Steel Specifications
H.I Quality Steel Castings can supply steel to a full range of specifications. We are pleased to offer expert advice on steel chemistry and achievable mechanical properties taking account of service environment, weldability and casting geometry and section size. Close analytical control of steel chemistry is followed by heat treatment with facilities for solution treatment, annealing, normalising and hardening and tempering.
The range of steels catered for is as follows:
| Plain carbon and carbon manganese steels for general engineering purposes, variants for low temperature applications and steels requiring good weldability. | |||||||||
| 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 | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.25 |
0.35 |
1.5 |
0.02 |
0.025 |
Residual |
- |
||
| Mechanical properties / Heat treatment: Normalised or quenched and tempered. | |||||||||
Yield MPa |
UTS |
Charpy impacts J@20°C |
Comments: Higher
carbon contents will give more strength but lower
toughness. Lower carbon quenced and tempered versions
will give good combination of strength and toughness.
Strengths and low temperature toughness in Q&T
steels can be improved with alloying additions. Low
carbon NiMo grades for offshore applications offer
good weldability and Charpys at -40°C |
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| Typical | 300 |
520 |
27 |
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| Weldability: C <0.25% for good weldability, Higher C contents weldable with care and good control of preheat and PWHT. | |||||||||
| Wear Resistant and surface hardening grades | |||||||||
| Typical Specifications: BS3100 AW2, AW3 (1Cr BW2 to 4) | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.5 |
0.45 |
1 |
0.02 |
0.03 |
- |
- |
- |
- |
| BW10 | 1 |
0.45 |
12.5 |
0.05 |
0.05 |
- |
- |
- |
- |
| Comments: Steels suitable to surface hardening through heat treatment. Similar 1% chromium bearing steels are also available giving higher hardness and better depth of hardness for low shock high wear applications. Low carbon AW1, AW2 type steels are available for surface hardening by carburising. Manganese work hardening steels (BW10) are employed in conditions of severe wear combined with impact. | |||||||||
| Chromium Molbdenum and Chromium Molybdenum Vanadium steels for use at high temperatures. | |||||||||
| Typical Specifications: BS3100 B1 to B7, ASTM A217 WC1:WC6:WC9:C5:C12. DIN/EN GS17CrMo5-5, GS17CrMo9-10 | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.17 |
0.35 |
0.75 |
0.02 |
0.025 |
2.25 |
0.40 |
1.00 |
- |
| Mechanical properties / Heat treatment: Normalised and tempered or oil quenched and tempered. | |||||||||
Yield MPa |
UTS |
Charpy impacts J@20°C |
Comments: 1CrMo
and 1/2 CrMo steels are alloyed with vanadium to
promote stable precipitates giving good creep resistance
at higher temperatures (450°C to
550°C). For higher temperatures
higher Cr (3 Cr 5Cr, 9Cr) variants are preferred
or more complex Nb, W, Cu, Co bearing grades. |
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| Typical | 275 |
450 |
25 |
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| Weldability: Weld with matching consumable under strict parameter control. | |||||||||
| Higher Strength Steels | |||||||||
| Typical Specifications: BS3100 BT1:BT2:BT3, ASTM A148 Gr90-60:115-95 EN:GS25CrMo4 | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.28 |
0.35 |
0.75 |
0.02 |
0.025 |
1 |
0.50 |
0.25 |
- |
| Mechanical properties / Heat treatment: Normalised, quenched and tempered. | |||||||||
Yield MPa |
UTS |
Charpy impacts J@20°C |
Comments: Good general
purpose higher strength steels. Specifications for
these steels have an "open analysis" and
consideration has to be given to the engineering
application when determining correct chemistry. |
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| Typical | 580 |
850 |
25 |
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| Weldability: Weld only with strict control of preheat parameters and PWHT. | |||||||||
| Nickel Chromium Molybdenum steels with good combination of strength and toughness. Higher hardenability materials for larger castings. Materials suitable for pressure containing parts and Marine applications. | |||||||||
| Typical Specifications: BS3100 BT2, ASTM A487Gr4 and 10 DIN/EN GS25NiCrMo8-5-4. DNV R4 | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.15/0.25 |
0.35 |
0.85 |
0.01 |
0.020 |
1/1.5 |
2.50/3.75 |
0.35 |
- |
| Mechanical properties / Heat treatment: Normalised or quenched and tempered. | |||||||||
Yield MPa |
UTS |
Charpy impacts J@-20°C |
Comments: Higher
alloy contents improve both hardness and hardenability.
These steels develop high strength and have excellent
toughness at low temperatures |
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| Typical | 550 |
860 |
50 |
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| Weldability: Good with careful parameter control | |||||||||
| 13 Chromium and Chromium Nickel Molybdenum steels for use in mildly corrosive environments. | |||||||||
| Typical Specifications: BS3100 410C21, 420C29, 425C11, ASTM A743: CA15, CA6NM, DIN/EN:GX4CrNi13-4 | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.04 |
0.35 |
0.6 |
0.02 |
0.025 |
13 |
4.00 |
0.35 |
- |
| Mechanical properties / Heat treatment: Normalised and tempered or oil quenched and tempered. | |||||||||
Yield MPa |
UTS |
Charpy impacts J@0°C |
Comments: 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. |
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| Typical | 550 |
755 |
35J |
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| Weldability: Good | |||||||||
| Stainless steels for use in corrosive environments. | |||||||||
| Typical Specifications: Type 304 and 316 and Duplex steels. ASTM A743 CF8/CF8M, ASTM A890 grades | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.06 |
0.75 |
1.7 |
0.04 |
0.040 |
18 |
8.00 |
0.35 |
- |
| Typical | 0.06 |
0.75 |
1.7 |
0.04 |
0.040 |
19 |
9.00 |
2.50 |
|
| Typical | 0.03 |
0.75 |
0.7 |
0.04 |
0.040 |
25 |
5.00 |
2.00 |
Cu, N |
| Mechanical properties / Heat treatment: Solution treat and quenched. Particulars depend on composition | |||||||||
Yield MPa |
UTS |
Charpy impacts J@20°C |
Comments: 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. |
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| Typical | 205 |
485 |
- |
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| Weldability: Generally good when microstructures contain small amounts of ferrite. | |||||||||
Chromium
Nickel and Nickel Chromium steels for high temperature
service. |
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| Typical Specifications: BS3100 302C35 to 330C12, ASTM A297 HF:HK:HP types. | |||||||||
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Other |
|
| Typical | 0.3 |
1.5 |
1.5 |
0.04 |
0.04 |
20 |
10 |
- |
- |
| Typical | 0.35 |
1.5 |
1.5 |
0.04 |
0.040 |
26 |
20.00 |
- |
- |
| Typical | 0.4 |
2 |
1 |
0.03 |
0.030 |
25 |
35.00 |
- |
Nb |
| Mechanical properties / Heat treatment: As cast or as agreed on case by case basis. | |||||||||
Yield MPa |
UTS |
Stress
rupture and limiting creep stress criteria apply |
Comments: Alloy
choice is influenced by operating conditions particularly
service temperature and thermal cycling. All these
alloys have documented long time stress to rupture
and limiting creep stress data, over operational
temperature ranges. |
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| Typical | 220 |
450 |
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| Weldability: Difficult to weld. Careful choice of consumable and specific welding controls are called for. | |||||||||
