06/29/17 $0. US = $1 CAN

LETH IRON MATERIAL SPECIFICATIONS


DUCTILE IRON

ASTM A536 - 84
Grade Min. Tensile (psi) Min. Yield (psi) Elongation (%) Typical HBW
60-40-18 60,000 40,000 18 140 - 190
65-45-12 65,000 45,000 12 160 - 220
70-50-09 70,000 50,000 9 170 - 230
80-55-06 80,000 55,000 6 190 - 260
100-70-03 100,000 70,000 3 240 - 310

DUCTILE IRON

ASTM A395 - 99 (castings of this specification will be annealed to a ferritic structure)
Grade Min. Tensile (psi) Min. Yield (psi) Elongation (%) Typical HBW
60-40-18 60,000 40,000 18 143 - 187

About 75% of our production is Ductile Iron. LETH IRON was one of the first foundries in North America to pour this unique material in the early 1960's. Ductile Iron provides excellent strengths, great value and is very machinable. Strengths meeting or exceeding mild and low alloy steel castings at approximately half the cost make this iron very popular. In addition, Ductile Iron offers improved cosmetics and dimensional stability in comparison to steel castings. Due to the higher carbon value in iron, please note we do not recommend welding Ductile Iron (or any other iron).


AUSTEMPERED DUCTILE IRON [ADI]

ASTM A897 - 06 (castings of this specification are heat treated by an austempering process)
Grade Min. Tensile (psi) Min. Yield (psi) Elongation (%) Typical HBW
110-70-11 110,000 70,000 11 241 - 302
130-90-09 130,000 90,000 9 269 - 341
150-110-07 150,000 110,000 7 302 - 375
175-125-04 175,000 125,000 4 341 - 444
200-155-02 200,000 155,000 2 388 - 477
230-185-01 230,000 185,000 1 402 - 512

About 5% of our production is Austempered Ductile Iron (ADI). A sophisticated heat treatment and quench doubles the strength of Ductile Iron castings while maintaining elongation strengths. Gains in casting hardness also provide attractive wear properties. ADI can normally be machined before heat treating, but may require some minor post heat treatment machining to hold very tight machining tolerances. Use of this exciting and relatively new material is growing quickly!


ABRASION RESISTANT IRON

ASTM A532 - 93a ("HIGH CHROME - YC")
Class/Type % Chrome Typical HBW
Class III
Type A
27% Chrome 550 - 700

About 10% of our production is Hi-Chrome Iron. This material is relatively brittle, but provides superior abrasion resistance compared to any other wear resistant iron casting. Hardness exceed 600 HBW.This material is used extensively in ground engaging wear applications and in the mining & aggregate industries.


CARBIDIC AUSTEMPERED DUCTILE IRON (CADI)

ASTM - n/a
Strength Requirements Typical HBW
Strengths (tensile, yield and elongation) are not specified
for CADI and are secondary to hardness requirements.
500 - 600 (10-30% Carbides)

This new material provides superior wear characteristics due to its increased hardness, but exhibits less strength and elongation when compared to ADI. CADI also has higher impact resistance versus High Chrome Iron, but It does not offer the superior abrasion resistance that High Chrome Iron provides.



LETH IRON.
FLUENT IN IRON.
720 32nd Street North, Lethbridge, AB T1H 5K5
ph: (403) 329-4242
fax: (403) 327-1131