Alloy Steel Bar

Minimum Order Quantity

200 Kilogram

Single Piece Length

3 - 18 Meter

Usage/Application

Construction

Shape

Round

Surface Finish

Galvanized

Material

Alloy Steel

Thickness/Diameter

6 - 450 mm

Standard

Grade

C

Mn

P

S

Si

Ni

Cr

Mo

ASTM A29

4340

0.38-0.43

0.60-0.80

0.035 max

0.040 max

0.15-0.35

1.65-2.00

0.70-0.90

0.20-0.30

EN 10250

36CrNiMo4 / 1.6511

0.32-0.40

0.50-0.80

0.035 max

0.035 max

0.40 max

0.90-1.20

0.90-1.2

0.15-0.30

BS 970

EN24 / 817M40

0.36-0.44

0.45-0.70

0.035 max

0.040 max

0.10-0.40

1.30-1.70

1.00-1.40

0.20-0.35

JIS G4103

SNCM 439 / SNCM 8

0.36-0.43

0.60-0.90

0.035 max

0.030 max

0.15-0.35

1.60-2.00

0.60-1.00

0.15-0.30

Thermal Conductivity at °C

W / (m*K)

20

40.5

350

32.5

700

25.5

Soft Annealing °C

650-700

Cooling

Slowly

Hardness HB

max. 280

Stress-relief Annealing °C

630-650

Cooling

Furnace

1st Pre-Heating °C

up to approx. 400 in an air-circulating furnace

2nd and 3rd

780 and 1000

Hardening °C

1190-1230

Quenching

Salt Bath, at least 520°C Oil, Air

Tempering °C

at least twice 530-560