuf

Yield S

Tens. S

Domex.S275 S355

S700MC

WHAT IS COR-TENWHAT IS COR-TEN®® ? ?

• Description Cor-Ten® is a high strength low alloy weathering steel conforming to ASTM A242 Type 1. It derives improved corrosion resistance compared with carbon steel by the formation of a stable, adherent patina of corrosion product under suitable exposure conditions, inhibiting further corrosion attack.Cor-Ten® is a registered trademark of USX Corporation

Steel C Si Mn P S Cr Ni Cu V Nb Al

Cor-Ten® 0.06-0.10

0.30-0.40

0.30-0.50

0.08-0.10

0.01 0.75-0.90

0.45-0.50

0.30-0.35

0.01 - 0.02-0.04

300 WA 0.22 0.50 1.60 0.05 0.05 - - 0.35 0.10 0.10 0.10

WR50 0.1-0.19

0.15-0.50

0.90-1.25

0.04 0.05 0.40-0.70

- 0.25-0.40

0.02-0.10

- 0.01-0.06

Pressure Vessel Grades

SANS50028 EN10028 Replaces BS1501

Grade 430A = P265GH,

Also P235GH, P265GH & P295GH

High Strength, formable, sheet

There is a great deal of development around hot rolled thermo-mechanically rolled, inclusion shape controlled sheet, in thickness 2mm –12mm.

From hot strip mills, and particularly for the motor, materials handling and trailer industry.

Grades from 400 –700Mpa Yield Strength. These steels give mass saving advantages and are very

formable and weldable.

Advantages

Mass reduction possible Possibility of replacing more expensive Quenched

and Tempered plate (up to 10mm) Steel available with better resistance to mechanical

damage.

Supraform –Spec. Changes

Supraform TM290 and TM340 to be replaced by S315MC

Supraform TM380 to be replaced by S355MC

Supraform TM460 to be discontinued.

Supraform TM500 to be replaced by S460MC.

Supraform TM600 to be replaced by S550MC

S700MC already available ex import, Mittal to continue development.

The New Product Range

Spec.Spec. SupraformSupraform

315MC/315MC/EN10149-2 EN10149-2 S315MCS315MC

SupraformSupraform

355MC/355MC/EN10149 -2 EN10149 -2 S355MCS355MC

SupraformSupraform

420MC/420MC/EN10149-2 EN10149-2 S420MCS420MC

SupraformSupraform

550MC/550MC/EN10149-2 EN10149-2 S550MCS550MC

Quality Quality CodeCode

556 000556 000 557 000557 000 550 000550 000 530 000530 000

Slab WidthsSlab Widths 13001300 960;1300;960;1300;

1600;18701600;1870960;1300;960;1300;

160016001300;16001300;1600

ThicknessThickness

RangeRange2,0 - 6,02,0 - 6,0 2,0 – 10,02,0 – 10,0 2,5 – 10,02,5 – 10,0 3,0 – 8,03,0 – 8,0

High Strength Steels.

RULE OF THUMB FOR MASS SAVINGS>

t2

t1

Re1

Re2

t= Thickness

Re= Yield Strength

1 = Reference Steel

2 = High Strength Substitute.

Don’t over design!