709M40T / EN 19
709M40T
EN 19
General
EN19 IS A HIGH-QUALITY ALLOY STEEL COMBINING EXCELLENT TENSILE STRENGTH, GOOD DUCTILITY, AND SHOCK RESISTANCE. IT IS IDEAL FOR HIGH-LOAD APPLICATIONS SUCH AS ENGINE GEARBOXES AND IS WIDELY USED IN THE AUTOMOTIVE AND OIL & GAS INDUSTRIES. THOUGH MORE CHALLENGING TO MACHINE, EN19 CAN ACHIEVE FINE DIMENSIONAL TOLERANCES AND IS WELL-SUITED TO APPLICATIONS WHERE STRENGTH AND PRECISION ARE CRITICAL.
Uses
AUTOMOTIVE GEARS AND PARTS, SHAFTS, TOWING PINS, LOAD BEARING TIE RODS, OIL & GAS INDUSTRY APPLICATIONS
Heat Treatment & Condition
COMMERCIALY AVAILABLE AS ROLLED, ANNEALED, "R", "S" AND "T" CONDITION
Chemical Analysis
C
·
0.36/0.44
Mn
·
0.70/1.00
Mo
·
0.20/0.40
S
·
0.05 MAX
Si
·
0.10/0.35
Cr
·
0.90/1.20
P
·
0.035 MAX
| C | Mn | Mo | S | Si | Cr | P |
|---|---|---|---|---|---|---|
| 0.36/0.44 | 0.70/1.00 | 0.20/0.40 | 0.05 MAX | 0.10/0.35 | 0.90/1.20 | 0.035 MAX |
Typical Mechanical Properties
CONDITION S
TEN. STRENTH
777-925 MPa
YIELD STRENGHT
555 MPa
ELONG.
12%
HARDNESS
223-277 HB
CONDITION T
TEN. STRENTH
850-1000 MPa
YIELD STRENGHT
650 MPa
ELONG.
13%
HARDNESS
248-302 HB
CONDITION U
TEN. STRENTH
925-1075 MPa
YIELD STRENGHT
755 MPa
ELONG.
12%
HARDNESS
269-331 HB
| CONDITION S | TEN. STRENTH | YIELD STRENGHT | ELONG. | HARDNESS | CONDITION T | TEN. STRENTH | YIELD STRENGHT | ELONG. | HARDNESS | CONDITION U | TEN. STRENTH | YIELD STRENGHT | ELONG. | HARDNESS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 777-925 MPa | 555 MPa | 12% | 223-277 HB | 850-1000 MPa | 650 MPa | 13% | 248-302 HB | 925-1075 MPa | 755 MPa | 12% | 269-331 HB |