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DD ENV 1090 Part 6 is the new fabrication and erection specification for stainless steel. It covers austenitic and duplex stainless steels used in buildings and other similar steel structures.
BS EN 10269 is the material standard for stainless and heat-resisting steels, a selection of low alloy steels and some nickel alloys for fasteners. The ambient temperature mechanical properties shown in this article include 0.2% proof strength, tensile strength, elongation, reduction in area and impact (charpy) strength in the finally heat treated condition. Specified hardness levels for the steels for subsequent quenching and tempering (1.4923 1.4938 and 1.4913) in their delivery condition are also included.
BS EN 10283 is the material standard for stainless steel castings for corrosion resisting purposes. The chemical composition of stainless steel grades covered in the this standard include 1.4011 1.4008 1.4317 1.4405 1.4411 1.4525 1.4309 1.4308 1.4552 1.4409 1.4408 1.4581 1.4412 1.4446 1.4458 1.4527 1.4584 1.4416 1.4587 1.4588 1.4593 1.4347 1.4470 1.4468 1.4517 1.4417 and 1.4469.
BS 3100 is the material standard for stainless steel castings for corrosion resisting purposes. The chemical composition of stainless steel grades covered in the this standard include 410C21 420C28 420C29 425C12 425C11 302C25 304C12 304C15 347C17 316C12 316C16 317C16 318C17 332C11 332C13 332C15 420C24 452C11 452C12 302C35 309C30 309C40 310C45 311C11 330C12 331C60 334C11 309C32 309C35 310C40 330C11 331C40
ASTM standards A297, A351, A743, A744 and A890 specify castings for corrosion and heat-resisting service. These include stainless steels and some nickel based alloys. The grade designations used in these standards are those originally developed by the ACI, the Alloy Casting Institute. (Now the Steel Founder’s Society of America). The chemical composition of stainless steel grades covered by these standards include ACI grade designations CA6N CA6NM CA15 CA15M CA28MWV CA40 CA40F CB6 CB30 CB7Cu-1 CB7Cu-2 CC50 CD3MCuN CD3MN CD3MWCuN CD4MCu CD6MN CE20N CE3MN CE30 CE8MN CF3 CF8 CF8C CF20 CF3M CF3MN CF8M CF8C CF10 CF10M CF10MC CF10SMnN CF16F CF16FA CG6MMN CG3M CG8M CG12 CH8 CH10 CH20 CK20 CK3MCuN CK35MN CN3M CN3MN CN7M CN7MSCT15C HC HD HE HF HH HI HK HK30 HK40 HL HN HP HT HT30 HU HW HX. Duplex castings grades 1A 1B 1C 2A 3A4A 5A 6A are also listed and cross references to wrought AISI grades 410 420 304L 304 347 302 316L 316LN 316 317 317L 309 310 made. Common grade names are also cross referenced and include 17/4PH 15/5PH 2205 Zeron 100 Alloy 958 Escoloy 254SMO and AL-6XN
BS 3146-2 is the material standard for castings, to be made by the investment (or lost wax) process and includes some stainless steels. The chemical composition of stainless steel grades covered in the this standard include ANC1-A ANC1-B ANC1-C ANC2 ANC3-A ANC3-B ANC4-A ANC4-B ANC4C ANC5-A ANC5-B ANC5-C ANC6-A ANC6-B ANC6-C ANC20A ANC20B and ANC21
Stainless steel can be cut and profiled in the same way and using the same type of equipment as for most types of steel. The high work hardening rates of austenitic stainless steels means that tool/machinery capability and rigidity requirements are higher than for carbon steels. The techniques for sawing, shearing, plasma cutting, blanking, punching and piercing are discussed.
The influence of nickel content on deep drawing and stretch forming capability in austenitic grades 304, 305 and 316 are discussed. The affects on magnetic permeability and ‘orange peel’ after forming are mentioned.
Austenitic stainless steels are generally non-magnetic with relative magnetic permeabilities of around 1.0. Cold working can partially transform the austenitic phase to martensite, leading to higher magnetic permeabilities, for example at sharp corners, sheared edges or machined surfaces. The increase in permeability can be reversed by full solution annealing.
BS EN 10269 is the material standard for stainless and heat-resisting steels, a selection of low alloy steels and some nickel alloys for fasteners. The elevated and sub-zero temperature mechanical properties shown in this article include 0.2% proof, tensile and impact (charpy) strengths.