BS 970:1955 EN47 Steel — Specifications & Listings

BS 970:1955

British standard high carbon silicon-chromium spring steel. Excellent fatigue resistance, high yield strength, and good hardenability. Typically supplied in annealed condition for coiling and forming.

Forms: Round Bar Wire Rod Coil Category: Alloy Steel

Grade Details

Grade	BS 970:1955 EN47
Standard	BS 970:1955
Description	British standard high carbon silicon-chromium spring steel. Excellent fatigue resistance, high yield strength, and good hardenability. Typically supplied in annealed condition for coiling and forming.
Applications	Coil springs, leaf springs, torsion bars, valve springs, suspension springs, industrial springs requiring high fatigue life.

Equivalent / Similar Grades

Grade	Standard	Region
51CrV4	DIN/EN	Europe
AISI 6150	SAE	USA
SUP10	JIS	Japan
SAE5160	SAE	USA
SUP9	JIS G4801	Japan
55Si7	DIN EN 10089	Germany
60Si7	IS	India
IS 11169 Grade 1	IS 11169	India

Chemical Composition (%)

C	Si	Mn	Cr	V	S	P
0.45–0.55	1.50–2.00	0.60–0.90	0.20–0.50	0.10–0.20	≤0.040	≤0.040

Mechanical Properties

Tensile Strength	1080–1230 MPa
Yield Strength	≥925 MPa
Elongation	≥10%
Hardness	311–363 HB

Typical Available Sizes

Round Bar	16mm – 100mm dia
Flat Bar	20×6mm – 100×25mm
Spring Flat	3×20mm – 16×100mm

Sizes are indicative. Contact seller for exact availability.

Active BS 970:1955 EN47 Listings on M-EX

BS 970:1955 EN47 Round Bar

1.700 MT

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BS 970:1955 EN47 Round Bar

1.900 MT

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BS 970:1955 EN47 Round Bar

2.300 MT

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BS 970:1955 EN47 Round Bar

2.000 MT

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BS 970:1955 EN47 Round Bar

1.600 MT

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BS 970:1955 EN47 Round Bar

0.900 MT

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