Materials in Brief & Special Alloys
Steels for Mildly Corrosive Environments: 13 Chromium and Chromium Nickel Molybdenum
Ferritic mildly corrosive resistant steel with wide ranging applications. The 0.15%C, 13%CR, 1%Mo version has lower strength, toughness and poorer weldability.
- Typical Specifications: BS3100 410C21, 420C29, 425C11, ASTM A743: CA15, CA6NM, DIN/EN:GX4CrNi13-4
- Properties & Heat treatment: Normalised and tempered or oil quenched and tempered.
- Weldability: Good
|
C
|
Si
|
Mn
|
S
|
P
|
Cr
|
Ni
|
Mo
|
Other
|
Yield
MPa |
UTS
MPa |
Charpy impacts
J@0°C |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Typical
|
0.04
|
0.35
|
0.6
|
0.02
|
0.025
|
13
|
4.00
|
0.35
|
–
|
550
|
755
|
35J
|
Stainless Steels Corrosive Environments.
A wide range of alloy compositions exist to suit particular service environments and engineering requirements. Duplex steels offer a combination of corrosion resistance and higher strength levels. Predominantly austenitic steels are required for severe service environments.
- Typical Specifications: Type 304 and 316 and Duplex steels. ASTM A743 CF8/CF8M, ASTM A890 grades.
- Properties & Heat treatment: Solution treat and quenched. Particulars depend on composition.
- Weldability: Generally good when microstructures contain small amounts of ferrite.
|
C
|
Si
|
Mn
|
S
|
P
|
Cr
|
Ni
|
Mo
|
Other
|
Yield
MPa |
UTS
MPa |
Charpy impacts
J@0°C |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Typical |
0.06
|
0.75
|
0.7
|
0.04
|
0.040
|
18
|
8.00
|
0.35
|
–
|
205
|
485
|
– |
| Typical |
19
|
9.00
|
2.50
|
|||||||||
| Typical |
25
|
5.00
|
2.00
|
Cu, N
|
Steels for General Engineering: Plain Carbon & Carbon Manganese
Higher carbon contents provide greater strength but lower toughness. Lower carbon quenced and tempered versions provide a good combination of strength and toughness. Strengths and low temperature toughness can be improved with alloying additions. Low carbon NiMo grades for offshore applications offer good weldability and Charpys at -40°C
- Typical Specifications: BS3100, A1:A2:A3:A4:A5:A6, ASTM A27, A216WCB, WCC, A148 70-40 and 80-50, ASTM A352 LCA, LCB, LCC, DIN/EN GS52, GS20 Mn5, GS24Mn6V
- Properties & Heat treatment: Normalised or quenched and tempered.
- Weldability: C <0.25% for good weldability, Higher C contents weldable with care and good control of preheat and PWHT.
|
C
|
Si
|
Mn
|
S
|
P
|
Cr
|
Ni
|
Mo
|
Other
|
Yield
|
UTS
MPa |
UTS
MPa |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Typical |
0.25
|
0.35
|
1.5
|
0.04
|
0.025
|
Residual
|
–
|
300
|
520
|
520
|
||
International Specifications Equivalent to EN 1563:1997
Mechanical properties as measured on separately cast test bars.
| Material Designation EN 1563 |
UK
BS 2789 1985 |
Germany
DIN 1693 1973 |
Netherlands
NEN 6002-D 1966 |
Italy
UNI 4544 1979 |
Sweden
SS 1407 1981 |
USA
ASTM A536 1993 |
international
ISO 1083 1987 |
|
|---|---|---|---|---|---|---|---|---|
| Symbol | Number | |||||||
| EN-GJS 350-22 | EN JS1010 | 350-22 | 350-22 | |||||
| EN-GJS 350-22LT | EN JS1015 | 350-22L40 | GGG 35.3 | GN 38 | GS 370-17 | 17-15 | 350-22L | |
| EN-GJS 400-18 | EN JS1020 | 400-18 | GN 42 | 60-40-18 | 400-18 | |||
| EN-GJS 400-18LT | EN JS1025 | 100-18L20 | GGG 40.3 | 17-02 | 400-18L | |||
| EN-GJS 400-15 | EN JS1030 | 420-12 | GGG 40 | GS 400-12 | 17-00 | 65-45-12 | 400-15 | |
| EN-GJS 450-10 | EN JS1040 | 450-10 | 70-50-05 | 450-10 | ||||
| EN-GJS 500-7 | EN JS1050 | 500-7 | GGG 50 | GN50 | GS 500-7 | 27-02 | 80-55-06 | 500-7 |
| EN-GJS 600-3 | EN JS1060 | 600-3 | GGG 60 | GN60 | GS 600-3 | 32-03 | 100-70-03 | 600-3 |
| EN-GJS 700-2 | EN JS1070 | 700-2 | GGG 70 | GN70 | GS 700-2 | 37-01 | 700-2 | |
| EN-GJS 800-2 | EN JS1080 | 800-2 | GGG 80 | GN80 | GS 800-2 | 120-90-02 | 800-2 | |
| EN-GJS 900-2 | EN JS1090 | 900-2 | 900-2 | |||||