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IS 11169 (Part 1):1984 38Cr4Mn2BT Steel: Specifications & Listings

IS 11169 (Part 1):1984 38Cr4Mn2BT: Cold heading quality boron treated steel 38Cr4Mn2BT to IS 11169 (Part 1):1984, for quenching and tempering, supplied as wire, wire rod or bars of 2 to 100 mm diameter. The standard was reaffirmed in 2004.

Category: Alloy Steel
Grade Details
GradeIS 11169 (Part 1):1984 38Cr4Mn2BT
Standard IS 11169 (Part 1):1984
ApplicationsCold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 1570 (Part 4) 38Cr4BT IS 1570 (Part 4):1988 India No activity yet
IS 11169 (Part 1) 40Cr4 IS 11169 (Part 1):1984 India No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 4) 38Cr4BT IS 1570 (Part 4):1988 Strong Match
IS 11169 (Part 1) 38Cr4BT IS 11169 (Part 1):2022 Strong Match
IS 11169 (Part 1) 40Cr4 IS 11169 (Part 1):1984 Strong Match
BS 970 (Part 3) 530M40 BS 970 (Part 3):1991 Close Alternative
BS 970 (Part 1) 530A36 BS 970 (Part 1):1983 Close Alternative
IS 1570 (Part 4) 35C8BT IS 1570 (Part 4):1988 Close Alternative
IS 1570 (Part 4) 50Cr4 IS 1570 (Part 4):1988 Close Alternative
BS 970 (Part 1) 530H36 BS 970 (Part 1):1983 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn Si Cr B
0.35-0.40 0.30-0.50 0.15-0.30 0.95-1.15 0.0005-0.003
Mechanical Properties
Hardness, annealed <=200 HB

More data from IS 11169 (Part 1):1984

From the standard
Other composition limits from the clauses and notes
Sulphur and phosphorus, maximum
0.035 percent each; other limits by agreement
Boron treated (suffix BT)
Narrower manganese and chromium limits may be agreed
Elements not specified, maximum
Cr 0.15, Ni 0.15, Cu 0.15, Sn 0.02, Mo 0.05, V 0.05 percent; total 0.40
Narrower carbon and silicon ranges may be agreed between purchaser and manufacturer; elements not listed are not added except by agreement or to finish the heat.
Source: IS 11169 (Part 1):1984, clauses 4.1.2, 4.1.3, 4.2 and 4.4, Table 2 notes
Hardness in the annealed condition 1 condition
Annealed, maximum
200 HB
Brinell hardness for products delivered in the annealed condition. The last digit is partly obscured in the copy of the standard; read as 200.
Source: IS 11169 (Part 1):1984, Table 5, clause 8.1

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