DIN 51GrV4 Hardened Spring Steel High Yield Strengths Dimensional
Stable
SAE grade | Composition | Yield strength | Hardness (HRC) | Comments |
(ASTM grade) | | | Typical | Maximum | |
1070 | 0.65-0.75% C, 0.60-0.90% Mn, max .050% S, max .040% P | Normally supplied annealed | 165vpn | 180vpn | CS70, CK67, C70E |
1074/1075 | 0.70–0.80% C, 0.50–0.80% Mn, max. 0.030% P, max. 0.035% S | 62–78 ksi (430–530 MPa) | 44–50 | 50 | Scaleless blue,or Polished Bright |
1080 (A228) | 0.7–1.0% C, 0.2–0.6% Mn, 0.1–0.3% Si[6] | | | | Piano wire, music wire, springs, clutch discs |
1095 (A684) | 0.90–1.03% C, 0.30–0.50% Mn, max. 0.030% P, max. 0.035% S | 60–75 ksi (413–517 MPa), annealed | 48–51 | 59 | Blue, or polished bright spring steel |
5160 (A689) | 0.55–0.65% C, 0.75–1.00% Mn, 0.70–0.90% Cr | 97 ksi (669 MPa) | | 63 | Chrome-silicon spring steel; fatigue-resistant |
50CrV4 (EN 10277) | 0.47–0.55% C, max. 1.10% Mn, 0.90–1.20% Cr, 0.10–0.20% V, max.
0.40% Si | 1200 MPa | | | Old British 735 H1steel, SAE 6150, 735A51 |
9255 | 0.50–0.60% C, 0.70–0.95% Mn, 1.80–2.20% Si[9] | | | | |
301 spring-tempered | 0.08–0.15% C, max. 2.00% Mn, 16.00–18.00% Cr, 6.00–8.00% Ni | 147 ksi (1014 MPa) | | 42 | Equivalents EN 10088-2 1.4310, X10CrNi18-8 |
Spring steel is a name given to a wide range of steels used in the
manufacture of springs, prominently in automotive and industrial
suspension applications. These steels are generally low-alloy
manganese, medium-carbon steel or high-carbon steel with a very
high yield strength. This allows objects made of spring steel to
return to their original shape despite significant deflection or
twisting.
Spring steel is often used because of its high yield strengths,
resistance to deformation, and its ability to return to its
original shape. Our spring steel and spring steel strips are
available as heat-treatable annealed, which allows the forming to
occur prior to the heat treatment, or heat treated, where the steel
is previously hardened, tempered, or sprung. Our inventory of
annealed spring steel can be easily formed, tempered, heat treated,
blanked or shaped.
Chemical Composition(%)
Steel Grade | C | Si | Mn | P | S | Cr | V |
|---|
6150 | 0.48-0.53 | 0.15-0.35 | 0.70-0.90 | 0.035 max | 0.040 max | 0.90-1.10 | 0.15 min |
SUP10 | 0.47-0.55 | 0.15-0.35 | 0.65-0.95 | 0.030 max | 0.030 max | 0.80-1.10 | 0.15-0.25 |
51CrV4 | 0.47-0.55 | 0.40 max | 0.70-1.10 | 0.025 max | 0.025 max | 0.90-1.20 | 0.10-0.25 |
735A50 | 0.46-0.54 | 0.10-0.40 | 0.60-0.90 | 0.040 max | 0.040 max | 0.80-1.10 | 0.15 min |
Benefits of Spring Steel
STRENGTH
Spring Steel is typically used because of its high yield strengths,
resistance to deformation and its ability to return to its original
shape.
RESISTANT
Precision Steel also carries large inventories of stainless spring
strip steel. Stainless Spring steel is known for being resistant to
water, environmental, and pollution exposure. With two main groups,
stainless spring steel can either be austenitic or martensitic. The
austenitic stainless spring steel strips like 301 and 302 are
temper rolled for light springs versus the martensitic spring
steels, such as the 420 stainless strips, that are heat treatable
for high hardness and toughness and are typically used for hardened
tools.
EXPERIENCE
At Precision Steel, our sales representatives are experts in spring
steel products. Let us help you find the right spring steel for
your application.
FLATNESS
It has not been practical to formulate flatness tolerances for cold
rolled carbon spring steel to represent the range of widths and
thicknesses and variety of properties produced in coils and cut
lengths.
Our high-performance spring steels are used in applications
requiring parts capable of reliably absorbing and re-exerting
force. A good example of such applications are the spring
diaphragms found in automobiles or the retractor springs in seat
belt systems, which are tempered and re-rolled.
The elasticity of the spring steel plays an important role in the
functionality of these dynamically highly loaded parts. It
determines how much force the material is able to absorb without
being permanently deformed. The yield strength represents the
maximum force which the material can absorb and subsequently
release while still returning to its original shape.
Yield strength is an important parameter which we are capable of
calibrating to a precise degree thanks to our experience combining
chemical composition, cold rolling and heat treatment. When it
comes to spring steels, we are able to manufacture various
high-performance materials with yield strengths (Rp0.2) of up to
2,800 MPa (406 ksi).
Our products withstand countless millions of loading and unloading
cycles over the course of their service lives. In several cases,
such as those described above, these parts perform safety-related
functions. Get in touch with us to discuss exactly what you need.
We will manufacture a customized spring steel to perfectly meet
your project requirements.
