Shandong Xinhuai pipe industry to provide mechanical properties of alloy steel pipe
No.
Grade
Recommended heat treatment system
Tensile properties
Quenching (normalizing)
Tempering
Tensile strength Rm/Mpa
Lower yield strength Relf/Mpa
Elongation after fracture
A/%
Temperature, °C
Coolant
Temperature, °C
Coolant
the first time
the second time
not less than
1
40Mm2
840
-
Water, oil
540
Water, oil
885
735
12
2
45Mm2
840
-
Water, oil
550
Water, oil
885
735
10
3
27SiMn
920
-
water
450
Water, oil
980
835
12
4
30Cr
860
-
oil
500
Water, oil
885
685
11
5
35Cr
860
-
oil
500
Water, oil
930
735
11
6
40Cr
850
-
oil
520
Water, oil
980
785
9
7
12CrMo
900
-
air
650
air
410
265
twenty four
8
15CrMo
900
-
air
650
air
440
295
twenty two
9
35CrMo
850
-
oil
550
Water, oil
980
835
12
10
42CrMo
850
-
oil
560
Water, oil
1080
930
12
11
12CrMoV
970
-
air
750
air
440
225
twenty two
12
12Cr1MoV
970
-
air
750
air
490
245
twenty two
13
20CrMn
850
-
oil
200
Water, air
930
735
10
14
40CrNiMoA
850
-
oil
600
Water, oil
980
835
12
15
45CrNiMoVA
860
-
oil
460
oil
1470
1325
7
The heat treatment temperature listed in Table A allows the adjustment range: quenching ±20°C, low temperature tempering ±30°C, high temperature tempering ±50°C.
B-boron steel can be normalized before quenching and the normalizing temperature should not be higher than its quenching temperature.
C. Delivery according to a set of data specified by the demander; when the demander has not specified, delivery can be made according to any of the sets of data.
D. The first quenching of chromium-containing manganese-titanium steel can be replaced by normalizing.
E is austempered at 280-320°C.
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